Refer to the accompanying data display that results from a simple random sample of times (minutes) between eruptions of the Old Faithful geyser. The confidence level of 95% was used. Complete parts (a) and (b) below.

a. Express the confidence interval in the format that uses the “less than” symbol. Round the confidence interval limits given that the original times are all
min
(Round to two decimal places as needed.)

Ask by Schofield Tran. in the United States

Mar 15,2025

Question

Refer to the accompanying data display that results from a simple random sample of times (minutes) between eruptions of the Old Faithful geyser. The confidence level of 95% was used. Complete parts (a) and (b) below.

a. Express the confidence interval in the format that uses the “less than” symbol. Round the confidence interval limits given that the original times are all
min
(Round to two decimal places as needed.)

Ask by Schofield Tran. in the United States

Mar 15,2025

UpStudy AI · Accepted Answer

The confidence interval in the format using the “less than” symbol is written as

$$
85.74 < \mu < 91.76.
$$

Since the original times are measured in minutes, the interval can also be written as

$$
85.74 \text{ min} < \mu < 91.76 \text{ min}.
$$
The confidence interval is $$85.74 \text{ min} < \mu < 91.76 \text{ min}$$.