统计与概率
数据分析、概率分布、假设检验与统计方法。
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act reading practice worksheet #5 passage type: literary narrative (fic…
4. C. She feels braver and more mature 5. D. "Lena couldn't help but feel something had shifted..." 6. A. Mysterious and reflective 7. B. She was afraid because of stories she had…
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cool down: roar of the crowd the scatter plot shows the maximum noise l…
For every 1000 - person increase in the stadium crowd, the maximum noise level increases by \(1.5\) decibels. # 2. ## Step - by - Step Format: ## Step1: Substitute \(x = 65\) into…
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4) narrative means oa) poem ob) story oc) song od) fact save not graded
B. Story
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the fifth paragraph is meant to support the authors main claim that fre…
The author does not explain how children could be endangered by a lack of municipal Wi - Fi.
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a venn diagram shows the memberships for the art, chess, and science cl…
(a) Chess (b) 3 (c) Mary
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a venn diagram shows the memberships for the science, dance, and spanis…
(a) Science, Spanish (b) 2 (c) Kala
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what is the figurative meaning of the phrase \good walls make good neig…
It means that having clear boundaries helps maintain good relationships.
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a venn diagram shows the memberships for the math, music, and science c…
(a) Math, Science (b) 10 (c) Mary, Dan, Ann, Ryan
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a venn diagram shows the memberships for the math, spanish, and art clu…
(a) Spanish (b) \(3\) (c) Ravi, Dan
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a venn diagram shows the memberships for the spanish, chess, and music …
(a) Chess, Music (b) \(2\) (c) Elsa, Greg
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a venn diagram shows the memberships for the science, math, and music c…
(a) Math, Music (b) \(10\) (c) Greg, Jina, Hong, Ali, Ryan
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the table shows values for the function f at selected values of x. whic…
D. non - linear rates of change
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checking for independence you know that if two events, a and b, are ind…
\(P(\text{rain}) = 0.8\); \(P(\text{damaging winds})=0.5\); \(P(\text{rain and damaging winds}) = 0.2\)
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the student is writing a reflection paper for her music appreciation cl…
evoke, collection
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the student council is writing a letter to the principal about a progra…
B. unequal access to computers
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checking for independence you know that if two events, a and b, are ind…
\(P(\text{letter card})=\frac{1}{2}\) \(P(\text{square card})=\frac{1}{2}\) \(P(\text{letter and square})=\frac{1}{4}\)
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each labeled with the numbers 1 to 6. the first column shows the possib…
\(P(K)=\frac{1}{24}\), \(P(C)=\frac{8}{1029}\)
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5. the box plot represents the distribution of the number of points sco…
a. Not possible. A box - plot does not give individual data points needed to calculate the sum for the mean formula \( \bar{x}=\frac{\sum_{i = 1}^{n}x_{i}}{n}\). b. The median is …
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the two events, rolling a 3 on the first number cube and rolling a 3 on…
If we assume the number of students is \(n\): \(P(S_1)=\frac{1}{n}\), \(P(S_2)=\frac{1}{n}\), \(P(S_3)=\frac{1}{n}\), \(P(S_1\cap S_2\cap S_3)=\frac{1}{n^3}\) If we assume \(n = 1…
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possible points: 5 you overhear your friend ginny say, \i made a budget…
Ginny identified what is important to her and used that knowledge to decide how to use her money.
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the table shows the total possible outcomes of rolling two number cubes…
The probability of rolling two 3s is \(\frac{1}{36}\). \(P(O)=\frac{1}{2}\), \(P(E)=\frac{1}{2}\), \(P(O\ and\ E)=\frac{1}{4}\)
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20 jackson handed the device to her nervously, worried she might damage…
Al principio, Larissa es desdichada y crítica con la máquina de tiempo de Jackson. Al final, admite que Jackson inventó algo fantástico y muestra entusiasmo por ver qué inventará …
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if he just rearranged the cabinet, he could probably fit more things in…
Jack decided his kitchen was clean enough even though it was messier than when he had started to tidy it.
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1) what quotation from revenge of the geeks best supports the claim tha…
Psychologists point out that high - status cliques teach the exclusionary behavior that may be the foundation for eventual racism, anti - Semitism, and other forms of bigotry.
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use this paragraph from \the reward of enterprise\ to answer the questi…
tear
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17which adage best exemplifies swifts effort in addressing a social inj…
17. “The pen is mightier than the sword.” 18. By claiming as an Englishman, he cannot sell any of his children for money. 19. Logos
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reflection questions 15. what do you think frederick douglass meant whe…
Frederick Douglass meant that it was a cruel mockery to celebrate liberty (a "grand illuminated temple of liberty") while African - Americans were enslaved (in "fetters"). Asking …
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language and style unit test use the sentence to answer the question. s…
to politely describe a negative trait
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0.00584 < 0.05 the ho is accepted for a t - test run at a 5% significan…
The correct conclusion is "0.00584 < 0.05 the $H_0$ is rejected".
