Ayala biked 12.76 miles on Sunday, 3.45 miles on Monday, and 6.52 miles on Tuesday. Over those three days, about how many miles
2 answers:
Answer:
Ayala biked approximately 23 miles in total
Step-by-step explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
To solve this question we need to calculate the total amount of miles that Ayala biked. To do this we need to add the amount of miles she biked on each day. Like so,
As we can see in the calculation above, Ayala biked 22.75 miles but the question now asks us to round to the nearest whole number. Since the first digit to the right of the decimal is a 7 then we need to round up.
Therefore, Ayala biked approximately 23 miles in total.
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Using the t-distribution, as we have the standard deviation for the sample, we have that the test statistic is given by:
At the null hypothesis, it is tested if there is no difference, that is:
At the alternative hypothesis, it is tested if there is a difference, that is:
The test statistic is given by:
The parameters are:
is the sample mean.
is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
- n is the sample size.
In this problem, is tested at the null hypothesis, and the sample is: 20, -40, -40, 0, 20, - 60, -40, hence:
.
Hence, the test statistic is:
More can be learned about the t-distribution at brainly.com/question/16313918