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First apply 20% discount then applied $15 coupon combination gives better deal.
As given in the question,
Let final cost of the shoes be $100
First apply $15 coupon then applied 20% discount
100-15=$85
Now, 20% of 85= (20/100) × 85
=$17
Final price, 85 - 17 =$68
First apply 20% discount then applied $15 coupon
Now, 20% of 100= (20/100) × 100
=$20
100-20 = $80
Apply coupon $15
Final price, 80 - 15 =$65
Therefore, first apply 20% discount then applied $15 coupon combination gives better deal.
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Answer:
The degrees of freedom are given by:
The p value for this case would be given by:
Step-by-step explanation:
Information given
represent the mean height for the sample
represent the sample standard deviation
sample size
represent the value that we want to test
t would represent the statistic
represent the p value for the test
Hypothesis to verify
We want to cehck if the true mean is lees than 25 mph, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic would be given by:
(1)
Replacing the info given we got:
The degrees of freedom are given by:
The p value for this case would be given by:
