business statistics

Lab Assignment-1-Sample

1. College student attitudes about e-books were investigate in a survey of 1625 students. Stu-

dents were asked to indicate their level of agreement with the following statement.

The result are summarized in the accompanying table.

Response Percent in this category

Strongly disagree 21.3 Disagree 29.2 Agree 25.0

Strongly agree 13.2 Don’t know 11.3

(a) Construct an Bar graph and Pie chart .

2. Here are costs of 10 electric smoothtop ranges rated very good or excellent by Consumer

Reports in August 2002

850 900 1400 1200 1050 1000 750 1250 1050 565

(a) Construct a histogram.

(b) Construct a boxplot.

(c) Find the summary statistics

(d) Find the standard deviation

3. The U.S. Department of Transportation collect data on the amount of gasoline sold in each

state. The data are given in the per capita (gallons used per person) consumption in the year

2000. Using appropriate graphical displays and summary statistics, write a report on gasoline

use by state in the year 2000.(Use data set Gasoline data in Excel on Data folder on Blackboard)

4. Duncan’s Occupational Prestige Data. Duncan collected data on 45 U.S. occupations

in 1950, including the percentage of high-school graduates in each occupation (‘education‘),

the percentage of individuals earning $3500 or more (‘income‘), and the percentage of raters in a national survey who rated the occupation as good or better in prestige (‘prestige‘). The

income and education data were from the U.S. Census. (Duncan.txt data)

(a) What are the mean and median for education and income?

(b) What are the variance and standard deviation of education and income?

(c) Create a boxplot for Income and Education

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5. Vineyard. Here are summary statistics for the sizes(in acres) of Finger Lakes Vinyards

Count 48 Mean 68.35

Standard deviation 10.20 Median 69.90 Minimum 43.20

First Quartile(Q1) 59.15 Third Quartile (Q3) 74.75

Maximum 87.40

(a) Would you describe this distribution as symmetric or skewed? Explain.

(b) Are there any outliers? Explain.

(c) Write a few sentences about the graduation rate.

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