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Sample MC Questions
Vocabulary
Probability and Error
Inference
Who said what & where
100

Which of the following distributions are likely to be skewed to the right? I. Number of selfies taken per week II. Home prices III. Ages of teenage drivers

What is I and II

100
A method of data collection that involves separating samples into different strata based on covariate characteristics.
What is stratified sampling
100
A student reasons that he will or will not receive a 5 on the AP Statistics Exam, and therefore the probability of receiving a 5 is .50. Why is this incorrect reasoning?
The events are not equally probable.
100
df= (r-1) (c-1)
What is the formula for degrees of freedom when conducting a chi square test for independence.
100

Hi everyone, I’m ______________________ and I like warm hugs

Olaf, Frozen

200

Which of the following are true statements? I. All symmetric histograms have single peaks II. All symmetric bell-shaped curves are normal III. All normal curves are bell-shaped and symmetric

What is III only

200
A method of sampling in which the researcher divides the population into separate groups, then a simple random sample of groups is selected from the population.
What is cluster sampling
200
According to a CBS poll taken in 1992, 15% of the public have responded to a telephone call-in poll. In a random group of five people, what is the probability that exactly two have responded to a call-in poll?
What is .138
200
A geneticist claims that four species of fruit flies should appear in the ratio 1:3:3:9. Suppose that a sample of 2000 flies contained 110,345,360, and 1185 flies of each species. Is there sufficient evidence to reject the geneticist's claim?
The data gives sufficient evidence to reject the geneticist's claim.
200

“____________________ must unlearn what you have learned”

Yoda, The Empire Strikes Back

300

Suppose the average score on a national test is 500 with a standard deviation of 100. If each score is increased by 25%, what are the new mean and standard deviation?

What is 625 and 125

300
A general statistical term meaning a systematic favoring of certain outcomes.
What is bias
300
A pharmaceutical company claims that a medicine will produce a desired effect for a mean time of 58.4 minutes. A government researcher runs a hypothesis test of 40 patients an calculates a mean of 59.5 minutes with a standard deviation of 8.3 minutes. What is p-value?
What is 2P(t>.838)
300
Suppose H0:p=.4 and the power of the test for the alternative hypothesis p=.35 is .75. What is the probability of failing to reject H0?
What is .25
300

"I am________________ of Motunui. You will board

my boat and restore the heart to Te Fiti.”

Moana, Moana

400

If quartiles Q1=20 and Q3=30, which of the following must be true? I. The median is 25 II. The mean is between 20 and 30 III.The standard deviation is at most 10

What is none of the above

400
The relative frequency of an event is the proportion of times the event happened, that is, the number of times the event happened divided by the total number of trials.
What is the law of large numbers
400
A school superintendent must make a decision whether or not to cancel school because of a threatening snow storm. What would the results be of Type I error?
What is weather remains dry, but school is needlessly cancelled.
400
Which is typically more severe, Type I or Type II error?
What is Type II error
400

“Yeah, yeah, but your scientists were so preoccupied with whether or not they could, that ____________________didn't stop to think if they should.”

Dr. Ian Malcolm, Jurassic Park

500

When a set of data has suspect outliers, what are the preferred measures of central tendency and variability?

What is median and IQR

500
The probability and event will occur given that another event has occurred.
What is conditional probability
500
What is the probability of mistakenly failing to reject a false null hypothesis when a hypothesis test is being conducted at the 5% significance level?
There is insufficient information
500
The probability that it correctly rejects the null hypothesis when the null hypothesis is false
What is power
500

“Three shall be the number _________________ shalt count, And the number of the counting shall be three.”

Brother Renard, Monty Python's Search for the Holy Grail