Statistics & Probability
Data analysis, probability distributions, hypothesis testing, and statistical methods.
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in a random sample of six cell phones, the mean full retail price was $…
\(345.8\)
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in a random sample of six cell phones, the mean full retail price was $…
\(346.8\)
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in a random sample of 20 people, the mean commute time to work was 30.7…
D. With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval.
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in a random sample of 20 people, the mean commute time to work was 30.7…
The margin of error of \(\mu\) is \(2.8\)
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in a random sample of 20 people, the mean commute time to work was 30.7…
The confidence interval for the population mean \(\mu\) is \((28.0,33.5)\)
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construct the indicated confidence interval for the population mean μ u…
\((12.7,13.1)\)
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find the margin of error for the given values of c, s, and n. c = 0.98,…
\(2.574\)
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define what competition is and what the origins of the word mean.
Competition is a situation where individuals or groups strive against each other for a common goal. The word "competition" comes from the Latin word "competere," meaning "to striv…
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the following list gives the number of pets for each of 12 students. 3,…
\(0,2,4\)
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four distributions, labeled (a), (b), (c), and (d) are represented belo…
\(\mu_{c}<\mu_{a}<\mu_{b}<\mu_{d}\)
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at a tv assembling facility, the quality assurance (qa) department test…
- (a) - Population: All \(5923\) TVs assembled in March - Sample: The \(400\) TVs that were randomly selected and tested - (b) - The \(8\) TVs of the random selection of \(400\) T…
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a decade - old study found that the proportion, p, of high school senio…
(a) \(H_0:p = 0.7\), \(H_1:p eq0.7\) (b) \(z\) - test statistic (c) \(z\approx0.531\) (d) \(p - value\approx0.596\) (e) No, we cannot conclude that the proportion of high school …
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the scatter plot shows the number of hours worked and money spent on en…
- (a) increase - (b) a positive - (c) 30 (This is an estimate. The actual value may vary slightly depending on the precise reading from the scatter - plot's line of best fit)
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northside high wants to estimate the number of seniors who plan to go t…
(a) 20 seniors are randomly selected; 15 plan to go to a 4 - year college. (b) 375 seniors
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the salaries of the employees at four companies are summarized below. a…
(a) Company C (b) Company A
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the following is a list of 15 measurements. -79, 37, 13, 42, 93, -34, 5…
\(5775\)
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scott wants to find the average time it takes lincoln high school stude…
(a) seconds, minutes (b) Randomly pick 24 students to run a lap around the track and measure their times.
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the 10 members of the swim team completed the following numbers of laps…
a. \(Q_1 = 77\), \(Q_3 = 89\) b. \(IQR = 12\) c. Lower boundary: \(59\), Upper boundary: \(107\)
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(b) find the interquartile range (iqr) of the data set. (c) calculate a…
None
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here are the scores of 12 students on a science test. 61, 64, 68, 72, 7…
(a) Median: \(76\) (b) Lower quartile: \(70\) (c) Upper quartile: \(82\)
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(a) which histogram is the closest to being symmetric? histogram a hist…
(a) Histogram A (b) Histogram C (c) Histogram A (d) Histogram B
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find the margin of error for the given values of c, s, and n. c = 0.80,…
\(2.722\)
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find the critical value $t_{c}$ for the confidence level $c = 0.95$ and…
\(t_{c}=2.056\)
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2. a student takes a 20 question test and has an 80% chance of getting …
A. \(P(X = 18)\approx0.1369\) B. \(P(X\leq15)\approx0.093\) C. \(P(X\geq17)\approx0.6888\) D. \(P(X = 20)\approx0.0115\) E. \(P(X\lt18)\approx0.5814\) F. \(P(X\gt10)\approx0.9999\)
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1. a baseball player has 10 at bats in a series and has a 30% chance of…
A. \(P(X = 2)\approx0.2335\) B. \(P(X<4)\approx0.6496\) C. \(P(X>2)\approx0.6172\) D. \(P(X = 0)\approx0.0282\) E. \(P(X<3)\approx0.3828\) F. \(P(X\geq6)\approx0.0475\)
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5. you flip a fair coin 8 times. let ( x = ) the number of tails that c…
A. \(\frac{35}{128}\) B. \(\frac{9}{256}\) C. \(\frac{93}{256}\) D. \(\frac{1}{256}\) E. \(\frac{219}{256}\) F. \(\frac{9}{256}\)
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4. patrick mahomes completes 70% of his pass attempts. assume he tries …
A. \(P(X = 10)\approx0.206\) B. \(P(X<8)\approx0.103\) C. \(P(X>14)\approx0.0047\) D. \(P(X = 12)\approx0.170\) E. \(P(X<13)\approx0.874\) F. \(P(X\geq12)\approx0.296\)
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question a company manufactures and sells shirts. the daily profit the …
\( f(-2)=-82 \), interpretation: If the company sells \(-2\) shirts (not practical), profit is \(-82\) dollars. \( f(12)=2 \), interpretation: If the company sells \(12\) shirts, …
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kurdish population distribution sources: britannica, australian broadca…
B. The Kurdish people, seeking a state of their own with a majority Kurdish population, might secede from or rebel against the states labeled on the map.
