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BUSI 230 Week 2 exercises 2.2-3.3 Liberty University Complete Answers
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BUSI 230 Week 2 exercises 2.2-3.3 Liberty University Complete Answers

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Question 1

A personnel office is gathering data regarding working conditions. Employees are given a list of five conditions that they might want to see improved. They are asked to select the one item that is most critical to them. Which type of graph, circle graph or Pareto chart, would be the most useful for displaying the results of the survey? Why?

Question 2

Your friend is thinking about buying shares of stock in a company. You have been tracking the closing prices of the stock shares for the past 90 trading days. Which type of graph for the data, histogram or time-series, would be best to show your friend? Why?

Question 3

Commercial dredging operations in ancient rivers occasionally uncover archaeological artifacts of great importance. One such artifact is Bronze Age spearheads recovered from ancient rivers in Ireland. A recent study gave the following information regarding discoveries of ancient bronze spearheads in Irish rivers.

(a) Make a Pareto chart for these data.

(b) Make a circle graph for these data.

Question 4

How does average height for boys change as boys get older? According to Physician's Handbook, the average heights at different ages are in the table below.

Make a time-series graph for average height for ages 0.5 through 12 years.

Question 5

Wetlands offer a diversity of benefits. They provide a habitat for wildlife, spawning grounds for U.S. commercial fish, and renewable timber resources. In the last 200 years, the United States has lost more than half its wetlands. Environmental Almanac gives the percentage of wetlands lost in each state in the last 200 years. For the 30 of the lower 48 states, the percentage loss of wetlands per state is as follows.

Make a stem-and-leaf display of these data. (Use the tens digit as the stem and the ones digit as the leaf. Enter NONE in any unused answer blanks.)

Percent of Wetlands Lost

How are the percentages distributed? Is the distribution skewed? Are there any gaps? (Select all that apply.)

Question 6

The American Medical Association Center for Health Policy Research included data, by state, on the number of community hospitals and the average patient stay (in days) in its publication State Health Care Data: Utilization, Spending, and Characteristics. The data (by state) are shown in the table.

Using the number of hospitals per state listed in the table above, make a stem-and-leaf display for the number of community hospitals per state. (Enter NONE in any unused answer blanks.)

Number of Hospitals per State

Which states have an unusually high number of hospitals? (Select all that apply.)

Question 7

Consider the mode, median, and mean.

(a) Which average represents the middle value of a data distribution?

(b) Which average represents the most frequent value of a data distribution?

(c) Which average takes all the specific values into account?

Question 8

What symbol is used for the arithmetic mean when it is a sample statistic? What symbol is used when the arithmetic mean is a population parameter?

Question 9

Find the mean, median, and mode of the data set.

Question 10

Find the mean, median, and mode of the data set.

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BUSI 230 Week 2 exercises 2.2-3.3 Liberty University Complete Answers
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