Question 1

Which of the following correctly describes the relationship between a parameter and a statistic?

Accepted Answer

A statistic is calculated from sample data and is generally used to estimate a parameter.

Question 2

In a study to determine the average commute time per week to and from class for an SPC student attending a lecture class, a sample of 60 students was taken from two campuses. What is the population for this study?

Accepted Answer

All SPC students who attend lecture classes.

Question 3

Which branch of statistics deals with the organization and summarization of collected information?

Accepted Answer

Descriptive

Question 4

From past figures, it is predicted that 19% of the registered voters in California will vote in the June primary. Does this statement describe inferential or descriptive statistics?

Accepted Answer

Inferential

Question 5

Classify the variable: The cost of a Statistics textbook.

Accepted Answer

Quantitative

Question 6

Classify the variable: Eye Color.

Accepted Answer

Qualitative

Question 7

A study where a drug was given to 23 patients and a placebo to another group of 23 patients to determine if the drug has an effect on a patient's illness. What is the method of data collection?

Accepted Answer

Experiment

Question 8

A political pollster wishes to determine if his candidate is leading in the polls for an upcoming election. What is the most appropriate method of data collection?

Accepted Answer

Observational study

Question 9

50 sophomores, 30 juniors and 20 seniors are randomly selected from 500 sophomores, 300 juniors and 200 seniors at a certain high school. What sampling method is used?

Accepted Answer

Stratified

Question 10

Every fifth person boarding a plane is searched thoroughly. What sampling method is used?

Accepted Answer

Systematic

Question 11

At a local community college, five statistics classes are randomly selected out of 20 and all of the students from each class are interviewed. What sampling method is used?

Accepted Answer

Cluster

Question 12

A community college student interviews everyone in a statistics class to determine the percentage of students that own a car. What sampling method is used?

Accepted Answer

Convenience

Question 13

Refer to the histogram of heart rates in a yoga class. If there were 15 participants, what percent had a heart rate between 130 and 150 bpm?

Accepted Answer

33%

Question 14

Given the heights (in inches) of ten randomly chosen American males: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72. What is the mean height?

Accepted Answer

$$72$$

Question 15

Given the heights (in inches) of ten randomly chosen American males: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72. What is the median height?

Accepted Answer

$$72$$

Question 16

Given the heights (in inches) of ten randomly chosen American males: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72. What is the mode?

Accepted Answer

$$72$$

Question 17

The median LSAT score reported by a Law School is 170. Which of the following is NOT correct?

Accepted Answer

Half of the students have an LSAT score of 170.

Question 18

Refer to the histogram of ages of osteoporosis patients. What is the overall shape of the distribution, and which measure of center is better?

Accepted Answer

Skew right, the median would provide a better measure of center.

Question 19

Here are costs (in dollars) of 12 electric smooth top ranges: 860, 1000, 650, 560, 1460, 1100, 700, 760, 870, 1300, 550, 1060. What is the range of the data set?

Accepted Answer

$$930$$

Question 20

Given the heights (in inches) of ten randomly chosen American males: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72. What is the sample standard deviation?

Accepted Answer

$$2.87$$

Question 21

Which of the three histograms shown summarizes the data set with the smallest standard deviation?

Accepted Answer

2

Question 22

Lengths of pregnancies of humans are normally distributed with a mean of 265 days and a standard deviation of 10 days. Use the Empirical Rule to determine the percentage of women whose pregnancies are between 255 and 275 days.

Accepted Answer

95%

Question 23

Given the heights (in inches) of ten randomly chosen American males: 71, 67, 67, 72, 76, 72, 73, 68, 72, 72. What is the Five Number Summary?

Accepted Answer

67, 68, 72, 72, 76

Question 24

Refer to the boxplot of BMW purchases. For which series was the median age of purchase equal to 41?

Accepted Answer

The 3 series

Question 25

A high school student took two college entrance exams and scored 1120 on the SAT and 27 on the ACT. SAT scores have a mean of 950 and a standard deviation of 140. ACT scores have a mean of 22 and a standard deviation of 4. Which test did the student do better on, based on z-scores?

Accepted Answer

ACT

Module 1 Test – Step-by-Step Statistics Guidance

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드