AP Statistics - Final Exam Study Guide (V.2)
Detailed Questions And Expert Answers
1. The histogram summarizes the responses of 100 people when asked,"What was
the price of the last meal you purchased?"
Based on the histogram, which of the following could be the interquartile range of
the prices?
A) $40
B) $21
C) $10
D) $5
E) $3 - ANS D) $5
2. Suppose a certain scale is not calibrated correctly, and as a result, the mass of
any object is displayed as 0.75 kilogram less that its actual mass. What is the
correlation between the actual masses of a set of objects and the respective
masses of the same set of objects displaced by the scale?
A) -1
B) -0.75
C) 0
,D) 0.75
E) 1 - ANS E) 1
3. A veterinarian collected data on the weights of 1,000 cats and dogs treated at a
veterinary clinic. The weight of each animal was classified as either healthy,
underweight, or overweight. The data are summarized in the table.
Based on the data in the table, which of the following is the appropriate type of
graph to visually show whether a relationship exists between the type of animal
and the weight classification.
A) Back-to-back stemplots
B) Scatterplot
C) Side-by-side boxplots
D) Segmented bar chart
E) Dotplot - ANS D) Segmented bar chart
4. A program exists to encourage more middle school students to major in math
and science when they go to college. The organizers of the program want to
estimate the proportion of students who, after completing the program, go on to
major in math or science in college. The organizers will select a sample of students
from a list of all students who completed the program. Which of the following
sampling method describes a stratified random sample?
A) Select all female students on the list.
, B) Randomly select 50 students on the list.
C) Randomize the names on the list and then select every tenth student on the
randomized list.
D) Randomly select 25 names from the female students on the list and 25 names
from the male students on the list.
E) Randomly select 50 students on the list who are attending college. - ANS
5. The normal curve shown represents the sampling distribution of a sample mean
for a sample size n=25, selected at random from a population with a standard
deviation Ox.
Which of the following is the best estimate of the standard deviation of the
population, Ox?
A) 3
B) 6
C) 15
D) 30
E) 75 - ANS E) 75
6. Two random samples, A and B, were selected from the same population to
estimate the population mean. For each sample, the mean, standard deviation,
and margin of error for a 95 percent confidence interval for the population mean
are show in the table.
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