Compute spss and confidence interval , Basic Statistics

Assignment Help:

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


Related Discussions:- Compute spss and confidence interval

How to choose a sample, Q. How to Choose a Sample? The way a sample is ...

Q. How to Choose a Sample? The way a sample is chosen is extremely important in all statistical studies. This is because, ultimately, all the inferences will be based on the s

Simple arithamatic mean, following the hight of studen 155,153,168,160,162...

following the hight of studen 155,153,168,160,162,166,167,180,257,165,

Statistical inference is that branch of statistics, Statistical inference i...

Statistical inference is that branch of statistics Statistical inference is that branch of statistics which is concerned with using probability concept to deal with uncertainty

Closing Stock , How to calculate closing stock in Tally while we are postin...

How to calculate closing stock in Tally while we are posting with inventory.

Data analysis, S&V Industries manufactures book cases. Different sizes of c...

S&V Industries manufactures book cases. Different sizes of cases are kept in inventory. The company has 80 man-hours and 36 pounds of wood available each day. 2 pounds of wood are

Determine the level of consumption, Suppose an individual has a lifetime ea...

Suppose an individual has a lifetime earnings profile and expects to live for 4 Periods:             Earnings in Period 1:   $30             Earnings in Period 2:   $60

Intervals, At a tennis tournament a statistician keeps track of every serve...

At a tennis tournament a statistician keeps track of every serve. The statistician reported that the mean serve speed of a particular player was 102 miles per hour (mph) and the st

Allowance for uncollectible , Allowance for uncollectible A contra-asset a...

Allowance for uncollectible A contra-asset assessment consideration used to indicate the part of a / r that is approximated to be uncollectible.

Identification of null and alternative hypotheses, A politician claims that...

A politician claims that the mean salary for managers in his state is more than national mean $82,000.  The salaries (in dollars) for a random sample of 30 managers in the state ar

Index, where i found an assignment about index?

where i found an assignment about index?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd