In order to determine whether or not there is a significant difference between the hourly wages of two companies, the following data have been accumulated. company a company bsample size 80 60sample mean $10.80 $10.00population standard deviation $2.00 @1.50refer to exhibit 10-13. the test statistic has a value of: a. 1.96b. 0.80c. 1.645d. 2.7

Option d - 2.7

Step-by-step explanation:

To find : The test statistic has a value ?

Solution :

Using test statistic formula,

Where,

is the sample mean of company A

is the sample mean of company B

is the standard deviation of company A

is the standard deviation of company B

n= 80 is the sample size of company A

n= 60 is the sample size of company B

Substitute all the values in the formula,

Therefore, The test statistic has a value of 2.7.

So, Option d is correct.

the answer to the question is a  

it has the same slope and the same y-intercept.