percentile of a t distribution with 54 df.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
please only answer 7.8

Transcribed Image Text:**Renal Disease**
The mean serum-creatinine level measured in 12 patients 24 hours after they received a newly proposed antibiotic was 1.2 mg/dL.
**7.1** If the mean and standard deviation of serum creatinine in the general population are 1.0 and 0.4 mg/dL, respectively, then, using a significance level of 0.05, test whether the mean serum-creatinine level in this group is different from that of the general population.
**7.2** What is the p-value for the test?
**7.3** Suppose the sample standard deviation of serum creatinine in Problem 7.1 is 0.6 mg/dL. Assume that the standard deviation of serum creatinine is not known, and perform the hypothesis test in Problem 7.1. Report a p-value.
**7.4** Compute a two-sided 95% CI for the true mean serum-creatinine level in Problem 7.3.
**7.5** How does your answer to Problem 7.4 relate to your answer to Problem 7.3?
**7.6** Suppose \(\frac{\overline{x} - \mu_0}{s / \sqrt{n}} = -1.52\) and a one-sample t test is performed based on seven subjects. What is the two-tailed p-value?
**7.7** Use a computer program to compute the probability that a t distribution with 36 df exceeds 2.5.
**7.8** Use a computer program to compute the lower 10th percentile of a t distribution with 54 df.
Expert Solution

Step 1
Given that
Degree of freedom =df =54
And 10% percentile.
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