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find the area of the shaded region. the graph depicts the standard norm…
\(0.2327\)
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determine whether the following graph can represent a variable with a n…
D. Yes, the graph fulfills the properties of the normal distribution.
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determine whether the following graph can represent a variable with a n…
D. Yes, the graph fulfills the properties of the normal distribution. The mean is approximately 23 and the standard deviation is about 5.
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determine whether the following graph can represent a variable with a n…
D. No, because the graph crosses the x - axis.
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determine whether the following graph can represent a variable with a n…
D. No, because the graph crosses the \(x -\)axis.
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multiple choice question a good source for free, credible cost informat…
the Bureau of Labor Statistics
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you stay up for days preloading the machine with an exhaustive, explici…
denotative
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claim has the same or almost the same meaning as: assertion invention m…
assertion
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option has the same or almost the same meaning as: acquisition muster c…
C. choice
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\we analyze the tape with them and have them repeat it several times to…
break down into components or essential features
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amendment 3 no quarter of soldiers during peacetime amendment 4 • no un…
- Amendment 4: searches - Amendment 5: jeopardy; Due Process - Amendment 7: jury - Amendment 8: cruel - Amendment 9: rights
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two college students, chris and angie, each survey a random sample of p…
The sampling distribution based on samples of \(n = 150\) will have more variability.
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at a large university, it is reported that 46% of all students bring a …
0.0166
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bonnie is one of 60 students enrolled in a political science course. ea…
0.0175
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when students register for a popular course at a particular university,…
None of the above statements is true.
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a group of biologists study a population of squirrels in order to estim…
Because probabilities cannot be greater than 1 or negative, 0.82 is a legitimate probability.
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question 4 1 pts return again to the information presented in question …
0.0227
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question 2 1 pts it is reported that 28% of all adults own at least one…
0.258 and 0.302
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question 2 it is reported that 28% of all adults own at least one house…
0.258 and 0.302
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it is reported that 28% of all adults own at least one houseplant. imag…
0.258 and 0.302
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a group of 6 students was asked, \how many hours did you watch televisi…
(a) Median: \(17\) hours (b) Mean: \(14.2\) hours
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here are the shopping times (in minutes) for each of fifteen shoppers a…
| Shopping times (in minutes) | Frequency | |-----------------------------|-----------| | \(18 - 22\) | \(5\) | | \(23 - 27\) | \(4\) | | \(28 - 32\) | \(2\) | | \(33 - 37\) | \(4…
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the table and scatter plot show the time spent texting, x, and the time…
| Time spent texting (in hours)| Observed time spent exercising (in hours)| Predicted time spent exercising (in hours)| Residual (in hours)| |---|---|---|---| | \(4.0\)|\(4.50\)|\…
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1 what is the difference between a memoir and reflective writing? a mem…
A. A memoir is only about someone's personal past, while a reflective essay can be on any subject.
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select the correct answer and press the submit button. in this excerpt,…
B. water that comes through pipes in a house
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question 46 (2 points) audience analysis is the process of determining …
learning about the audience's interests and backgrounds.
