Answer:
Step-by-step explanation:
Since π=3.14 and 1.75 should be half of π so cos(1.75) should be in the approximation of or
.
Clearly Sam's calculator is in the degree mode since
is about and obviously,
, So on the unit circle, it will be in the second quadrant.
Thus, cos(1.75) is negative.
Answer:
Option A) reject null hypothesis if z is greater than 1.645
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 250
p = 30% = 0.3
Alpha, α = 0.05
Number of women belonging to union , x = 75
First, we design the null and the alternate hypothesis
This is a one-tailed(right) test.
Rejection Region:
So, the rejection region will be
That is we will reject the null hypothesis if the calculated z-statistic is greater than 1.645
Option A) reject null hypothesis if z is greater than 1.645