In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a:

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1DA. Population/parameter/sample/statistic/inferential/descriptive

Score for this attempt: 30 out of 30

Submitted Feb 28 at 5:47pm

This attempt took 33 minutes.

Question 1

2 / 2 pts

In a survey of 1000 adults, 34% found they prefer charcoal to gas grills. The 34% would be considered a:

*Homework Help:*

1DA. Population/parameter/sample/statistic/inferential/descriptive

Links to an external site. (DOCX)

Population

Parameter

Sample

Statistic

Question 2

2 / 2 pts

The average age of students in a statistics class is 28 years. The 28 years would be considered an example of:

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1DA. Population/parameter/sample/statistic/inferential/descriptive

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Inferential statistics

Descriptive statistics

Qualitative data

A population

Question 3

2 / 2 pts

The ages of 20 first graders would be considered:

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1DB. Qualitative/quantitative/nominal/ordinal/interval/ratio

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Interval data

Quantitative data

Qualitative data

Nominal data

Question 4

2 / 2 pts

The ratings of 50 movies would be considered:

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1DB. Qualitative/quantitative/nominal/ordinal/interval/ratio

Links to an external site. (DOCX)

Quantitative data

Interval data

Ratio data

Ordinal data

Question 5

2 / 2 pts

A researcher randomly selects and interviews fifty male and fifty female teachers. This sampling technique is called:

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Random

Cluster

Stratified

Convenience

Question 6

2 / 2 pts

Cameras are set up to watch an intersection and determine how many cars are let through with each green light interval. This study design would be considered:

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Survey

Experimental

Observational

Simulation

Question 7

2 / 2 pts

Which of the following would be the mean of this data set: 5, 7, 12, 36, 14, 12, 33, 21

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1VA. Calculating mean/standard deviation/variance (population and sample)

1DE. Mean/median/mode/right skewed/left skewed/normal

1DF. Range/variance/standard deviation (population and sample) and shape of distribution,

13.00

17.5

11.6

11.4

Question 8

2 / 2 pts

Which of the following would be the variance of this population data set: 3, 6, 8, 9, 4, 5, 7, 1, 9, 7, 15, 4, 3, 1

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1VA. Calculating mean/standard deviation/variance (population and sample)

13.00

14.00

25.73

3.74

Question 9

2 / 2 pts

What is the relationship between variance and standard deviation?

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1VA. Calculating mean/standard deviation/variance (population and sample)

1DF. Range/variance/standard deviation (population and sample) and shape of distribution, examples

Standard deviation is four times the variance

Variance is the square root of the standard deviation

Standard deviation is the square root of the variance

Variance is four times the standard deviation

Question 10

2 / 2 pts

A meteorologist wants to create a graph that displays the high temperature for each day for the past 30 days. Which of the following graphs might be most effective to use?

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Scatter plot

Line chart

Pie chart

Pareto chart

Question 11

2 / 2 pts

Given the following data: 12.1, 56.8, 14.4, 45.2, 14.4, 23.7, 14.4, 21.3, 17.6. Determine the mean

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12.1

24.4

14.4

Question 12

2 / 2 pts

In manufacturing, cluster sampling could be used to determine if the machines are operating correctly. Which of the following best describes this type of sampling?

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Every 10th product in the line is selected

Products are put into groups, some groups are selected and all products from each selected group are included in the sample

Samples are randomly selected throughout the day

Products are put into groups and some are randomly selected from each group

Question 13

2 / 2 pts

A graph shows vertical bars with the number of data points on the y-axis and groups on the x-axis. This graphic is most likely to be:

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1VD. Graphs: histogram, circle graphs, scatter plots in Excel

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A stem-leaf plot

A frequency histogram

A frequency polygon

A dot plot

Question 14

2 / 2 pts

Match the terms and their definitions

*Homework Help:*

1VD. Graphs: histogram, circle graphs, scatter plots in Excel

1DA. Population/parameter/sample/statistic/inferential/descriptive

1DB. Qualitative/quantitative/nominal/ordinal/interval/ratio

1DC. Random/cluster/stratified/convenience/systematic

Vertical bar chart that shows frequency on the y-ax

Population is divided into groups, some groups are selected and all observations from each selected group are included in the sample

Collection of all data that is of interest

A subset or part of a population

A sample where the population is divided into groups and several are randomly sampled form each group

Consists of attributes, labels, or nonnumerical entries

Question 15

2 / 2 pts

Match the terms and their definitions

*Homework Help:*

Links to an external site. (DOCX)

1DF. Range/variance/standard deviation (population and sample) and shape of distribution, examples

Links to an external site. (DOCX)

The most frequent number appearing in a dataset

The average

The difference between the largest and smallest data points

The square root of the variance

The middle value in a dataset

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