Articles pertaining to questions; 1 https://fivethirtyeight.com/features/dear-mo

Question

Articles pertaining to questions; 1 https://fivethirtyeight.com/features/dear-mona-how-often-do-people-arrive-late-to-appointments/
2 https://www.huffingtonpost.com/muthi-nhlema/why-we-cant-ignore-the-ou_b_6161048.html

D Question 2 1 pts Refer to the article on outliers. Which of the following seems like a likely range of z-scores for the amount of time it took Chrissy to fill her water can? (Hint: since the mean is 99 and the smallest possible value is 0, we wouldn't expect the standard deviation to be much greater than 30.) O between-500 and-10 O between-10 and-3 O between -3 and 3 O between 3 and 10 O between 10 and 500 Question 3 1 pts Choose the best response to the following statement: "It is sound statistical practice to delete Chrissy's time to fill a jerry can from the data set O Yes because her data point does not fit a normal distribution. O Yes because the data point is obviously wrong O No because if the data point is deleted the sample size will be too small. O No because the data point is accurately measured and tells us the data are probably not normally distributed.

Explanation / Answer

2. Kindly post 1 question per post:

Mean = 99
smallest score = 0
Stdev <= 30
Chrissy score = 7200 seconds

Likely range of Z-score = 0 to 120 which means:

Z = (7200-99)/30 = 237

Since , since the standard deviation can be smaller than this,
Z can be greater than 237

Hence, option E. between 10 and 500

3. Her data point was right, although an outlier. The sample size is independent of outliers, and the sample size.
As given in the article the author is concerned about the data' fit w.r.t fit within the normal distribution.
Therefore, 1st option is correct

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