Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 24 laboratory rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8. Which of the following would cause the most worry about the validity of this interval?

(a) There is a clear outlier in the data.
(b) A stemplot of the data shows a mild right skew.
(c) You do not know the population standard deviationσ.
(d) The population distribution is not exactly Normal.
(e) None of these are a problem when using a t interval.

Now the data does not mention anywhere the standard deviation which is an important parameter in using the t-procedure rather we assume that standard deviation is not known. So, the most worrying part is the skewness and the presence of strong outliers in the t-procedure.

So, the option a) is correct meaning a clear outlier in the data.

keshavgandhi04 keshavgandhi04 · Answer 2 · 2022-01-29T18:22:52+01:00

Scientists collect data on the blood cholesterol levels (milligrams per deciliter of blood) of a random sample of 24 laboratory rats. A 95% confidence interval for the mean blood cholesterol level μ is 80.2 to 89.8

According to the given options,

Statement (a) is CORRECT ,There is a clear outlier in the data

Given :

The statement relates that sample= 24

Confidence interval= 80.2 to 89.8.

Here, In the given data the standard deviation does not mention anywhere which is the important Parameter using the T-procedure we We assume here that the standard deviation is not known.

So, the most difficult part is the skewness and the strong presence outliers in the T-procedure.

Therefore, Statement(3) is CORRECT meaning a clear outlier in the data.

Learn more about Standard deviation here : https://brainly.com/question/2240137