According to an irs study, it takes a mean of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. this distribution of times follows the normal distribution and the standard deviation is 80 minutes. a consumer watchdog agency selects a random sample of 40 taxpayers. a. what is the standard error of the mean in this example? b. what is the likelihood the sample mean is greater than 360 minutes?

0.0089

Step-by-step explanation:

Given : Mean :

Standard deviation :

Sample size :

We know that the standard error of the mean is given by :-

The formula to calculate the z-score :-

For x = 360

The p-value =

Hence, the likelihood the sample mean is greater than 360 minutes= 0.0089

answer: city needs 2.4 inches of rainfall more to match the record of 40 inches.

step-by-step explanation:

since we have given that

total annual rainfall a city record = 40 inches

this year, total rainfall recorded = 37.6 inches

number of inches of rainfall   is needed to match the record of 40 inches is given by

hence, city needs 2.4 inches of rainfall more to match the record of 40 inches.

no i do not : ( what is it?