An entrepreneur is considering the purchase of a coin-operated laundry. the current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75. a sample of 30 days reveals daily revenue of $625. if you were to test the null hypothesis that the daily average revenue was $675, which test would you use?

 z-test for population mean.

Step-by-step explanation:

Given : purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the average daily revenue was $675 with a standard deviation of $75.

So the null hypothesis and alternative hypothesis will be :-

It means the test will be for population mean.

We assume that this is normally distributed.

We know that we use t-test for sample size less than 30 and z-test for sample size greater than 30 .

Since the sample size is 30, so the test use here is z-test for population mean.

constant acceleration- a

constant velocity- c

no velocity or acceleration- b

explanation:

for body moving with a constant acceleration, the rate of change of displacement changes over time. this is proven by the increasing gradient of the curve (a) against time.

a body that is moving at constant velocity covers equal distances over equal periods of time, thus the straight line with a constant gradient c.

a stationary body   covers no displacement as time elapses. thus the flat line with   zero gradient.

add an !

step-by-step explanation: