SBSS homework

STAT 244

Winter 2017

SPSS Lab 2

Due: Wed. 3/1.

This lab should be done using SPSS available in most PSU computer labs. A hard copy of your final work (your Word

document) is to be handed by the above mentioned due date. You may work in groups, but each individual should hand in

his/her own copy. Summaries should be written in your own words.

Preliminary: Open Microsoft Word (or an equivalent text editor) so that you can copy and paste your SPSS results.

Type your name at the top left hand corner. Arrange the following SPSS output in order and type in the questions

below each copied output.

Type your name in the upper left hand corner of a Word document. Below your name type in Stat244NB Lab 2.

Copy the following problems from SPSS in the same order as they appear on the lab.

1. (12 points)

A random sample of enrollments from medical schools that specialize in research and primary care are listed below.

Use SPSS to answer the following questions. Directions and screen shots follow the questions.

a) Determine the 90% confidence interval for the difference in the mean enrollment. Type a sentence that interprets this confidence interval using context and units from the problem.

b) Test the claim that there is a difference in enrollment between research and primary care medical schools using the p- value method with α = 0.10.

i. Type the hypotheses. ii. Type in the test statistic found from the SPSS output.

iii. Type in the p-value found from the SPSS output. iv. Type your decision. v. Type your summary.

Open a new data file in SPSS. Under the Variable View tab, name the columns Enrollment and Specialty, then under

Values assign zero to the label Research and one to the label Primary Care.

Now switch to the Data View tab. Type in all the numeric data in one

column under Enrollment. In the second column under Specialty, type a 0 if the enrollment was from Reasearch

and a 1 if it was Primary Care. See screen shot below.

Select Analyze > Compare Means > Independent-Samples T Test.

Bring Enrollment over to the Test Variable(s) box. Bring Specialty over to the Grouping Variable. Select Define Groups

and enter 0 and 1 for Groups 1 and 2, then select Continue.

Then click on options and change the confidence

interval percentage, click Continue, then OK.

Copy the output to the Word document. Use the SPSS output to answer the questions below your output.

2. (8 points)

A reporter hypothesizes that the average assessed values of land in a large city have changed during a 5-year period. A

random sample of wards is selected and the data (in millions of dollars) are shown. At α = 0.05, can it be concluded

that the average assessed values have changed? Use the SPSS output and the p-value method.

Select the Variable View Tab and set up your variables. Label the columns 1994 and 1999, note that SPSS does not like

spaces or just numbers in the “Name” so I put in Year1994, see below.

Then type in your data into the two separate columns. Select Analyze > Compare Means > Paired-Samples T Test.

Select 1994 as the Variable 1 group, then 1999 as the Variable 2 group. Then click on options and change the confidence

interval percentage. Then select Continue, the OK.

Copy the output to the Word document. Use the p-value method type in the hypotheses,

p-value, and your decision and summary right below the output.