Answer:
We reject the null hypothesis.
Step-by-step explanation:
We are given the following information in the question:
Sample size, n = 71
Population variance is known.
Level of significance, α = 0.08
The null and alternate hypothesis are:
We use one-tailed z test to perform this hypothesis.
Formula:
Now,
Since,
We fail to accept the null hypothesis and reject it and accept the alternate hypothesis.
Answer:
<em>is the increased number.</em>
Step-by-step explanation:
<em>The first step would be to turn the percentage into a decimal. To do that, divide it by 100.</em>
Then, multiply that by 90.
Add both together to get the increased price.
<em>:)</em>
Answer:
x ≈ 73.3
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos39° = =
( multiply both sides by x )
x × cos39° = 57 ( divide both sides by cos39° )
x = ≈ 73.3 ( to the nearest tenth )