Are nursing salaries in Tampa, Florida, lower than those inDallas, Texas? As reported by the Tampa Tribune, salarydata show staff nurses in Tampa earn less than staff nurses inDallas. Suppose that in a follow-up study of 41 staff nurses inTampa and 51 staff nurses in Dallas you obtain the followingresults. Enter negative value as negative number.
| Tampa | | Dallas |
|---|
| n1=41 | | n2=51 |
| ^-x1=58,800 | | ^-x2=62,800 |
| s1=4,800 | | s2=6,200 |
a. Formulate hypothesis so that, if the nullhypothesis is rejected, we can conclude that salaries for staffnurses in Tampa are significantly lower than for those in Dallas.Use a=.05
| - Select your answer -<>??=?Item 1 | |
| - Select your answer -<>??=?Item 2 | |
b. What is the value of the test statistic?
(to 3 decimals)
c. What is the p-value?
Degrees of freedom is ? Round degrees of freedom to previouswhole number.
Consider the following results for independent samples takenfrom two populations.
| Sample 1 | Sample 2 |
| n1 = 400 | n2= 300 |
| p1= 0.49 | p2= 0.39 |
a. What is the point estimate of the differencebetween the two population proportions (to 2 decimals)?
b. Develop a 90% confidence interval for thedifference between the two population proportions (to 4 decimals).Use z-table.
? to ?
c. Develop a 95% confidence interval for thedifference between the two population proportions (to 4 decimals).Use z-table.
? to ?
Consider the following hypothesis test.
H0: u1 - u2 ? 0
Ha: u1 -u 2 > 0
Consider the following results for two independent randomsamples taken from two populations.
| Sample 1 | Sample 2 |
| n 1 = 100 | n 2 = 300 |
| p1 =.22 | p 2 = .11 |
| |
Use pooled estimator of p.
- What is the value of the test statistic (to 2decimals)?
- What is the p-value (to 4 decimals)? Usez-table.
