Question

In recent​ years, there has been a great deal of interest in the ads that appear during a widely watched sporting event. These ads vary in length with most lasting 30 seconds or 60 seconds. The data table available below contains the ad length and ad scores​ (based on a​ 10-point maximum) from a recent event. Complete parts​ (a) through​ (e) below.

a. For the​ 30-second ads and the​ 60-second ads​ separately, construct a 95​% confidence interval estimate for the population mean ad score.

The 95​% confidence interval estimate for the population mean ad score for​ 30-second ads is ___ ≤μ ≤ ___

​(Round to two decimal places as​ needed.)

Answer 1

Answer:-

Given That:-

In recent​ years, there has been a great deal of interest in the ads that appear during a widely watched sporting event. These ads vary in length with most lasting 30 seconds or 60 seconds.

(a.) For the​ 30-second ads and the​ 60-second ads​ separately, construct a 95​% confidence interval estimate for the population mean ad score.

The 95​% confidence interval estimate for the population mean ad score for​ 30-second ads is ___ ≤μ ≤ ___

n = 849

X = 330

= 330/849

=0.3887

Standard error = se

= 0.0167

Therefore 95% CI is

= 0.3887 1.96 (0.0167)

= 0.3887 0.03273

= (0.3559, 0.4214)

Plz like it...,