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question 42 (2 points) what does it mean to front - load your main mess…
Present your main message early in the speech.
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what is the median? 88 81 77 92 89 87 83
87
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what is the range? 96 97 97 79 89 100 92
\( 21 \)
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levi checked the floor plan of 6 rooms in the school dormitory. they me…
\(88\)
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a television commercial compared monthly car insurance prices offered b…
\( 8.00 \)
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tyrone weighed 10 blocks of unknown materials for a science experiment.…
$18$
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what is the mean? if the answer is a decimal, round it to the nearest t…
$30.6$
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what is the mode? 79 85 79 84 79 84
\(79\)
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stefan recorded the high temperature on 6 summer days. the temperatures…
\(95\)
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wayne earned pocket money by recycling cans and bottles on 6 occasions.…
\(50\)
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sasha weeded the neighbors gardens all summer. the 9 neighbors paid: $4…
\( 4 \)
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bob is tracking the amount of time he works out at the gym each day. th…
\(41\)
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sixth grade > 11.2 calculate mean, median, mode, and range 27% what is …
\(6\)
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what is the median? 6 9 6 9 0 6 1 9 4
\(6\)
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question 21 (2 points) which statement about gender stereotypes is alwa…
They are oversimplified views about different gender groups.
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what is the range? 5 0 0 8 1 3 1 7
\(8\)
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question 12 (2 points) which is the best example of an ad hominem (pers…
You're nothing but a fearmongering and paranoid war hawk!
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question 3 (2 points) narratives are commonly used to ○ stimulate liste…
stimulate listeners' interest.
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question 2 (2 points) to help audience members remember your presentati…
hooks for ideas you present.
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sixth grade > 11.2 calculate mean, median, mode, and range zzk what is …
\(9\)
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elizabeth checked the hit counters of 7 websites to track how many peop…
\(4\)
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sixth grade > 11.2 calculate mean, median, mode, and range zzk what is …
\(1\)
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sixth grade > j1.2 calculate mean, median, mode, and range zzk what is …
\(5\)
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rosa placed 8 students backpacks on a scale. they weighed: 4 pounds 1 p…
3
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lena measured the dolls in her doll collection so she could build a new…
\(4\)
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jenny watched the cashier scan the 7 items in her shopping cart. the sc…
\( \$6.00 \)
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as part of a research experiment, a chemist is weighing 7 samples. the …
\(3\)
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seaside university offers five applied majors and monitors the number o…
industrial design, mechanical engineering, computer science, civil engineering, electronics
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a group of friends took a poll about their favorite cities. favorite ci…
$6$
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a plant nursery in middletown keeps records of how many of its plants a…
25
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let ( f(t) ) be the fuel consumption in billions of gallons in ( t ) ye…
173.6 billions of gallons; 2010
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a real estate agent evaluated the number of houses sold this year in ea…
192
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the members of a seventh - grade class completed a survey about their f…
glazed, coconut, cream - filled
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a fisherman recorded the weight of his catch, broken down by type of fi…
14
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this morning, mr. massey released the scores from last weeks spelling t…
71 - 80 points
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for a social studies project, trent counted the number of classrooms in…
\(0 - 4\) classrooms
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the architecture student counted the number of bricks in each building …
\(320\)
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for a science fair project, ian tracked the temperature each day. daily…
\(79\)
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lena collected the following data: plants per garden 47 12 60 15 24 47 …
El primer histograma es el correcto.
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provide an appropriate response. use the standard normal table to find …
C. 0.0918
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a local real estate company has 6 real estate agents. the number of hou…
(a) Kenji, 1 house(s) (b) 6 more house(s) (c) 6 agent(s)
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the following data represent the number of drivers involved in a fatal …
\(0.273\)
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classify $(sqrt{5}+\frac{1}{5})$ as rational or irrational, and explain…
C. Suppose an irrational + rational = rational, then irrational = rational - rational. This means irrational = rational, which is a contradiction. Thus the irrational number \(\sq…
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read the line from grendel. i was safe in my tree, and the men who foug…
first - person narrative showing Grendel’s perspective.
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read the following sentences: at first people were afraid to speak out …
a government controlled by one person