Answer:
The mean waiting time of all customers is significantly more than 3 minutes, at 0.05 significant level
Step-by-step explanation:
Step 1: State the hypothesis and identify the claim.
![H_0:\mu=3\\H_1:\mu\:>\:3(claim)](https://tex.z-dn.net/?f=H_0%3A%5Cmu%3D3%5C%5CH_1%3A%5Cmu%5C%3A%3E%5C%3A3%28claim%29)
Step 2: We calculate the critical value. Since we were not given any significant level, we assume
, and since this is a right tailed test, the critical value is z=1.65
Step 3: Calculate the test statistic.
![Z=\frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }=\frac{3.1-3}{\frac{0.5}{\sqrt{100} } }=2](https://tex.z-dn.net/?f=Z%3D%5Cfrac%7B%5Cbar%20X-%5Cmu%7D%7B%5Cfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%20%7D%20%7D%3D%5Cfrac%7B3.1-3%7D%7B%5Cfrac%7B0.5%7D%7B%5Csqrt%7B100%7D%20%7D%20%7D%3D2)
Step 4:Decide. Since the test statistic , 2 s greater than the critical value, 1.65, and it is in the critical region, the decision is to reject the null hypothesis.
Step 5: Conclusion, there is enough evidence to support the claim that the mean is greater than 3
Answer:
-1
Step-by-step explanation:
divide both sides by 7 and you will get (n+4)=3
then subtract 4 on both sides and get n is equal to -1
Mean, because the outliers are limited.
There will be nights when you get more sleep or less sleep than usual, but overall, they will not be far away from the rest of the data you're comparing.
Answer:
A probability must be between zero and one.
Step-by-step explanation: