Download SPSS_Exercise

Exercise 1
1. Download the dataset TrashBag from Dataset of Website.
a. Use SPSS to generate a stem-and-leaf display of the sample of 40 breaking strengths in the
trash bag case. And describe the distribution of breaking strengths.
b. Do there appear to be any breaking strengths that are outliers?
c. Use SPSS to get a histogram of the sample of 40 breaking strengths.
d. What are the advantages of using a stem-and leaf display?
e. If a data set consists of 1,000 measurements, would you summarize the data set by using a
stem-and-leaf display or a histogram? Explain.
2. Use SPSS to calculate the mean, median and mode, range, variance, standard deviation of the
following sample of numbers, and paste the SPSS output to your answer sheet.
110, 120, 70, 90, 90, 100, 80, 130, 140
3. THE BANK CUSTOMER WAITING TIME CASE (Download the dataset WaitTime from
Dataset of Website)
WaitTime file presents the waiting times for teller service during peak business hours of 100
randomly selected bank customers.
a. Does the sample mean provide evidence that the mean of the population of all possible
customer waiting times during peak business hours is less than six minutes (as is desired by
the bank manager)? Explain your answer. (Use SPSS to get the sample mean)
b. Use SPSS to construct the stem-and-leaf display.
4. Consider the 63 automatic teller machine (ATM) transaction times. (Download the dataset
ATMTime from Dataset of Website
Use SPSS to construct a histogram (or a stem-and-leaf display) for the 63 ATM transaction times.
Describe the shape of the distribution of transaction time.
5. Download the dataset Drsalary from Dataset of Website. Use SPSS to obtain 90th percentile,
median, the first quartile, the third quartile and the box plot. And describe the distribution of the
data with respect to central tendency, skewness and outliers.
6. On March 11, 2005, the Gallup Organization released the results of a CNN/USA Today/Gallup
national poll regarding Internet usage in the United States. Each of 1,008 randomly selected adults
was asked to respond to the following question:
“As you may know, there are Web sites known as ‘blogs’ or ‘Web logs’, where people
sometimes post their thoughts. How familiar are you with ‘blogs’-very familiar, somewhat
familiar, not too familiar, or not at all familiar?”
The poll’s results were as follows: Very familiar (7%); Somewhat familiar (19%); Not too familiar
(18%); Not at all familiar (56%). Use SPSS to construct a bar chart and a pie chart. (Download the
dataset Poll from Dataset of Website)