Q.3.2 - The Practice of Statistics for AP

Question

What inference method will you use? Check that the conditions for using this procedure are met. 

Step-by-Step Solution

Answer

Here, population is normal. Thus, the t-confidence interval could be computed here.

Step 1: Given information

Given in the question that,  Biologists studying the healing of skin wounds measured the rate at which new cells closed a cut made in the skin of an anesthetized newt. Here are data from a random sample of 18 newts, measured in micrometers (millionths of a meter) per hour:

$20 29 27 34 40 22 28 14 35 26 35 12 30 23 18 11 22 23 33$

Step 2: Explanation

 The dataset is

$29$

$27$

$34$

$40$

$22$

$28$

$14$

$35$

$36$

$35$

$12$

$30$

$23$

$18$

$11$

$22$

$23$

$33$

Here, decisions about the mean healing rate are to be computed. Thus, the appropriate method for the inference is the t-interval.

The conditions to compute the T-interval is that either the example size be over $30$ or the population must be normal. Here, population is normal. Thus, the t-confidence interval could be computed here.