1) Problem #PRAF6V3 "PRAF6V3 - 175484 - On an assembly li..." |
A)
On an assembly line of Acme Radio, the probability that a radio is defective is 1/15. If an inspector randomly checks 10 items, what is the probability of finding exactly 2 defective. rlound to the nearst hundreth. |
Multiple Choice:
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B)
On an assembly line of Acme Radio, the probability that a radio is defective is 1/15. If an inspector randomly checks 10 items, what is the probability of finding no more than 2 defective. Round to the nearest hundreth. |
Algebraic Expression:
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C)
On an assembly line of Acme Radio, the probability that a radio is defective is 1/15. If an inspector randomly checks 10 items, what is the probability of finding at least 3 defective. Round to the nearest hundreth |
Algebraic Expression:
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2) Problem #PRA96H "PRA96H - 29674 - Problem 2 of 7 &n..." |
Problem 2 of 7 A particular psychological test is used to measure academic motivation. The average test score for all university students nationwide is 115. A university in the south of the country estimates the mean test score for students in its economic faculty by testing a random sample of n students and constructing a confidence interval based on their scores. Which of the following statements about the confidence interval are true? Check all that apply. |
Check All That Apply:
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3) Problem #PRAF7E5 "PRAF7E5 - 176013 - Jake is rolling a..." |
A)
Jake is rolling a die for a boardgame. The probabilty that Jake rolls a 6 is .17. What is the probabilty that he rolls a 6 three times? |
Multiple Choice:
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B)
What is the probabilty that he rolls an even number? |
Multiple Choice:
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C)
What is the probabilty that he gets even results four times in a row? Round to the nearest thousandth! |
Algebraic Expression:
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4) Problem #PRAF7E2 "PRAF7E2 - 176010 - Timothy did not s..." |
A)
Timothy did not study for his math test. He estimates that the probability that he gets a question right is .65. What is the probability that he will score correctly on his first 3 questions? |
Multiple Choice:
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B)
What is the probability that he gets just the first two questions right? |
Multiple Choice:
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5) Problem #PRAF7FF "PRAF7FF - 176023 - Macie is doing an..." |
A)
Macie is doing an experiment in her stats class involving coins. She decides to flip a fair coin 100 times to find the probability of getting heads two flips in a row.What is the Probability of her getting heads twice in a row? |
Algebraic Expression:
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B)
What is the probability of her getting one head and one tail? |
Algebraic Expression:
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C)
Is the probability of Macie getting one head and one tail an independent event? Yes or No? |
Algebraic Expression:
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D)
What is the probability of her getting tails 5 times in a row? Round to the nearest thousandth. |
Algebraic Expression:
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E)
What is the probability of Macie not getting any tails our of seven flips? Round to the nearest thousandth. |
Algebraic Expression:
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6) Problem #PRAF7E7 "PRAF7E7 - 176015 - Suppose you have ..." |
A)
Suppose you have a bag of cards with numbers in them. There are 20 cards in the bag, and they range from 1-20. what is the probability of picking a card out of the bag that is an even number? Round to the nearest whole number. |
Algebraic Expression:
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B)
what is the probability of drawing an odd card on the first draw? |
Algebraic Expression:
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7) Problem #PRA96F "PRA96F - 29672 - Problem 4 of..." |
Problem 4 of 7 We would like to know the average amount of time students spend studying for their classes each week. A random sample of 20 students are surveyed. They report spending an average of 7.6 hours studying, with s = 1.2 hours. Based on these data, find a 95% confidence interval for the average amount of time a student studies for classes each week. You may assume that distribution of the time students spend is approximately normal. Please round to two decimal places. |
Multiple Choice:
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8) Problem #PRAF6VW "PRAF6VW - 175479 - Find the expected..." |
A)
Find the expected value of this data set:
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Exact Match (case sensitive):
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B)
What is the variance? |
Exact Match (case sensitive):
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C)
What is the standard deviation? |
Exact Match (case sensitive):
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9) Problem #PRAF6XF "PRAF6XF - 175527 - Find the mean of ..." |
A)
Find the mean of the data set:
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Algebraic Expression:
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B)
Find the variance |
Exact Match (case sensitive):
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C)
Find the standard deviation |
Exact Match (case sensitive):
