Trisha had the following seven distances (in feet) in the triple jump.
2 answers:
<h2>Answer:</h2>
Mean= 29.3
and MAD= 1.5
<h2>Step-by-step explanation:</h2>The data point is given by:
29, 30, 28, 32, 28, 31, 27
The mean of the data point is the average of the data points i.e. it is the ratio of sum of the data points to the total number of data points.
and Mean absolute deviation i.e. MAD is calculated in following steps:
1) Calculate the mean.
2) Find the absolute difference of each data points from the mean.
3) find the mean of these absolute difference.
The mean of the data points is:
Now,
|29-29.3|=0.3
|30-29.3|=0.7
|28-29.3|=1.3
|32-29.3|=2.7
|28-29.3|=1.3
|31-29.3|=1.7
|27-29.3|=2.3
The mean of these absolute difference i.e. MAD is:
which to the nearest tenth is: MAD=1.5
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Answer:
The test is not significant at 5% level of significance, hence we conclude that there's no variation among the discussion sections.
Step-by-step explanation:
Assumptions:
1. The sampling from the different discussion sections was independent and random.
2. The populations are normal with means and constant variance
There's no variation among the discussion sections
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Residuals 189 7584.11 40.13
Test Statistic =
Since our p-value is greater than our level of significance (0.05), we do not reject the null hypothesis and conclude that there's no significant variation among the eight discussion sections.
Answer:
Step-by-step explanation:
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Fourth answer choice is right.