Atif Z. answered • 12/11/15
Tutor
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Tutor | Data Scientist | Data Engineer | Data Creative |
Hi Hillary,
p value is used for hypothesis testing.
Here hypothesis is if the pizza store will be able to deliver the order within 30 minutes.
Atif Z.
So yes, since the null hypothesis failed.
as p-value of 0.0274 if lower than 0.05,
he is making deliveries which is taking longer than 30 minutes.
I hope this helps.
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12/11/15
Atif Z.
hold on!
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12/11/15
Atif Z.
"The owner has randomly selected 17 customers and has delivered pizzas to their homes in order to test if the mean delivery time actually exceeds 30 minutes. "
This is the reverse case!!!
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12/11/15
Atif Z.
He is testing testing if the deliveries will exceed 30 minutes NOT is the deliveries will stay within 30 minutes.
Therefore, since the p-value is 0.0274 for deliveries exceeding 30 minutes of the average delivery time or mean.
Yes, most of his deliveries are being made within the 30 minute time frame.
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12/11/15
Atif Z.
FYI. Many people decide, before doing a hypothesis test, on a maximum p-value for which they will reject the null hypothesis. This value is often denoted α (alpha) and is also called the significance level. [U Texas]
Make sure you know how significance level of the hypothesis.
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12/11/15
Atif Z.
If the p is lower than 0.05, then the H0 or null hypothesis is not true, and an alternative hypothesis is the answer.
If it is around 0.05, then the hypothesis is marginal.
12/11/15