NEW
Font size
WorksheetsAP Statistics Cumulative Review
Total questions: 10
Worksheet time: 26mins
According to the histogram above, which of the following statements is correct?
The distribution is skewed to the right
The distribution is skewed to the left
The distribution appears to be normal
The distribution appears to be uniform
In the 2012 London Olympics, Team USA set a new women' s world record of 40.82 seconds in the 4 × 100 meter relay. Suppose one runner covers 100 meters in an average of 10.9 seconds with a standard deviation of 0.12 seconds while a second runner covers 100 meters in an average of 11.0 seconds with a standard deviation of 0.05 seconds. Assuming that both distributions are normal and that their runs are independent, what is the probability that their combined time will be under 21.8 seconds?
.221
.278
.404
.722
.779
Which of the following is a true statement about sampling?
The size of the sample does not matter as long as the sample is random
The size of the population does not matter as long as the sample is random
A sample of more than 10% of the population is too large for statistical inference
None of these are correct
In the design of a survey, which of the following best explains how to minimize response bias?
increase the sample size
decrease the sample size
randomly select the sample
increase the number of questions in the survey
carefully word and field-test survey questions
A simple random sample consists of four observations: {1, 3, 5, 7}. Based on these sample observations, what is the best estimate of the standard deviation of the population?
2
2.58
6
6.67
none of the above
Suppose P(X)=.25 and P(Y)=.40. If P(XIY)=.20, what is P(YlX)?
.10
.125
.32
.45
A basketball player makes one out of his first two free throws. From that point on, the probability that he makes the next shot is equal to the proportion of shots he made up to that point. If he takes two more shots, what is the probability he ends up making a total of two free throws?
1/4
1/3
1/2
2/3
3/4
An office manager believes that the percentage of employees arriving late is even greater then the previously claimed 7%. She conducts a hypothesis test on a random 200 employee arrivals and finds 23 punching in late. Is this strong evidence against the .07 claim?
Yes, because the p-value is .0062
Yes, because the p-value is 2.5
No, because the p-value is only .0062
no, because the p-value is over .10
There is insufficient information to reach a conclusion
In a survey of 30 elementary school students, those with larger shoe sizes appear to have higher reading levels. Of the following, which is the most important conclusion about this observation?
Parents interested in their child's reading level should have their child wear a slightly larger shoe size.
The variables, shoe size and reading level, are being confounded.
The sample size is too small for any reasonable conclusion.
There is a lurking variable.
As long as the sample was randomly selected, a cause-and-effect conclusion is valid.
A telephone survey of 400 registered voters showed that 256 had not yet made up their minds 1 month before the election. At what confidence level can we say that between 60 percent and 68 percent of the electorate were still undecided at that time?
2.4%
64%
90.4%
95.3%
96.7%
