Question

question 3 of 7. step 1 of 3
the dodge reports are used by many companies in the construction field to estimate the time required to complete various jobs. the company managers want to know if the time required to install 130 square feet of bathroom - tile is different from the eight hours reported in the current manual. a researcher for dodge randomly selects 56 construction workers and determines the time required to install 130 square feet of bath tile. the average time required to install the tile for the sample is 6.8 hours with a standard deviation of 4.5 hours. use a hypothesis test to determine whether the managers assumptions are substantiated by the data. use a significance level of $alpha = 0.01$. assume the population of tile installation times is approximately normally distributed.
step 1 of 3: state the null and alternative hypotheses for the test. fill in the blank below.
$h_0:mu = 8$
$h_a:mu\underline{\hspace{1cm}}8$
answer
$\
eq$
$>$
$<$

Explanation:

Step1: Identify the nature of the test

The managers want to know if the time is different from 8 hours. So it's a two - tailed test.

Step2: Determine the alternative hypothesis

In a two - tailed hypothesis test for the population mean $\mu$, if the null hypothesis is $H_0:\mu = 8$, the alternative hypothesis is $H_a:\mu
eq8$.

Answer:

$
eq$