A90% confidence interval for the mean percentage of
airlinereservations being canceled on the day of the flight is
(3.6%,6.1%). what is the point estimator of the mean percentage
ofreservations that are canceled on the day of the flight?

 The point estimator of the mean percentage  of reservations that are canceled on the day of the flight is 4.85% .

Step-by-step explanation:

Given : A 90% confidence interval for the mean percentage of  airline reservations being canceled on the day of the flight is  (3.6%,6.1%).

We know that the sample mean is the best estimate of the population mean.

The point estimator of mean is half of the sum of limits of the confidence interval.

The sum of the limits of the confidence interval = 3.6%+6.1% =9.7%

The , Point estimator of mean = (sum of the limits) ÷ 2

= (9.7%) ÷ 2 = 4.85%

Hence, the point estimator of the mean percentage  of reservations that are canceled on the day of the flight is 4.85% .

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

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