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claim: the average weight of males is greater than 53 kg. ten male stud…
$H_0:\mu = 53$
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when testing with α = 0.01 you get p = 0.12. your decision should be fa…
Fail to reject \(H_0\), there is NOT a significant difference.
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when testing with α = 0.01 you get p = 0.12. your decision should be ac…
Accept \(H_0\), there is NOT a significant difference
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read this excerpt from chapter 41 of moby - dick using comprehension st…
A. Though Ahab is physically weakened, his will for revenge has strengthened him.
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if we wanted to compare average iq to determine if senior boys are brig…
Two - Sample T Test
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jasmine has been a victim of domestic violence. what does this most lik…
Her boyfriend has tried to hurt her.
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a manufacturer claims that his tires last at least 40,000 miles. a test…
\(H_0:\mu\geq40000\) and \(H_1:\mu < 40000\) (the second option in the given choices)
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a manufacturer claims that his tires last at least 40,000 miles. a test…
\(t - score=-461.86\)
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a manufacturer claims that his tires last at least 40,000 miles. a test…
\(t\approx - 3.23\)
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select the correct null and alternate hypothesis a random sample of 49 …
\(H_0:\mu = 60\), \(H_a:\mu<60\) (the third option in the given choices)
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on a trip, 2 sisters counted 1,430 vehicles. they divided the vehicles …
The probability that a randomly selected truck is black is \(\frac{31}{479}\approx0.065\)
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jvran asked all of her classmates about the number of pets they have in…
The survey represents quantitative data.
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when p - value is greater than alpha we: accept ho accept ho accept h1 …
Accept $H_0$
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a one sample t - test is conducted on ho: \\( \\mu = 81.6 \\) and ha > …
Reject \(H_{0}\)
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a used car dealer says that the mean price of a 2008 honda cr - v is at…
t - score = - 2.244 (rounded). There is enough evidence to reject the dealer's claim at $\alpha = 0.05$.
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the school newspaper is taking a poll to find out how students in the s…
Every tenth student in the main hallway between class.
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which example represents the population? select two options. measuring …
measuring the height of every fiftieth person on the school roster to determine the average height of the boys in the school; taking a poll in the lunch room (where all students c…
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p-value > 0.05 - theres statistical difference p-value < 0.05 - theres …
P - Value < 0.05 - there’s statistical difference
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nia ghia scored each basketball game so far this season is shown on the…
The data is skewed to the left and shows that she never scored lower than 2 points or more than 12 points in a game.
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no ages of the people in attendance at the showing of an award - winnin…
The data is symmetrical, showing that the majority of the attendees were between the ages of 21 and 60.
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what percentage of the shape is purple? write your answer using a perce…
\(80\%\)
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1. janelle ran the half - block from the subway station to the office. …
Janelle’s words are the opposite of what she means.
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a poll is being taken on wednesday to predict which movie will be the m…
Every fifth person walking down the street in several different locations throughout town at different times of day.
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a survey was taken of a random sampling of residents of new york city a…
There is a greater percentage of LA residents who own a car than NYC residents who do.
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explain how understanding the roots \acerb\ and \acri\ can help you dec…
Understanding word roots like "acerb" and "acri" (both related to sour/bitter) helps infer meanings. Example: "acerbic" (from "acerb") means sharp/bitter (e.g., an acerbic remark).
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which is an example of a survey involving quantitative data? the favori…
the number of cavities each person has had
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which word, derived from \acerb,\ means to make more harsh or bitter? *…
B. Acerbate
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the root \acri\ is most closely associated with which of the following …
C. Sharp
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the amount of rainfall each month over the past four years is shown bel…
The data is symmetrical, showing that the majority of the monthly rainfall amounts was less than 2.01 or greater than 4 inches.
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solve the equations. 1) ( 5(b + 8)+6.9 = 6b - 8 ) 2) ( 4w + 22 = 6w + 3…
1. \(b = 54.9\) 2. \(w=9.5\) 3. \(y\) - intercept is \(5\), it means the base cost to attend the fair (cost with \(0\) rides) 4. Slope is \(1.75\), it means the cost per ride 5. \…
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sal recorded the number of crackers in each snack - sized package he op…
The data is skewed, and the lowest number of crackers in a package was \(7\) (the third option).
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darren kept track of the number of e - mails he received from one of hi…
The data is skewed right and shows that on half of the days, Darren received 11 or 12 e - mails from the customer.
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a cell phone company wants to determine the average amount of data that…
one thousand of their customers with a current smartphone data plan
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ryan called each school in the district to determine whether or not the…
Ryan conducted a survey where he asked about qualitative data.
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the number of text messages that reza sent each day so far in this bill…
The data is skewed and shows that he typically sent about 6 to 8 text messages per day.
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irinas basketball team has a 1 in 6 chance of winning the first - place…
simulation
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nico wanted to determine the number of students in his school who buy s…
observational study
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kira looked through online census information to determine the average …
Kira used published data that is quantitative.
