ISC Math 220, Fall 2014, Garren

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(A) At least twice on your output, use SPSS to print your name.

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(B) Change the random number seed to the last five digits of your student identification number.

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(C) Using SPSS:

(1) In column #1, generate 15 random variates from a Normal( μ = 60, σ = 20 ) population.

(2) Label the variable as "X1".

(3) Repeat parts (D1) and (D2) nine more times, except the nine additional sets of 15 numbers should be labeled as "X2" through "X10" and should be placed in columns 2 through 10. You will eventually need to print these data, which should be a 15 by 10 table.

(4) Use SPSS to determine an 80% confidence interval on the population mean ( μ ) for each of your 10 data sets.

(5) Next to your 10 confidence intervals, write either "contains μ" or "does not contain μ" according to whether or not your confidence interval contains the population mean (i.e., μ = 60). (Note: I am *NOT* asking you if your confidence intervals contain the sample mean, X. After all, the sample mean, X, is always in the middle of the confidence interval. I want to know if your confidence intervals contain μ = 60.)

(6) Based on your answers to part (C5), write the proportion of your 80% confidence intervals which contain the population mean, μ = 60.

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(D) Although you are allowed to receive help from others, list the names of those who helped you and the names of those whom you helped, as well as what type of help was given. If you did not give or receive help, then write "No help" on the first page. WARNING: Sharing ELECTRONIC copies of SPSS homework in part or in full is a university honor code violation.

(E) Staple your work together.

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