Answer: 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.
The answer is c because it is the inverse of the function.
Answer: (a)
Step-by-step explanation:
Given
The pattern is 2, 4, 16, 256...
From the pattern, we can see that the next term is square of the previous i.e.
So, for the term, the function is
For the next term, it is
So,
Answer:
150
Step-by-step explanation:
Angle A= angle b
8x-10=3x+90
5x=100
x=20
Angle B=150
Answer:
-9.6-7.3 = -16.9
Step-by-step explanation: