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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29 multiple choice 1 point p(b) = 2/3 p(a ∩ b) = 1/6 what will p(a) hav…
\(\frac{1}{4}\) (the third option)
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27 multiple choice 1 point p(a) = 8/15 p(b) = 6/15 p(a ∩ b) = 1/5 find …
11/15
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multiple - choice question what do the symbols represent: $overline{x}$…
sample mean, population mean, and sample size
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in a random sample of 17 people, the mean commute time to work was 32.2…
D. With 99% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
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suppose that the lengths of human pregnancies are normally distributed …
(a) \(254\) days and \(282\) days. (b) \(95\%\)
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suppose that the mean cranial capacity for men is 1120 cc (cubic centim…
(a) \(220\) cc and \(2020\) cc. (b) \(68\%\)
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in a random sample of 17 people, the mean commute time to work was 32.2…
The confidence interval for the population mean \(\mu\) is \((27.0,37.4)\)
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when a population is finite, the formula that determines the standard e…
\((10.56,14.44)\)
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suppose that the mean systolic blood pressure for women over age sevent…
(a) Approximately \(99.7\%\) of women over seventy have blood pressures between \(116\) mmHg and \(152\) mmHg. (b) Approximately \(68\%\) of women over seventy have blood pressure…
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word problem involving the probability of a union in a big cooler in th…
\(0.48\)
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multiple - choice question what parameters are used in hypothesis testi…
mean, variance, and standard deviation
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fran the fearless has a well - known act at a local zoo. as part of the…
\(0.89\)
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in a packet of stickers there are 6 small stars, 7 big stars, 10 small …
\(0.76\)
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a group of 125 people were asked if they own a car and a bicycle. 35 sa…
The probability that a person owns a bicycle given that they own a car is \(0.4\)
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there are two boxes containing only blue and orange pens. box a has 9 b…
Event 2, Event 4, Event 3, Event 1
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read the following excerpt from levitt and dubners freakonomics. a key …
C. a contrast between different types of crime.
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the following chart shows the most downloaded apps among a sample of us…
VI
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despite all the attention paid to rogue companies like enron, academics…
presenting logical statements.
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a math tutor working with a small study group has classified students i…
B. {Cam, Eva, Gus, Mel, Ken, Pat, Ben, Lon, Flo, Ny, Oli}
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what is another way to express class rank? a. year rank b. gpa c. perce…
C. Percentile rank
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what is meant by the term liberal?
The term "liberal" can refer to a political ideology emphasizing individual rights, equality, and progressive social policies, as well as a more general sense of being open - mind…
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read the following excerpt from levitt and dubners freakonomics. he had…
Feldman kept rigorous data on his business.
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here are three histograms. (a) which histogram is skewed to the left th…
(a) Histogram B (b) Histogram C (c) Histogram A (d) Histogram A
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weight away, a company that sells weight - loss plans, often advertises…
\(0.28\)
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use the venn diagram shown to the right to list the set a∩b in roster f…
\(A\cap B=\{11,14,6\}\)
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last year over 8000 students took an entrance exam at a certain state u…
(a) Both Mai and Manuel scored higher than the median. (b) Mai scored higher than about \(94\%\) of the students who took the exam.
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a professional golfer is shopping for a new brand of golf ball. she lik…
\(6572\)
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use the venn diagram shown to answer the question below. which regions …
\(IV, V\)
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course: math intervention math b unit: unit 25 statistics and grap 8 18…
C. Josh’s bowling scores are improving overall.
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26) use the given data to make a scatter plot of joshs bowling scores. …
A. Positive correlation
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32) the graph below represents the population of a city for three conse…
C. The population is about the same over the time period.
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question 10 of 10 after the e. coli outbreak, many felt that it was a(n…
B. opportune
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consider the scatter plot and then answer the next two questions. 23) t…
23) B. Negative correlation 24) Negative slope
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use linear regression to find a function that fits the following points…
\(2x+3\)
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a math tutor working with a small group of students asked each student …
Hannah, Josh, Alma, Chris, Kelly
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read the quotation, and then answer the questions. manifested means sho…
worthy of respect
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consider the scatter plot and then answer the next two questions. 23) t…
B. Negative correlation
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read the quote, and then answer the question. the word regulated means …
Jackson believed that government should be for the people, of the people, and by the people.
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read the quote, and then answer the question. the word regulated means …
the people
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completing the sentence choose the word from the word bank that best co…
1. cogent 2. expunge 3. nonchalant 4. uncanny 5. ascertain 6. skulked 7. finite 8. omniscient 9. converge 10. supercilious
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1. what does dracula mean in romanian? a. vampire b. son of the dragon …
1. B. son of the dragon 2. D. the belief that he sometimes ate bread dipped in blood 3. A. Snagov
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which sentence is an example of an objective summary from cynthia cross…
D. Americans are addicted to cheap, bad food, he argues, and like all addictions, this one exacts broad and often unseen costs from the community.
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use the venn diagram to represent set u in roster form. u= (use a comma…
\(1,5,8,10,13,16,19,24,25\)
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which is the best reason to use a direct quote in your research paper? …
A. To show someone's distinct voice
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to test the hypothesis that the average fear among republican voters is…
For the first question: t - test. For the second question: - 0.58.
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question 2 (1 point) ✓ saved to test the hypothesis that the average fe…
t - test
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question 13 which of the following is an example of qualitative data? w…
Hair color
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at a game show, there are three doors marked 1, 2, and 3. a contestant …
A. The missing term is A - 2. The sample size would be 6.
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i started to clean everything up, and that was when i noticed else some…
It creates sympathy. It creates interest.
