Show:
Shapes of Distributions and Box Plots
Sampling and Probability
Binomial and Normal Distributions and Hypothesis Testing
Setting up a test,
Errors and Hypothesis Testing
100
Which of the following distributions are more likely to be skewed to the right? I. Household prices 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.
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.
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?

What is 625.

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 you want to set up a hypothesis test for the difference of proportions.  What is the null hypothesis?

p1-p2=0 or p1=p2

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
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

A hypothesis test is being performed with an alpha level of .05.  The p-value is .07, what would you conclude? (write a complete sentence)

The test fails to reject the null hypothesis.

500

Which error if any rejects the null hypothesis when the null hypothesis is false

No error occured