![subject](/tpl/images/cats/mat.png)
Mathematics, 22.07.2021 22:50 alondrachon
A certain marathon has had a wheelchair division since 1977. An interested fan wondered who is faster: the men's marathon winner or the women's wheelchair marathon winner, on average. A paired t-test was performed on data from a random selection of 15 of the marathons to determine if there was evidence to indicate that the women's winning wheelchair time is faster than the men's winning running time, on average. What must be true about the population of differences in the women's wheelchair winning times and men's winning times at this marathon for conclusions from the paired t-test to be valid? Choose the correct answer below. A. The distribution of sample means of the differences will be approximately normal if there are at least 30 years of data in the sample and/or if the population of differences in winning times for all years is normal. B. Because there were at least 5 years of observations, the distribution of sample means of the differences will be approximately normal by the Central Limit Theorem. C. Because the sample size is large enough, the distribution of differences for all years will be normal. D. Because of the small sample size of differences in winning times between the women's wheelchair winner and the men's running winner, the distribution of sample means of the differences cannot be normal.
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00
In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:50
The graph shows the distance kerri drives on a trip. what is kerri's speed?
Answers: 3
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 00:00
Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?
Answers: 1
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 01:30
Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?
Answers: 2
You know the right answer?
A certain marathon has had a wheelchair division since 1977. An interested fan wondered who is fast...
Questions
![question](/tpl/images/cats/en.png)
English, 22.01.2021 23:40
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.01.2021 23:40
![question](/tpl/images/cats/pravo.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.01.2021 23:40
![question](/tpl/images/cats/mat.png)
Mathematics, 22.01.2021 23:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 22.01.2021 23:40
![question](/tpl/images/cats/User.png)
Engineering, 22.01.2021 23:40
![question](/tpl/images/cats/mat.png)
Mathematics, 22.01.2021 23:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.01.2021 23:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/pravo.png)
Law, 22.01.2021 23:40