# QNT 275 Week 1 Practice Set

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QNT 275 Week 1 Practice Set

Chapter 01, Section 1.3, Problem 008a

Correct.

Indicate if the following variable is quantitative or qualitative.

The amount of time a student spent studying for an exam is a

variable.

Chapter 01, Supplementary Exercises, Problem 043a

Correct.

State whether the following is an example of sampling with replacement or without replacement.

Selecting 60 patients out of 100 to test a new drug is sampling

replacement.

8th-ed Chapter 01, Section 1.2, Problem 006a

Correct.

Explain whether the following constitutes a population or a sample.

Opinions on a certain issue obtained from all adults living in a city constitute a

.

8th-ed Chapter 01, Section 1.3, Problem 009

The following table gives the number of dog bites reported to the police last year in six cities.

City Number of Bites

Center City   19

Elm Grove    38

Franklin 36

Bay City 33

Oakdale 38

Sand Point    53

With reference to this table, what is 38?

a measurement

a data set

a member

a variable

8th-ed Chapter 01, Section 1.3, Problem 011

Correct.

The following table gives the number of dog bites reported to the police last year in six cities.

City Number of Bites

Center City   46

Elm Grove    30

Franklin 51

Bay City 41

Oakdale 11

Sand Point    5

What is the variable for this data set?

The variable for this data set is the

.

How many observations are in this data set?

There is/are    observation(s) in this data set.

How many elements does this data set contain?

There is/are    element(s) in this data set.

8th-ed Chapter 01, Section 1.4, Problem 017

Correct.

Classify the following quantitative variable as discrete or continuous.

The amount of gasoline put into a car at a gas station is a

variable.

8th-ed Chapter 01, Section 1.6, Problem 021a

Correct.

Classify the following as cross-section or time-series data.

The average prices of houses in 500 cities is

data.

8th-ed Chapter 01, Section 1.7, Problem 023a

Correct.

The following table lists six pairs of m and f values.

m    5     4     23   11   11   19

f      15   10   16   7     3     13

Calculate the value of the following: ∑f=

exact number, no tolerance

8th-ed Chapter 01, Section 1.7, Problem 028a

Correct.

Nine randomly selected customers at a local fast-food restaurant ordered meals having the following calorie counts: 975, 520, 1560, 872, 1025, 431, 361, 502, and 1118. Let y denote the calorie content of a meal ordered at this restaurant. Find the following sum.

∑y=

exact number, no tolerance