Compute spss and confidence interval , Basic Statistics

A researcher is interested in characteristics of HIV+ and HIV- adolescents interviewed 166 young adults about their experiences during adolescence. He wished to know, among other things, if there were significant differences in the ages at which HIV+ and HIV- young adults became sexually active. The following is the printout of this analysis:

HIV Status                     N      Mean     sd           Stnd. Error
Age at         Positive      57     13.2     2.96576     .39282
first sexual
experience Negative     109     15.1     2.57286     .24644

Independent Samples Test
Levene's Test for
Equality of Variances
F Sig
Age at Equal variance assumed 1.313 .254
first sexual
experience Equal variance not assumed

t-test for Equality of Means
                                                                        t            df      sig.       mean difference
Age at                 Equal variance assumed           -2.870   164     .005        -1.9
first sexual
experience           Equal variance not assumed     -2.745   99.66  .007        -1.9

1. Were there significant differences between the groups. Give the relevant stastical data to support your answer?

2. What is the confidence interval associated with your answer to item 1?

Each of the questions on the following pages is a calculation problem worth 10 points. Partial credit will be awarded if I can following your procedures and determine that errors are arithmetic rather than conceptual. It would be wise, therefore, to clearly indicate your worksteps on each problem.

3. For the following data set, calculate the oneway ANOVA and test for significance at the .05 level.

Group 1                       Group 2                       Group 3                       Group 4

x          x2                     x          x2                     x          x2                     x          x2

7          49                    10        100                  12        144                  16        256

8          64                    12        144                  14        196                  15        225

7          49                    13        169                  13        169                  18        324

9          81                    13        169                  11        121                  17        289

9          81                    14        196                  13        169                  20        400

11        121                  15        225                  15        225                  21        441

10        100                  14        196                  13        169                  22        484

61        545                  91     1,199                  91     1,193                 129     2,419

Posted Date: 2/18/2013 12:59:46 AM | Location : United States







Related Discussions:- Compute spss and confidence interval , Assignment Help, Ask Question on Compute spss and confidence interval , Get Answer, Expert's Help, Compute spss and confidence interval Discussions

Write discussion on Compute spss and confidence interval
Your posts are moderated
Related Questions
discuss the considerations to be borne in mind when constructing index numbers

six subjects were exposed to 4 treatments and the following data were recorded

Annuity A sequence of equivalent money payments made or obtained at equivalent durations over a specific time period.

which one is better skewed or kurtic distributed data?

Are depreciation, depletion and amortization similar? In accounting the terms depreciation, depletion and amortization often involve the movement of costs from the balance s


Q. How to stretch or shrink a graph? Ans. If you have the equation of a graph, you can stretch or shrink the graph, in either the x or the y direction, just by multiplying

Mike sells on the average 15 newspapers per week (Monday – Friday). Find the probability that 2.1 In a given week he will sell all the newspapers


Question 1: (a) Describe the factors that contributed to the adoption of structural adjustment programme by a majority of Least Developed Countries in the 1980s? (b) Describ