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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which sentence uses this meaning of appeal? appeal noun attractiveness …
I don't see the appeal of getting email on your phone.
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which sentence uses this meaning of entrance? entrance verb to fill som…
Great art has the power to entrance its viewers.
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which sentence uses this meaning of bore? bore verb to make a hole the …
The construction workers will bore into the concrete and insert the steel pipe.
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which sentence uses this meaning of bloom? bloom noun a blossom a sudde…
A. A sudden gust of wind blew a small white bloom off the tree.
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which sentence uses this meaning of exhaust? exhaust verb to make someo…
Did spending all day walking around exhaust you?
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a website that reviews recent movies lists 5 five-star films (the highe…
| Stars | Frequency | Relative frequency | Cumulative frequency | | :---: | :---: | :---: | :---: | | 5 | 5 | 10% | 5 | | 4 | 17 | 34% | 22 | | 3 | 14 | 28% | 36 | | 2 | 10 | 20% …
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which sentence uses this meaning of charm? charm noun a small object wo…
The glass charm on Elizabeth's wrist sparkles in the sunlight.
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which sentence uses this meaning of plot? plot verb to make a plan on o…
Before the game begins, we quietly plot a way to beat the other team.
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a website that reviews recent movies lists 5 five-star films (the highe…
| Stars | Frequency | Relative frequency | Cumulative frequency | | :---: | :---: | :---: | :---: | | 5 | 5 | 10% | 5 | | 4 | 17 | 34% | 22 | | 3 | 14 | 28% | 36 | | 2 | 10 | 20% …
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which sentence uses this meaning of concrete? concrete noun a gray buil…
The shelter in the woods behind their house was made from concrete.
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a website that reviews recent movies lists 5 five-star films (the highe…
| Stars | Frequency | Relative frequency | Cumulative frequency | | :---: | :---: | :---: | :---: | | 5 | 5 | 10% | 5 | | 4 | 17 | 34% | 22 | | 3 | 14 | 28% | 36 |
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a website that reviews recent movies lists 5 five-star films (the highe…
| Stars | Frequency | Relative frequency | Cumulative frequency | | :---: | :---: | :---: | :---: | | 5 | 5 | 10% | 5 | | 4 | 17 | 34% | 22 |
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after growing tired of squinting while driving, desmond went shopping f…
\(\frac{1}{18}\)
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a website that reviews recent movies lists 5 five-star films (the highe…
| Stars | Frequency | Relative frequency | Cumulative frequency | | :---: | :---: | :---: | :---: | | 5 | 5 | 10% | 5 |
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brett is a sandwich maker at a local deli. last week, he tracked the nu…
\(\frac{9}{29}\)
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to get to know her students better, ms. alexander surveyed her math stu…
\(\frac{3}{5}\)
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the owner of a sushi restaurant looked over some recent orders. he note…
\(\frac{2}{11}\)
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a professor records the following final grades in one course. construct…
Total (Frequency): \(24\) Total (Cumulative frequency): \(24\)
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abdul, an aspiring meteorologist, spent the past few weekends studying …
\(\frac{4}{17}\)
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a wilderness retail store asked a consulting company to do an analysis …
\(\frac{3}{4}\)
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regan joined a book club to spend more quality time with her cousin. at…
\(\frac{4}{5}\)
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at a science museum, visitors can compete to see who has a faster react…
\(\frac{11}{14}\)
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dylan looked at some boxes of cereal in the grocery store. for each one…
\(\frac{2}{17}\)
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over a weekend, brody counted the number of single scoop ice creams ord…
\(\frac{1}{10}\)
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(e) since categorical data was collected from each observational unit, …
A. \(N \geq 10n\), where \(N\) is the population size (Hint: This one is required!), D. \(n(1 - \hat{p}) \geq 10\), E. \(n\hat{p} \geq 10\), H. \(n(1 - p) \geq 10\)
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a profess cords the following final grades in one course. construct a f…
| Grade | Frequency | Relative frequency | Cumulative frequency | |-------|-----------|--------------------|----------------------| | A | 3 | 12.5% | 3 | | B | 8 | 33.3% | 11 | | …
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each box. (7, 5, 11, 1) put the data set in order from least to greates…
Ordered set: \((1, 5, 7, 11)\) Maximum: \(11\) Minimum: \(1\) Range: \(10\) Mode: No mode (or all numbers with frequency 1) Mean: \(6\) Median: \(6\)
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6. claim: the average number of times people rehearse a joke before tel…
stat=3.51 null=7 SE=0.57 t.s=3.51 Assuming the null is true, would this be weird? yes
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it is believed that 11% of all americans are left - handed. a college n…
N ≥ 10n, where N is the population size (Hint: This one is required!), np ≥ 10, n(1-p) ≥ 10
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20. which of the following is not an example of checks and balances in …
The president can veto a Supreme Court decision, but only with the support of a two - thirds majority vote in Congress.
