For problem #1-3, use the following frequency table showing the result of a medical test and whether or not a person has the condition for which they are being tested.

Result of test

Positive Negative

Yes 75 5

Condition Present in Person

No 10 60

1. What percentage of people test negative or have the condition?

A) 50%

B) 3.33%

C) .03%

D) None of the above

2. What percentage of people who do not have the condition test negative?

A) 85.71%

B) 92.31%

C) 40%

D) None of the above%

3. What is the probability that a randomly selected person from the table will have the condition?

A) 85/150

B) 75/150

C) 1

D) .5333

4. Recently, the J & J vaccine was paused because 6 women had blood clots out of 6.85 million people who had taken the vaccine.Which of the following statements is true?

A) The probability of a clot is theoretical

B) The probability of a clot is fairly likely

C) These numbers came from an experiment

D) The information is observational and cannot be used alone to determine cause and effect

5. For a standard normal distribution, what is the probability that z is less than -2.57?

A) .5

B) .0051

C) .9949

D) It depends on the degrees of freedom

6. What would be the rejection point (R.R.) for a right-tailed z test at = .01?

A)2.575

B)1.96

C)-2.33

D)2.33

7. In hypothesis testing, what is the probability of a Type I Error?

A)

B) s

C) The p-value

D) None of the above

8. Which of the following would make a narrower confidence interval?

A) Smaller n

B) Lower level of confidence

C) Largers

D) All of the above

9. Which of the following is NOT a statistical inference?

A) Estimating a true parameter in a population

B) Testing a claim about a parameter in a population

C) Making judgements about the population based on information in the sample

D) Wondering if Pringles will ever accept the UPS man

10. What is a p-value?

A) A probability

B) The given level of significance of the test

C) How likely the R.R. is

D) All of the above