Answer:
b) H0:μ=90, H1:μ≠90
Step-by-step explanation:
The corporation wants to know if the mean number of days is different from the 90 days claimed.
This means that at the null hypothesis, we test if the mean number is the claimed value of 90, and so:

The corporations wants to know if the mean number is different, and thus, at the alternate hypothesis, we test if the mean number is different from 90, that is:

This means that the correct answer is given by option b.
Answer:
The probability is 1/8 that you'll pick 2 yellow balls.
Step-by-step explanation:
P(Both balls not pink) = P(Both balls yellow) = 6/16 * 5/15 = 1/8
Length of the cube = 7
Working:
Cube root of 343 =7
(or)
7^3=7*7*7=343
Answer:
x= 5 whole number and 2/15
Step-by-step explanation:
1.5x + 2.5x = 240
4x 240
x = 240/4
x = 60