Statistics

Problem 1: Download the fluoride.sav data set and use it to answer the research question: "Is there is a change in the mean number of cavity-free children per 100 before and after the public water fluoridation project?" Use SPSS to complete the following calculations:

1. Run a one-sample t test on DELTA.
2. Run a paired-sample t test for the before and after mean numbers of cavity-free children to answer this research question.
3. Calculate a 95% confidence interval for the mean change.

Data Set: Fluoride.sav

Problem 2: Download the data set histidine.sav and use it to answer the research question: "Is there a mean difference in the 24-hour histidine excretion among men and women?" Use SPSS to complete the following calculations:

1. Run a two-sample independent t test.
2. Calculate a 95% CI for the mean difference in the 24-hour histidine excretion levels among men and women.

Week 7 Data Set: Histidine.sav

For problem 2, question #1, comment on which version of the t test we should use (equal variance or unequal variance) and why?

Price: $8.42

Solution: The downloadable solution consists of 4 pages, 442 words and 6 charts.
Deliverable: Word Document