A 90% confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (1.4,4.3). What is the point estimator of the mean perce…

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asked Sep 23, 2020 197k views

1 Answer

Battlmonstr · Answer 1 · 2020-09-27T03:33:52+0000

Answer: 2.85

Explanation:

Given : A 90% confidence interval for the mean percentage of airline reservations being canceled on the day of the flight is (1.4, 4.3) .

We know that the the confidence interval for population mean
$\mu$ is given by :-

$\mu\pm E$ , where E is the margin of error.

Lower limit of confidence interval =
$\mu-E=1.4$ (1)

Upper limit of confidence interval =
$\mu+E=4.3$ (2)

Adding (1) and (2), we get

$2\mu=5.7\\\\\Rightarrow\ \mu=2.85$

Hence, the point estimator of the mean percentage of reservations that are canceled on the day of the flight = 2.85