# Collaborative Statistics Sample Exercise

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Questions: 9 | Attempts: 184

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P. P1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica} 1.12.1 Try these multiple choice questions

• 1.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} The next four questions refer to the following: A Lake Tahoe Community College instructor is interested in the average number of days Lake Tahoe Community College math students are absent from class during a quarter. Exercise 1.12.19 What is the population she is interested in?

• A.

A. All Lake Tahoe Community College students

• B.

B. All Lake Tahoe Community College English students

• C.

C. All Lake Tahoe Community College students in her classes

• D.

D. All Lake Tahoe Community College math students

D. D. All Lake Tahoe Community College math students
Explanation
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• 2.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica} Exercise 1.12.20 Consider the following: X = number of days a Lake Tahoe Community College math student is absent In this case, X is an example of a:

• A.

A. Variable

• B.

B. Population

• C.

C. Statistic

• D.

D. Data

A. A. Variable
Explanation
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• 3.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica} Exercise 1.12.21 The instructor takes her sample by gathering data on 5 randomly selected students from each Lake Tahoe Community College math class. The type of sampling she used is

• A.

A. Cluster sampling

• B.

B. Stratified sampling

• C.

C. Simple random sampling

• D.

D. Convenience sampling

B. B. Stratified sampling
Explanation
The instructor used stratified sampling because she divided the population (Lake Tahoe Community College math classes) into different groups (strata) based on some characteristic (students) and then randomly selected 5 students from each group. This ensures that each group is represented in the sample, allowing for more accurate results.

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• 4.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica} Exercise 1.12.22 The instructor’s sample produces an average number of days absent of 3.5 days. This value is an example of a

• A.

A. Parameter

• B.

B. Data

• C.

C. Statistic

• D.

D. Variable

C. C. Statistic
Explanation
The instructor's sample produces an average number of days absent of 3.5 days, which is a specific value calculated from the data collected in the sample. This value represents a characteristic of the sample itself and is therefore an example of a statistic.

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• 5.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} span.s1 {font: 7.6px Helvetica} The next two questions refer to the following relative frequency table on hurricanes that have made direct hits on the U.S between 1851 and 2004. Hurricanes are given a strength category rating based on the minimum wind speed generated by the storm. (http://www.nhc.noaa.gov/gifs/table5.gif13) p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} p.p2 {margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Helvetica} Exercise 1.12.23 What is the relative frequency of direct hits that were category 4 hurricanes?

• A.

A. 0.0768

• B.

B. 0.0659

• C.

C. 0.2601

• D.

D. Not enough information to calculate

B. B. 0.0659
Explanation
The relative frequency of direct hits that were category 4 hurricanes is 0.0659. This means that out of all the direct hits on the U.S between 1851 and 2004, approximately 6.59% of them were category 4 hurricanes.

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• 6.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} Exercise 1.12.24 What is the relative frequency of direct hits that were AT MOST a category 3 storm?

• A.

A. 0.3480

• B.

B. 0.9231

• C.

C. 0.2601

• D.

D. 0.3370

B. B. 0.9231
Explanation
The relative frequency of direct hits that were AT MOST a category 3 storm is 0.9231. This means that out of all the direct hits, 92.31% of them were category 3 storms or lower.

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• 7.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} The next three questions refer to the following: A study was done to determine the age, number of times per week and the duration (amount of time) of resident use of a local park in San Jose. The first house in the neighborhood around the park was selected randomly and then every 8th house in the neighborhood around the park was interviewed. Exercise 1.12.25 “‘Number of times per week”’ is what type of data?

• A.

A. qualitative

• B.

B. quantitative - discrete

• C.

C. quantitative - continuous

B. B. quantitative - discrete
Explanation
The data "number of times per week" is considered quantitative because it represents a numerical value. It is specifically classified as discrete because it represents a countable number of times, rather than a continuous range of values.

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• 8.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} Exercise 1.12.26 The sampling method was:

• A.

A. simple random

• B.

B. systematic

• C.

C. stratified

• D.

D. cluster

B. B. systematic
Explanation
The correct answer is B. systematic. Systematic sampling is a sampling method where every nth item in the population is selected to be included in the sample. In this case, the sampling method used is systematic, meaning that every nth item was selected for the sample.

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• 9.

### p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} Exercise 1.12.27 “‘Duration (amount of time)”’ is what type of data?

• A.

A. qualitative

• B.

B. quantitative - discrete

• C.

C. quantitative - continuous

C. C. quantitative - continuous
Explanation
Duration (amount of time) is considered as quantitative - continuous data because it represents a measurable quantity that can take on any value within a given range. In this case, the duration can be measured in hours, minutes, or seconds, and it can take on any value within those units. It is not limited to specific discrete values and can be measured with precision.

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Jun 17, 2011
Quiz Created by
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