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a professor records the following final grades in one course. construct…
| Grade | Frequency | Relative frequency | Cumulative frequency | | ---- | ---- | ---- | ---- | | B | \(8\) | \(34.8\%\) | \(11\) |
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7. claim: the average number of times people press the snooze button be…
stat=6.8 null=5 SE=0.42 t.s=4.29 yes
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a professor records the following final grades in one course. construct…
|Grade|Frequency|Relative frequency|Cumulative frequency| |---|---|---|---| |A|3|13.0%|3|
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8. claim: the average number of jokes people tell at a party is more th…
μ: 10 x̄: 10.5 s: 1 n: 25 t: 2.50 df: 24 p-value: 0.0098 Assuming null is true, weird? Yes
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9. liam and zoe are both conducting a hypothesis test about teen habits…
Liam's z = 22.4 Zoe's z = 4.1 Stronger evidence: Liam
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question 18, 7.3.28 - t part 1 of 3 hw score: 67.31%, 14.81 of 22 point…
\(H_0:\mu = 11.7\), \(H_a:\mu eq11.7\). The claim is the null hypothesis.
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making a grocery in this lesson, you will learn useful words to use at …
1. d 2. f 3. j 4. b 5. i 6. k 7. h 8. a 9. c 10. e 11. g
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mework: homework #12 question 18, 7.3.28-t part 1 of 6 hw score: 67.34%…
\(H_0:\mu = 11.7\), \(H_a:\mu eq11.7\). The claim is the null hypothesis \(H_0\).
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julian scored 24 points over the first 12 games of the basketball seaso…
28
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paragraph 4 & 5 marbury v. madison is one of the most important cases i…
Judicial review is the power of the Supreme Court to declare laws or actions of the government unconstitutional. The Supreme Court case *Marbury v. Madison* established it.
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data sets name: identify the maximum, minimum, range, mode, mea show yo…
Ordered data set: \((3, 5, 10, 10)\) Maximum: \(10\) Minimum: \(3\) Range: \(7\) Mode: \(10\) Mean: \(7\) Median: \(7.5\)
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identify the maximum, minimum, range, mode, mean, and median for each d…
### Data Set (10, 5, 10, 3) - Ordered: \((3, 5, 10, 10)\) - Maximum: \(10\) - Minimum: \(3\) - Range: \(7\) - Mode: \(10\) - Mean: \(7\) - Median: \(7.5\) ### Data Set (7, 5, 11, …
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tammy is packing for a camping trip. there are 5 sleeping bags and 2 pi…
20
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maya is making a piece of toast. there are 5 kinds of bread in the hous…
\(25\)
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reading and finding facts. stop that pacing, fido! if you are planning …
1. D. make other plans 2. C. fair weather 3. D. stars 4. A. crickets 5. B. chirps
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5. a density curve that models the distribution of a quantitative varia…
- Mode: \( C \) (highest point of the density curve). - Median: \( B \) (divides the area under the curve into two equal parts). - Mean: \( A \) (pulled towards the tail of the di…
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.02\)
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.33\)
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.43\)
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.8\)
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.05\)
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the table gives a set of outcomes and their probabilities. let a be the…
0.19
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.3\)
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the table gives a set of outcomes and their probabilities. let a be the…
\(0.4\)
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the table gives a set of outcomes and their probabilities. let a be the…
\( 0.1 \)
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the median of 5, 7, 2, 9, 8 is: 1 point 5 7 8 6
B. 7
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12. a school nutritionist wants to study whether the type of breakfast …
B. Type of breakfast
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9. a teacher wants to know if a new tutoring program improves math scor…
B. Randomization is missing
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b. the science department believes that the average time a lab computer…
t = 2.5625 Degrees of freedom = 24 P-value = 0.008
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7. a teacher claims the average number of hours students sleep on schoo…
t = -2.605 p-value = 0.006
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question 20 (4 points) the probability distribution for the number of p…
\(9.8\)
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8) a certain midwestern university claims that 90% of their football pl…
The university's claim that \(90\%\) of their football players complete their degree in 5 years is likely false. The probability of having only 14 out of 20 players complete their…
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6. the athletic director believes the average vertical jump height of s…
$z = 2.4$ Unusualness (z) = 2.4 Chances (P-value) = 0.008
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5. teachers think that the average time students spend on homework each…
t = 1.83 Unrounded t = 1.831 Corrected P-value = 0.074
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solomon was famous for building a temple in jerusalem. read the followi…
- B. The Temple was meant to be a holy building. - D. The Temple was richly decorated.
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22. 17 let ( a : mathbb{r}^n \to mathbb{r}^k ) be a linear map. show th…
The statements (a), (b), and (c) are equivalent as shown.