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10) Problem #PRAF6W8 "PRAF6W8 - Prob 3" |
You are drawing from a deck of playing cards. You draw twice, not replacing the cards after each draw. What is the probability of drawing a queen on the first draw and a king on the second draw? Round your answer to the hundredths place. |
Algebraic Expression:
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11) Problem #PRAF6W9 "PRAF6W9 - Prob 4" |
You have a bag of cloths. In the bag, there are 4 striped cloths, 2 black cloths, 3 white cloths, and 5 dotted cloths. If you pull one cloth from the bag out at random, what is the probability of getting a striped or dotted cloth? Round your answer to the hundreths place. |
Algebraic Expression:
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12) Problem #PRAF6UP "PRAF6UP - 175441 - A continuous rand..." |
A)
A continuous random variable has |
Multiple Choice:
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B)
A discrete random variable has |
Multiple Choice:
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C) |
Algebraic Expression: |
13) Problem #PRAF8AP "PRAF8AP - 176836 - n = 200 p = .13 I..." |
A)
n = 200 p = .13 Is the sample normally distributed? Does it meet the requirements? |
Multiple Choice:
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B)
Given that the sample is normally distributed with a sample size of 200 and a p of .13, what is the mean of the poplulation? |
Multiple Choice:
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C)
Now that you have the mean, what is the standard deviation? |
Multiple Choice:
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D)
What two requirements must be met for a sample to be normally distributed? |
Multiple Choice:
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E)
In X ~ N (n x p, √n x p x q), what is X a random variable for? |
Multiple Choice:
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14) Problem #PRAF8A3 "PRAF8A3 - 176848 - For boys, the ave..." |
For boys, the average number of absences in the third grade is 15 with a standard deviation of 7; for girls, the average number of absences is 10 with a standard deviation of 6. In an international survey, suppose 100 boys and 50 girls are sampled. What is the probability that the male sample will have at most three more days of absences than the female sample? Disregard percent sign |
Algebraic Expression:
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Hints: |
The z-score would be -1.8 |
15) Problem #PRAF8A4 "PRAF8A4 - 176849 - Meg earned a..." |
Meg earned a score of 940 on a national achievement test. The mean test score was 850 with a standard deviation of 100. What is the probability of students had a higher score than Meg? |
Algebraic Expression:
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16) Problem #PRAF6YM "PRAF6YM - 175563 - In the U.S...." |
In the U.S. suppose 62% of high school graduates go directly to college. Suppose that 3000 high school seniors were surveyed on whether or not they are going to college. What are the chances that at least 1867 are going to college? Round answers to the nearest hundredths place. |
Algebraic Expression:
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17) Problem #PRAF65P "PRAF65P - 175720 - If among 10 child..." |
A)
If among 10 children the probability of getting sick is .35. Use the binomial formula to find the probability that at most 3 will get sick. round answers to the nearest hundredth place. |
Algebraic Expression:
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B)
From the previous problem what is the mean? |
Algebraic Expression:
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C)
What is the standard deviation? |
Algebraic Expression:
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18) Problem #PRAF6UN "PRAF6UN - aprilproject_1" |
Residual = _______ - _______ ...? |
Multiple Choice:
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19) Problem #PRAF8AT "PRAF8AT - aprilproject_3" |
In order to create a linear regression model on your calculatorm you must first enter your data. What method would you use on your calculator to enter this data? |
Multiple Choice:
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20) Problem #PRAF8AV "PRAF8AV - 176842 - In linear regress..." |
In linear regression, data are modeled using ________functions and unknown model ______________ are estimated from the data. |
Multiple Choice:
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21) Problem #PRAF6U9 "PRAF6U9 - 175459 - Lebron Jam..." |
Lebron James cries after every NBA game that he loses 76% of the time. What is the probaility that after 4 losses in a row, he goes tearless until that final fourth game? Round to the nearest hundredth. |
Algebraic Expression:
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22) Problem #PRAF6U4 "PRAF6U4 - 175454 - Dylan's love for ..." |
Dylan's love for Canadian bacon makes him go out and question what percentage of other people love it as well. He finds that 37% of the people surveyed enjoy it. What is the probability that it takes more than 3 people until he finds someone who likes Canadian bacon? Round to the nearest hundredth. |
Algebraic Expression:
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23) Problem #PRAF6UX "PRAF6UX - 175449 - Kristin has a cer..." |
Kristin has a certain nickname Renaynay. The probability that Dana calls her that name on a given day is 47%. What is the probability that he calls her Renaynay after 7 days of letting her off the hook? Round to the nearest hundredth. |
Algebraic Expression:
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