Statistics & Probability
Data analysis, probability distributions, hypothesis testing, and statistical methods.
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migraine headaches a study found that the mean number of days per month…
\(0.34\)
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a researcher studying frogs is investigating the distance that a certai…
a) \(0.16\) b) \(66\) and \(114\) c) \(0.025\)
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what does the central limit theorem say about the shape of the distribu…
C. The distribution will be approximately normal when the sample size is large.
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what is the standard deviation of the sample means called? what is the …
The standard error of the mean: $\frac{\sigma}{\sqrt{n}}$
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what is the mean of the sample means? the mean of the sample means is e…
The mean of the sample means is equal to the population mean.
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heights of 10 year old children, regardless of sex, closely follow a no…
a) \(0.1003\) b) \(0.3300\) c) \(0.5146\) d) \(59.09\)
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using the boxplot, find the following. identify the maximum value, mini…
Maximum value \(=32\), Minimum value \(=7\), Median \(=22\), First quartile \(=12\), Third quartile \(=27\)
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question 3 of 10 what is most likely true of the audience for james gre…
C. Many of them have similar values to Green's about gender roles and family structure.
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find the interquartile range. round your answer to one decimal place as…
\(237.5\)
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if 15% of adults in a certain country work from home, what is the proba…
\(0.0260\)
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question 32 a________chart is used to visualize trends over time. pie l…
line
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which score indicates the highest relative position? round your answer …
A score of 3.2 on a test with $\overline{X}=4.1$ and $s = 1.4$: $z=\frac{3.2 - 4.1}{1.4}=\frac{- 0.9}{1.4}\approx - 0.64$ A score of 630 on a test with $\overline{X}=760$ and $s =…
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which score indicates the highest relative position? round your answer …
(c), \( z = -2.00 \)
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to be considered for pilot school, 12 students took a spatial reasoning…
\(145\)
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to be considered for pilot school, 12 students took a spatial reasoning…
25th percentile
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the boxplot represents concert tickets sold on random days for a local …
297 and 369 (the fourth option)
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question 59 (1 point) listen if the foreign currency value of ones own …
One needs more of one's currency to buy foreign currency
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a silent auction was held for a quilt donated for charity. fifteen bids…
\(155\) (the fourth option)
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identify all values, if any, in the data set that would be considered o…
no outliers
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the boxplot displays the scores from an economics chapter test. identif…
80
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question 9 of 10 read this passage: one should admit at the outset to a…
C. People who don't agree with the author's ideas about nature
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in a cooking contest, the mean score for taste was 20, with a standard …
-2.14; unusual
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a sample data set has a mean of 122.3 and a standard deviation of 18.5.…
C. 2.49; unusual
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pizza delivery the average time it takes to get a pizza delivered to a …
$0.43$
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question 50 (1 point) the difference between foreign direct investment …
A. FDI is investing more in fixed assets (companies and real estate), as opposed stocks and bonds (which is portfolio investment)
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pizza delivery the average time it takes to get a pizza delivered to a …
-1.29
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pizza delivery the average time it takes to get a pizza delivered to a …
$-0.71$
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fast-food expenditures the average person, according to one source, spe…
- \( -0.75 \)
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fast-food expenditures the average person, according to one source, spe…
$-1.67$
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business weekly conducted a survey of graduates from 30 top mba program…
The probability that a single randomly selected salary is at most \(164000\) dollars is \(0.5383\). The probability that a sample of size \(n = 75\) is randomly selected with a me…
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what is the main difference between a felony and a misdemeanor? a. a fe…
A. A felony is the most serious type of crime, whereas a misdemeanor is a less serious offense.
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question 17 (1 point) listen in a socialist system: countries try to be…
The state owns and controls key means of production.
