Answer:
Sample size = n = 37
![x= 44](https://tex.z-dn.net/?f=x%3D%2044)
![\sigma = 2.9](https://tex.z-dn.net/?f=%5Csigma%20%3D%202.9)
Now we are supposed to find that the mean number of calls per salesperson per week is more than 42?
Since n > 30 so we will use z test
![H_0:\mu\leq 42\\H_a:\mu > 42](https://tex.z-dn.net/?f=H_0%3A%5Cmu%5Cleq%2042%5C%5CH_a%3A%5Cmu%20%3E%2042)
Formula : ![z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7Bx-%5Cmu%7D%7B%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D)
Substitute the values
![z=\frac{44-42}{\frac{2.9}{\sqrt{37}}}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B44-42%7D%7B%5Cfrac%7B2.9%7D%7B%5Csqrt%7B37%7D%7D%7D)
![z=4.195](https://tex.z-dn.net/?f=z%3D4.195)
Z value at 0.100 is 1.64
Since the calculated z value is greater than the defined z value
So, we accept the null hypothesis
Hence we conclude that the mean number of calls per salesperson per week is not more than 42
Answer:
The answers should be
x^2 + 8x + 7
x(x + 8) +7
Step-by-step explanation:
(x + 7)(x + 1)
x(x) + x(1) + 7(x) + 7(1)
x^2 + x + 7x + 7
x^2 + 8x + 7
9514 1404 393
Answer:
319 in²
Step-by-step explanation:
The applicable area formula is ...
A = 1/2(g)(e)·sin(F)
A = 1/2·(12 in)(55 in)sin(75°) ≈ 319 in²
The area of the triangle is about 319 square inches.
−f(x)−5
Step-by-step explanation: