STATISTICS 101 STUDY.COM 2024/2025 WITH ACCURATE ANSWERS

STATISTICS 101 STUDY.COM 2024/2025
WITH ACCURATE ANSWERS

,STATISTICS 101 STUDY.COM 2024/2025
WITH ACCURATE ANSWERS
Which of the following is FALSE regarding the binomial probability distribution?



a) It is a mathematical construct that is used to model the probability of observing r successes in n trials.

b) It is the most often used discrete probability distribution in statistics.

c) It is calculated based on a formula where p is the significance level for a single event and q is the
quantity of data present.

d) None of the answers are correct. - CORRECT ANSWERSc) It is calculated based on a formula where p is
the significance level for a single event and q is the quantity of data present.



A bag has 5 blue pens, 2 red pens, 2 green pens and 1 yellow pen. What is the probability of drawing 2
successive red pens?

1/5

1/45

1/90

2/15 - CORRECT ANSWERS1/45



You're rolling a 20-sided die where each side shows a number from 1-20. For which of the following is it
probable that the probability will be 1:4?

a) That you will roll a 2

b) That you will roll two consecutive odd numbers

c) That you will roll three consecutive odd numbers

d) That you will roll two dice and the result will be 4 - CORRECT ANSWERSb) That you will roll two
consecutive odd numbers



C is the result of the intersect of A and B. If C= {1,3,6}, which of the following are A and B?

a) A = {1,3,4,5,6} and B = {-1,-2,-3,-4}

b) A = {1,3} and B = {6}

,c) A = {1,3,7,8,10} and B = {1,3,6}

d) A = {1,2,3,6,8} and B = {0,1,3,6,9} - CORRECT ANSWERSd) A = {1,2,3,6,8} and B = {0,1,3,6,9}



You're drawing a card from a standard deck with 52 cards. For which of the following is your probability
of drawing this card 2:13?

a) It's the probability of drawing a king.

b) It's the probability of drawing a jack or a ten.

c) It's the probability of drawing a jack, ten or a queen.

d) It's the probability of drawing a jack, ten, a queen or a king. - CORRECT ANSWERSb) It's the probability
of drawing a jack or a ten.



On a 20-sided die, each side shows a number from 1-20. What is the probability that the sum of the
numbers shown will be 6 when rolling two?

a) 1/80

b) 1/6

c) 395/400

d) 1/400 - CORRECT ANSWERSa) 1/80



What is the value of alpha for a 90% confidence interval?

a) 0.01

b) 0.10

c) 0.05

d) 0.25 - CORRECT ANSWERSb) 0.10



Suppose that you take 160 simple random samples from a population and that, for each sample, you
obtain an 85% confidence interval for an unknown parameter. Approximately how many of those
confidence intervals will contain the value of the unknown parameter?

a) 136

b) 155

c) 100

, d) 128 - CORRECT ANSWERSa) 136



Suppose that you take 500 simple random samples from a population and that, for each sample, you
obtain a confidence interval for an unknown parameter. You expect 475 of the confidence intervals to
actually contain the value of the unknown parameter. What was the confidence interval you calculated?

a) 95%

b) 90%

c) 85%

d) 80% - CORRECT ANSWERSa) 95%



Which of the following uses a sample statistic?

a) Confidence interval

b) Parameter

c) Both of these are correct.

d) Neither of these is correct. - CORRECT ANSWERSc) Both of these are correct.



What is game theory?

a) A theory on how many hours teenagers spend on games

b) A theory on how gaming works

c) A field of math used to guide logical decision making

d) The expectation of what will happen in any given event - CORRECT ANSWERSc) A field of math used to
guide logical decision making



Joseph asks 20 people in his math class if they are comfortable with using technology. Seven out of the
20 say they are comfortable with using technology. Calculate the theoretical and the actual probability
of this scenario.

a) Theoretical: 50%

Actual: 35%

b) Theoretical: 70%

Actual: 50%