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suppose the time it takes my daugther, lizzie, to eat an apple is unifo…
c. \(0.3286\) d. \(0.6857\) e. \(0.3143\)
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time spent online americans spend an average of 3 hours per day online.…
69 and 291
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fire calls the frequency distribution shows the number of fire calls pe…
Variance \( = 9.8\), Standard deviation \(=3.1\)
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algebra || khan academy share questions 1 & 2 00:34 questions 3 & 4 01:…
3. True 4. True
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ages of hospital patients the frequency distribution shows the ages of …
The mean is \(44.0\) and the modal class is \(46 - 54\)
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please select the word from the list that best fits the definition an o…
political party
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question 19 5 pts tanzimat modern reforms meant to help the ottomans ca…
modern reforms meant to help the ottoman's catch up to the europeans
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question 17 (2.5 points) the difference between results obtained from a…
sampling error
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please select the word from the list that best fits the definition redi…
transfer payments
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question 14 (2.5 points) after rigorous statistical analyses have shown…
statistically significant
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a(n)________is someone who investigates social problems, collects the s…
C. social - welfare researcher
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can observations/data be both qualitative or quantitative? no yes volve…
no
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classify (√7)·(3) as rational or irrational, and explain your reasoning…
C. Suppose an irrational times a nonzero rational = rational, then irrational=\(\frac{\text{rational}}{\text{rational}}\). This means irrational = rational, which is a contradicti…
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a doctors office has five doctors. this morning, 20 patients visited th…
| Doctor | Frequency | | ---- | ---- | | \(F\) | \(3\) | | \(M\) | \(4\) | | \(P\) | \(5\) | | \(T\) | \(3\) | | \(W\) | \(5\) |
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a certain store sells t - shirts in 4 colors. the number of t - shirts …
(a) A. black, 11 T - shirts sold (b) \(11-6 = 5\) more T - shirts sold (c) 3 colors
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interpreting a bar graph a hardware company has sales agents in 5 state…
(a) Indiana, 12 (b) \(9 - 4=5\) (c) 2
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a drug trial had 278 participants. a survey was taken to determine how …
(a) $147$ participants (b) $231$ participants (c) $200$ participants
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here are the ages (in years) of 8 professors at a college. 61, 42, 61, …
\(50\%\)
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the numbers of students in the 8 schools in a district are given below.…
(a) It decreases by $26$. (b) It decreases by $14.5$.
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in a study of pain relievers, 100 people were given product a, and all …
Product B performed worse in the study. That is because \(48\%\) failed to get relief with this product, whereas only \(35\%\) failed to get relief with Product A.
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goran is taking a self - paced math class. his scores for each of the 1…
| Quiz score | Relative frequency | |--|--| | \(79 - 83\) | \(0.06\) | | \(84 - 88\) | \(0.29\) | | \(89 - 93\) | \(0.24\) | | \(94 - 98\) | \(0.41\) |
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felipe is participating in a 5 - day cross - country biking challenge. …
49
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1 what is the main idea of the fair labor standards act (flsa) that sta…
1. B. It set a rule for how long the regular workweek should be. 2. B. They earned extra money, called overtime pay. 3. (Assuming the full name is the Fair Labor Standards Act, bu…
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(d) experiment 4: a bag contains numbered marbles. a marble is randomly…
- (d) Independent - (e) Dependent
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(a) experiment 1: a coin is flipped. then a number cube with sides labe…
- (a) Independent - (b) Independent - (c) Dependent
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(d) experiment 4: a box contains pens. some pens have ink and some do n…
(d) Dependent (e) Independent
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(a) experiment 1: a litter of puppies consists of black puppies and whi…
(a) Dependent (b) Dependent (c) Independent
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the accompanying data set lists diastolic blood pressure measurements (…
\(72\) and \(74\)
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a box has three cards numbered 1, 2, and 3. a bag has three balls label…
Sample space: $\{1A,1B,1C,2A,2B,2C,3A,3B,3C\}$ Event that the letter chosen is $C$: $\{1C,2C,3C\}$
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an arborist examined trees in an orchard to see if they were infected w…
\(5\%\)
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read the excerpt from the declaration of independence. then, answer eac…
A. They are created that way.
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the height of a building is proportional to the number of floors. the f…
The ratio of height of the building to the number of floors is \(\frac{104}{8}\). The unit rate is \(\frac{13}{1}\). This means that each floor of the building is \(13\) ft high.
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write a system of equations to describe the situation below, solve usin…
\(9\) pages, it would cost \(\$45\).
