Answer:
There is enough not evident to support dealer's claim that his sales is no more than $80.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = $80
Sample mean, = $91
Sample size, n = 20
Alpha, α = 0.05
Sample standard deviation, s = $21
First, we design the null and the alternate hypothesis
We use one-tailed t test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
The calculated test statistic is greater than the critical value, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.
Conclusion:
There is enough not evident to support dealer's claim that his sales is no more than $80.
Answer:
He can bring 6 people to the zoo.
Step-by-step explanation:
7 + 15.50x = 109
subtract 7 from both sides
15.50x = 102
divide by 15.50 on both sides
x = 6.58064516129 = 6 people
Answer:
12
Step-by-step explanation:
Use the definition of an additive inverse.
x + (-12) = 0
Add 12 on both sides.
x = 12
Answer:
<em>The answer to your question is </em><em>C. There a specific quantifiable target that we are interested in or trying to predict.</em>
Step-by-step explanation:
<u><em>I hope this helps and have a good day!</em></u>