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write the null and alternative hypothesis h₀: μ₁ = μ₂ h₁: μ₁ < μ₂ h₀: μ…
The three common pairs of null and alternative hypotheses for comparing two population means \(\mu_1\) and \(\mu_2\) are: 1. \(H_0:\mu_1 = \mu_2\) and \(H_1:\mu_1<\mu_2\) 2. \(H_0…
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when testing with α = 0.05 you get p = 3.2 e - 6. your decision should …
Reject $H_0$, there is a significant difference.
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usa today reported that in 1992, 39% of all elementary school children …
\( H_0:p = 0.39\), \( H_a:p>0.39\) (the last option in the given list)
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4. a student has these scores on their assignments. the teacher is cons…
The mean increases from $69$ to approximately $76.67$ and the median increases from $77.5$ to $80$.
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what is an analogy? (1 point) a figure of speech that uses one thing to…
a figure of speech that uses one thing to explain something else
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a used car dealer says that the mean price of a 2008 honda cr - v is at…
\(H_0:\mu\geq20500\), \(H_1:\mu < 20500\) (the second option in the given choices)
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the weight of the average 6th grade boy is 89 lbs. the principal of the…
\(H_0:\mu = 89\), \(H_1:\mu eq89\) (the second option in the given list)
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1, select all the distribution shapes for which it is most often approp…
A. bell - shaped, D. symmetric, E. uniform 2.
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question 7 (100 points) which statement best describes the concept behi…
Question 7: C. Art should reflect popular culture and mass production. Question 8: A. It criticized the uniqueness of fine - art in a mass - media world.
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4. the data represent the number of ounces of water that 25 students d …
A dot - plot with \(x\) - axis labeled as \(8,16,32,64,80,88\) and the corresponding number of dots ( \(3,3,6,6,4,3\) respectively) above each value.
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centerville tech company at the centerville tech company, seven employe…
\(3417.86\)
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if a ball is thrown upward at 39.2 meters per second from the top of a …
For part b: B. The ball reaches its maximum height of 103.4 meters in 4 seconds. For part c: C. Until \(t = 4\) seconds; at 4 seconds, the ball reaches its maximum height and then…
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if a ball is thrown upward at 39.2 meters per second from the top of a …
B. The ball reaches its maximum height of 103.4 meters in 4 seconds.
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which of the following three statements are best supported by the clubs…
D. The median game score of Club 1 is exactly equal to the median game score of Club 2
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watch the video and then solve the problem given below. click here to w…
The vertex of the graph of this model is \(v=(14.25,1.983)\). This means that in the year \(2015 + 14.25=2029.25\) (approximately 2029), the U.S. crude oil production is at a maxi…
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the us crude oil production, in billions of barrels, for the years from…
a. The vertex is \((13, 2.139)\). It means that in 2008, the maximum number of billions of barrels of crude oil is \(2.139\) billion barrels. b. \(1.739\) c. (Since the function i…
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score by two clubs club 2 club 1 which of the following three statement…
D. The median game score of Club 1 is exactly equal to the median game score of Club 2
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the u s. crude oil production, in billions of barrels, for the years fr…
The vertex of the graph of this model is \(v=(14.5,2.188)\). This means that 14.5 years after 2005 (i.e., in the year \(2005 + 14.5=2019.5\)), the U.S. crude oil production is at …
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find the following descriptive statistics of the boxplot below: minimum…
Minimum Value: \(12\) First Quartile: \(14\) Median: \(16\) Third Quartile: \(19\) Maximum Value: \(20\) Range: \(8\) Interquartile Range: \(5\)
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the monthly incomes of a group of 8 individuals are as follows: $3,000,…
There is an individual or a few individuals earning substantially more than the others, causing the mean to be higher than the median.
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the dotplots below show the amounts of money the same group of 30 shopp…
October Median: \(180\) December Median: \(200\)
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the amount of a particular pollutant ( p ) in the air depends on the wi…
a. The correct graph is D (since when \(s = 0\), \(p = 25\) and the function is a downward - opening parabola for \(s\geq0\)). b. The function \(p(s)\) is decreasing on the domain…
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for two consecutive weeks, everett tracked his daily expenses on transp…
First week
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determine any outliers for the data set. select all that apply. 6, 6, 1…
D. 56
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find the mean of the following set of numbers. 8,5,9,5,5,7,3 mean =
\(6\)
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rosas lawn mowing the stem - and - leaf plot shows what rosa was paid f…
\(40.5\)
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3 the box - and - whisker plot below shows the distribution of the numb…
D. 125
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2 choose the set of data that is displayed in the box plot. data set a:…
Data set B
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for questions #16 - 20, refer to the following passage: the confused st…
C. Orator
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for questions #16 - 20, refer to the following passage: the confused st…
A. Anecdote
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find the following descriptive statistics of the boxplot below: minimum…
Minimum Value: \(7\) First Quartile: \(12\) Median: \(14\) Third Quartile: \(17\) Maximum Value: \(22\) Range: \(15\) Interquartile Range: \(5\)
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for questions #16 - 20, refer to the following passage: the confused st…
D. Novice
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for questions #16 - 20, refer to the following passage: the confused st…
B. Nonchalant