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4. the drama club believes that the proportion of students who bring in…
$\hat{p} = \frac{23}{40}$, z ≈ 1.897, P-value ≈ 0.058
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sbac practice 3: youth activism and community change name: ellen r peri…
Question 1: B. Youth activism in Phoenix led to real community improvements and city action. Question 2: C. A program or project Short - written response: The author uses the “Hea…
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some scholars estimate that joshua and the israelites arrived in canaan…
The multi - colored map: ca. 1200 BCE; The green - colored map: ca. 1000 BCE
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7) mrs. g is very good at sudoku puzzles. 75% of the time, she can comp…
- For part d: The standard deviation $\sigma\approx1.37$. It means the number of puzzles Mrs. G completes in under 10 minutes in a set of 10 puzzles deviates from the mean of $7.5…
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question 18 (4 points) in a survey of 100 randomly selected dentists, 2…
238
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characteristics of modern art in america quiz complete 1 2 3 4 5 6 7 8 …
C. both A and B
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question 17 (4 points) a survey of a random sample of voters predicts t…
Candidate A will get between 36% and 46% of votes.
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a soup company wants to know if a new formula would sell better than th…
The 10 that get the old formula
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and indeed there will be time to wonder, \do i dare?\ and, \do i dare?\…
unusual, meandering syntax and revelations about the speaker's thoughts and feelings
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for i have known them all already, known them all: have known the eveni…
- despair and disillusionment: feeling that life is meaningless - introspection: thinking about why one does things - stream of consciousness: a rambling voice mirroring the confu…
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question 14 (4 points) a local bank wants to estimate how much time cus…
There is a 95% chance that the average weight time for customers will range from 3.8 - 6.2 minutes.
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question 13 (4 points) suppose x is a normally distributed random varia…
2.5%
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5) zach is an 85% field goal kicker. each goal he kicks is independent …
| Situation | Probability Notation | Formula | Value | |---|---|---|---| | What is the probability Zach will make exactly 25 kicks? | \(P(X = 25)\) | \(\binom{30}{25}0.85^{25}\cdo…
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part 1 of 3 the venn diagram shows the factors of 24 and 88. use the di…
- The left region has: Factors that are only of 24. - The shared region has: Factors that are common to both 24 and 88. - The right region has: Factors that are only of 88.
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12 multiple choice 1 point according to a survey done in 1946, 91% of a…
There is sufficient evidence to conclude that the proportion of adult women who are mothers is less than 0.91.
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11 multiple choice 1 point in the 1990s, the mean time it took a colleg…
D. There is insufficient evidence to conclude that the mean time it takes a college student to graduate is greater than 4 years.
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in this lesson, you will learn english words and expressions to use whe…
1. h 2. d 3. a 4. (assuming the correct option for beauty supplies is the one for appearance care, but based on given options, maybe a misprint; but proceeding with the rest as ab…
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9 multiple choice 1 point a study is being done to test whether there i…
Null Hypothesis is $p_1 = p_2$. Alternative Hypothesis is $p_1 eq p_2$.
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8 multiple choice 1 point a study is being done that compares the mean …
Null Hypothesis is $\mu_1 = \mu_2$. Alternative Hypothesis is $\mu_1 < \mu_2$.
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3 multiple choice 1 point in 2007, the average time that people spent w…
Left-Tailed
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identify independent and dependent variables in tables and graphs (grap…
1. m is the independent variable, and t is the dependent variable. 2. 10 times
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identify independent and dependent variables in tables and graphs (grap…
a) t is the independent variable, and f is the dependent variable. b) 5 less than
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read the sentence: the politician’s smile seemed \calculated,\ not \fri…
1. He was careful and strategic in his behavior 2. Personification comparing the city to a living creature 3. The story reflects alienation and uncertainty, influenced by rapid so…
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the weight of a car can influence the mileage that the car can obtain. …
The Top Graph
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b multiple choice 1.25 points a sample of 9 employees was taken at a fa…
A. There is no interpretation for the y intercept since you can't have -32 absences.
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7 multiple choice 1.25 points a sample of 10 students was taken from a …
For each additional hour of studying, the final exam score increases by 4.82 points on average.
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14. two data sets are shown below. data set a: 12, 18, 25, 30, 30, 34 d…
Mean of Data Set A: ≈24.83 Mean of Data Set B:27.5 Range of Data Set A:22 Range of Data Set B:35 Data Set A has the higher mean? F Data Set B has the higher mean? T Data Set A has…
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5 multiple choice 1.25 points the least-squares regression line for som…
3.2
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4 multiple choice 1.25 points a sample of 10 students was taken from a …
75.84
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3 multiple choice 1.25 points the weight of a car can influence the mil…
B. $\hat{y}= -.9343x + 61.543$
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2 multiple choice 1.25 points the statistics shown below are of the fin…
D. $\hat{y}=5.412x + 53.558$
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identify independent and dependent variables in tables and graphs which…
a) t is the independent variable, and m is the dependent variable. b) 1/100 of
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13. a science class counted how many insects they observed in different…
a) 9.56 b) 9 c) 7 d) 8
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12. the table shows the number of hours students studied for a test: st…
a) 3 b) 3 c) 3 d) 4