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The temperature of 26 selected refrigerators would be considered:

07/11/2020 Client: papadok01 Deadline: 24 Hours

Question 1

A recent survey of the alumni of a university indicated that the average salary of 10,000 of its 200,000 graduates was $130,000. The $130,000 would be considered a:

Statistic

Sample

Parameter

Population


Question 2

A survey of 1050 students was taken from a university with 19,500 students. The 19,500 would be considered a:

Parameter

Population

Sample

Statistic


Question 3

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

A population

Qualitative data

Descriptive statistics

Inferential statistics

Question 4

The temperature of 26 selected refrigerators would be considered:

Interval data

Nominal data

Ordinal data

Ratio data

Question 5:

Marriage status (married, single etc.) of the faculty of a university would be considered:

Qualitative data

Quantitative data

Ratio data

Ordinal data

Question 6:

The nationalities (for example, Asian, European, etc.) listed in a recent survey would be considered:

Ordinal data

Interval data

Nominal data

Ratio data

Question 7:

Every fifth person boarding a plane is asked additional security questions. The sampling technique is called:

Random

Stratified

Cluster

Systematic

Question 8:

The personnel director at a large company would like to determine whether the company cafeteria is widely used by employees. She calls each employee and asks them whether they usually bring their own lunch, eat at the company cafeteria, or go out for lunch. This study design would be considered:
Simulation

Observational
Experimental

Survey

Question 9

Which of the following would be the mean of this data set: 5, 28, 12, 56, 4, 2, 30, 21

18.24

19.75

16.50

17.06

Question 10:

Which of the following would be the standard deviation of this sample data set: 67, 54, 17, 77, 92, 41, 75, 81

22.9

525.2

24.5

600.3

Question 11:

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

7.05

6.55

2.56

2.66

Question 12:

What is the relationship between variance and standard deviation?

Standard deviation is the square root of the variance

Variance is the square root of the standard deviation

Variance is four times the standard deviation

Standard deviation is four times the variance

Question 13:

If data set A has a larger standard deviation than data set B, what would be different about their distributions?

Data set A would have a larger mean

Data set A would have a flatter distribution with more data in each tail

Data set A would have more data near the center of the distribution

Data set A would have most of its data to one side of the distribution

Question 14:

In a normally distributed data set a mean of 55 where 95% of the data fall between 47.4 and 62.6, what would be the standard deviation of that data set?

3.8

1.9

5.7

7.6

Question 15:

Which of the following data sets would you expect to have the highest standard deviation?

The number of phones a person owns

Amount of soda in an unopened can (in ounces)

Ages of people taking college classes (in years)

Weight of an orange (in ounces)

Question 16:

Which data outcome of the speed of cars would best support installing a speed bump?

High mean with high standard deviation

Low mean with high standard deviation

High mean with small standard deviation

Low mean with small standard deviation

Question 17

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

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

Every 10th product in the line is selected

Products are put into groups and all are included from several randomly selected groups

Samples are randomly selected throughout the day

Question 18:

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:

A frequency histogram

A dot plot

A frequency polygon

A stem-leaf plot

Question 19

Match the terms and their definitions:

Vertical bar chart that shows frequency on the y-axis

A sample where the population is divided into groups and several groups are randomly selected and all from selected groups are sampled

Collection of all counts that are of interest

A subset or part of a population

A sample where the population is divided into groups and several are randomly selected from each group

Consists of attributes, labels or non-numerical entries

Question 20:

Match the terms and their definitions

The most frequent number appearing in a data set

The average

The percentage of data that falls within 1, 2 or 3 standard deviations of the mean in a symmetrical bell-shaped distribution

The square root of the variance

Show how far a particular data point is from the mean in terms of the standard deviation

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