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 1 company 2 n1 = 80 n2 = 60 xì„1 = $10.80 xì„2 = $10.00 ïƒ1 = $2.00 ïƒ2 = $1.50 refer to exhibit 10-13. the point estimate of the difference between the means (company 1 – company 2) is

a. 8
b. –20
c. 50
d. 20

a. .8

Step-by-step explanation:

The point estimate of the difference between the means of Company 1 and Company 2 can be calculated as:

point estimate = mu1 - mu2 where

Therefore point estimate = $10.80- $10 =$ .8

d

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.