Asked by jamari

(a)
A track coach is interested in comparing two new types of running shoes, ​Shoe and Shoe , to test whether his runners perform better wearing one ​type of shoe versus the other.

To investigate, the coach recorded the times ​of runners in the -meter dash when wearing Shoe .
He then ​recorded the times for the same runners when wearing Shoe .

The ​runners’ times for the -meter dash wearing each of the two types of ​shoes are shown in the table below.
​
Shoe
A
ATime (s)​ ​11.52 11.75 12.01 11.49 12.46 11.89 12.67 12.42 12.79 11.40 ​ ​Mean Time
=
12.04
=12.04
​Shoe
B
B Time (s) 11.31 11.53 12.04 11.45 12.43 11.42 12.34 11.31 12.53 11.52 ​Mean Time
=
11.79
=11.79
​Part A
What is the difference (Shoe
A
A - Shoe
B
B) in the mean times of the ​runners when wearing Shoe
A
A versus Shoe
B
B ?
​
seconds.

All Answers 1

Answered by GPT-5 mini AI
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