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i started to clean everything up, and that was when i noticed else some…
He is desperate for a link to his father.
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a survey was conducted to find out whether students prefer studying in …
Students are more likely to prefer a quiet environment overall.
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select the correct answer. jims sock drawer has two pairs of black sock…
B. \(\frac{4}{13}\)
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select the correct answer. you pick a card from a shuffled pack and dra…
C. independent
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answer the question based on the data in the table. persons age select …
C. \(0.531\)
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type the correct answer in each box. use numerals instead of words. if …
\(\frac{1}{9}\), \(\frac{1}{3}\)
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i bought the exact same phone and ran home and recorded our greeting fr…
- The box is hidden under the jewelry workbench and albums of foreign currencies. - The jewelry workbench and albums of foreign currencies are hidden under stuff in the closet.
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type the correct answer in each box. use numerals instead of words. if …
\(\frac{1}{9}\), \(\frac{1}{3}\)
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5) devon surveyed his classmates to find out in what month they were bo…
(a) \(10\) (b) \(7\) (c) \(7\) (d) \(10\)
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5) devon surveyed his classmates to find out in what month they were bo…
(a) \(10\) (b) \(7\) (c) \(5\) (d) \(10\)
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4) the 2005 hurricane season was a highly active season. the hurricanes…
$122.8$
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3) jamie has taken three math tests. her scores were 88, 94, and 95. to…
B. Sum = 376; needed score = 99
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select the correct answer then, press the submit button the story says …
A. walked far from its home.
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2) ten people donated money to a local school charity. one donated $201…
D. (a) Mean = \$21, Median = \$1, Mode = \$1. (b) Do not use the mean — the outlier (\$201) skews it.
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what psychological effect does shakespeare achieve by having banquos gh…
The ghost represents Macbeth’s guilt and his fears regarding the security of his throne.
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1) what is the mean, median, and mode for the following data set: {63, …
A. Mean = 59.9, Median = 56.5, Mode = 46
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question 7 in which decade (10 - year interval) did the population grow…
From 1910 and 1920. The graph has the steepest slope between the two points on the graph \((1910,22)\) and \((1920,32)\) as its slope \(m = 1\) (calculated using the slope formula…
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when we refer to the expansion of europe during this era, we mean that …
B. Europe was emerging, for the first time, as a center of power and influence.
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section 4: inflation inflation is the general increase in prices for go…
1. price 2. consumer price index 3. percentage 4. value 5. deflation
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3) i randomly select 25 students math sat scores and find \\( \\overlin…
- For \(n = 25\): The 99% confidence interval is \((574.24,625.76)\) - For \(n = 100\): The 99% confidence interval is \((587.12,612.88)\)
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which two data sets appear to be normally distributed? a. | value | 5 |…
A. Option A, C.
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confidence intervals practice practice problems - do in your notes, ans…
1. The 95% confidence interval is \(580.4<\mu<619.6\). Interpretation: We are 95% confident that the True population mean of Math SAT scores lies between \(580.4\) and \(619.6\) 2…
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10. how did the missile strike on sudan in 1998 affect the plans for a …
10. Plans were changed to have hijackers enter the US and take flying lessons. 11. Wall Street closed for a week.
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9. checked luggage weights for delta airlines are right skewed with a p…
For problem 9: The probability is approximately $0.0681$. For problem 10: The probability is approximately $0.1151$.
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select the correct answer. a student club has 15 members. how many ways…
C. 5,005
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taxes are compulsory financial contributions imposed by a government to…
1. government activities 2. Income 3. sales 4. Property 5. tax evasion
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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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janie asked all of her classmates about the number of pets they have in…
The survey represents quantitative data.
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no offence to frank, but after the fiasco at fort sumter leo had become…
guided by or in accordance with a sense of right and wrong
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with fare like that, most locals shunned the place, leaving it for sail…
food
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poised has the same or almost the same meaning as: obtainable collected…
B. collected
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heedful has the same or almost the same meaning as:neutralattentivefriv…
B. attentive
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club kalfour turned out to be a discreet little operation on the corner…
not undesirably noticeable
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alexander mikhailov of the kazan state conservatoire said the allegatio…
B. barefaced
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students in mrs. camerons third grade class are working on times tables…
2 weeks
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supple has the same or almost the same meaning as: limber subjective as…
limber
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their lives inevitably became more complex, but their music retains a l…
B. brilliant
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using context clues quick check use the sentence to answer the question…
satisfy
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decide whether the following statement makes sense (or is clearly true)…
D. The statement does not make sense, because it is possible to appear better in each of two or more group comparisons but still be worse overall because of how the data are divid…
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use the sentence to answer the question. william was afraid to begin th…
intimidating
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use the context clues in the sentence to answer the question. benjamin …
with little thought
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use the context clues in the sentence to answer the question. the aroma…
smell
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revel means to: conduct legal proceedings against a defendant engage in…
engage in uproarious festivities
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using context clues quick check which phrase describes a context clue? …
words or phrases in a text that help the reader determine the meaning of a word
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there is a calm and dignified simplicity in the manners of general dors…
A. proud
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question 10 (1 point) four different pencils have lengths of 12.45 cm, …
12.21 cm
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the amount of rainfall each month over the past four years is shown bel…
The data is skewed, showing that the majority of the monthly rainfall amounts was less than 2.01 or greater than 4 inches.
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staff from the school newspaper is taking a poll to find out how studen…
Every tenth student in the main hallway between class.
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which sample fairly represents the population? select two options. meas…
- B. calling every third person on the soccer team's roster to determine how many of the team members have completed their fundraising assignment - E. taking a poll in the lunch r…
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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 smart phone 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.