Question
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
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
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