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based on the nuance in the sentence below, what does gracious mean? his…
B. well mannered
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a box has three cards numbered 1, 2, and 3. a bag has three balls label…
Sample space: 1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3C Event that the letter chosen is C: 1C, 2C, 3C
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(c) experiment 3: a deck contains 8 cards labeled 1 through 8. a card i…
(c) Independent (d) Dependent (e) Independent
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(a) experiment 1: a hat contains slips of paper with the names of boys …
(a) Independent (b) Dependent
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for many years, a large book publisher has published an expansive serie…
- Population variance: \(\sigma^{2}=1024\) pages\(^{2}\) - Sample mean: \(\bar{x} = 152\) pages - Sample variance: \(s^{2}=1369\) pages\(^{2}\)
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a document issued by the legal arm of a large commercial airline states…
Population mean: $\mu = 3466$ hours Population standard deviation: $\sigma = 839$ hours Sample mean: $\bar{x}=3342$ hours
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an amusement park conducted an internal audit on the wait times of its …
Population mean: $\mu = 31.2$ minutes Sample mean: $\bar{x} = 33.1$ minutes Sample standard deviation: $s = 2.3$ minutes
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for many years, a large book publisher has published an expansive serie…
Population mean: $\mu = 149$ pages Population standard deviation: $\sigma = 29$ pages Sample mean: $\bar{x}=143$ pages
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what does focus mean? making a plan to do something to concentrate on s…
To concentrate on something and paying attention to it
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a box has four cards numbered 1, 2, 3, and 4. maya will toss a coin onc…
Sample space: \(H1,H2,H3,H4,T1,T2,T3,T4\) Event that the coin toss is tails: \(T1,T2,T3,T4\)
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true or false? quantitative data is expressed in numbers and is based o…
TRUE
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a coin will be tossed twice, and each toss will be recorded as heads (h…
Sample space: \(HH, HT, TH, TT\) Event that the first toss is tails: \(TH, TT\)
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which of these statements is false? qualitative data are descriptions i…
Qualitative data include numbers.
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a coin will be tossed three times, and each toss will be recorded as he…
Sample space: \(HHH, HHT, HTH, HTT, THH, THT, TTH, TTT\) Event that the third toss is heads: \(HHH, HTH, THH, TTH\)
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what does it mean to find out \what makes you tick\? identify what moti…
Identify what motivates you and why you behave a certain way
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a box has four cards numbered 1, 2, 3, and 4. trey will toss a coin onc…
Sample space: \(H1,H2,H3,H4,T1,T2,T3,T4\) Event that the number chosen is \(1\): \(H1,T1\)
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a box has four cards numbered 1, 2, 3, and 4. trey will toss a coin onc…
Sample space: \(H1,H2,H3,H4,T1,T2,T3,T4\) Event that the number chosen is 1: \(H1,T1\)
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sample standard deviation the following are distances (in miles) travel…
$11.93$
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trevors city took a telephone poll about a plan to build a new hotel do…
\(7\%\)
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below are the times (in days) it takes for a sample of 5 customers from…
$9.43$
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a team of students lined up dominoes on the gym floor. 550 dominoes fel…
\(88\%\)
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a factory made 15 jars of creamy peanut butter and 110 jars of chunky p…
\(12\%\)
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using the graph of a distribution to find probabilities: basic a real n…
(a) \(0.6\) (b) \(0.75\)
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at a school carnival, 34 out of 85 tickets sold were early - admission …
$40\%$
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at the craft store, ashley bought a bag of purple and yellow marbles. s…
$50\%$
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a real number between 1 and 11 will be picked according to the probabil…
(a) \(0.60\) (b) \(0.90\)
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sleep disorders a survey finds that 20% of americans suffer from a slee…
\(0.137\)
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sleep disorders a survey finds that 20% of americans suffer from a slee…
\(0.284\)
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identify the distribution as symmetric, left - skewed, or right - skewe…
A. Left - skewed
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based on the nuance in the sentence below, what does timorous mean? the…
timid
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the test scores of 32 students are listed below. construct a boxplot fo…
A.
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the test scores of 32 students are listed below. construct a boxplot fo…
A.
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a bag with 8 marbles has 2 blue marbles, 3 red marbles, and 3 yellow ma…
\(\frac{5}{8}\)
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use the range rule of thumb to approximate the standard deviation of th…
C. 11.5
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find the standard deviation for the given data. round to one more decim…
C. 2.5