Question 1

Which of the following best describes the shape of the distribution in the 'Yelp Ratings for Hot Doug’s' bar graph?

Accepted Answer

Skewed left

Question 2

In the 'Sum of Two Dice' histogram, what is the most frequent outcome observed?

Accepted Answer

7

Question 3

Refer to the stem plot of Best Actress Age. What is the age of the youngest winner?

Accepted Answer

22

Question 4

The histogram of speeding tickets issued shows a distribution that is:

Accepted Answer

Skewed right

Question 5

Based on the histogram of speeding tickets, would you expect the mean to be greater than, equal to, or less than the median?

Accepted Answer

Mean is greater than median

Question 6

Compare the two histograms of exam scores. Which exam has a higher center?

Accepted Answer

Exam 1

Question 7

In the stemplot of church choir ages, what is the median age?

Accepted Answer

26

Question 8

Using the boxplot of pizza delivery times, which pizza place has more variability in delivery times?

Accepted Answer

Big Slice

Question 9

Refer to the boxplot of university student weights. Which statement is true?

Accepted Answer

100% of male students weigh less than 100 kg.

Question 10

Based on the boxplot for TV & Homework Minutes per Night, which activity is more common for students to spend an hour or more on?

Accepted Answer

TV

Question 11

In the boxplot comparing average monthly high temperatures, which city has a greater median temperature?

Accepted Answer

Honolulu

Question 12

Which city has more variation in average temperature according to the boxplot?

Accepted Answer

Milwaukee

Question 13

Which scatterplot has a correlation coefficient of $$r = -0.912$$?

Accepted Answer

Bottom right

Question 14

Which of the two bar graphs showing house prices is misleading, and why?

Accepted Answer

The first graph is misleading because it uses a truncated y-axis.

Question 15

Which hurricane graph is misleading, and what makes it misleading?

Accepted Answer

The second graph is misleading because it only shows the part of the graph where hurricanes are increasing.

Question 16

If a normal distribution has a mean of 35 and a standard deviation of 10, what is the median?

Accepted Answer

$$35$$

Question 17

If the mean high temperature in Honolulu is $$83^	ext{o}$$ with a standard deviation of $$6^	ext{o}$$, what is the range of temperatures that 95% of the days fall?

Accepted Answer

$$83 \pm 2 	imes 6$$

Question 18

A z-score of $$0.75$$ means:

Accepted Answer

$$x is$$ $$0.75$$ standard deviations above the mean.

Question 19

If $$P(D) = 0.02$$ for a computer part being defective, what does this mean?

Accepted Answer

The part is unlikely to be defective.

Question 20

In a box with 8 red, 7 blue, and 6 green balls, what is the probability of picking a blue ball?

Accepted Answer

$$\frac{7}{21}$$

Step-by-Step Guidance for Statistics Midterm Practice Problems

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드