Question: 90.The time required for ten children to learn a particular motor skill was recorded as 9, 15, 23, 20, 16, 15, 24, 18, 10, and

90.The time required for ten children to learn a particular motor skill was recorded as 9, 15, 23, 20, 16, 15, 24, 18, 10, and 20 minutes.

a. Find the mean time to learn a particular motor skill. Round your answer to the nearest whole number.

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b. Find the median time to learn a particular motor skill.Round your answer to the nearest whole number.

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c. Based on the values of the mean and median in parts (a) and (b) above, are the measurements symmetric, skewed to the right or skewed to the left?

______________

Explain.

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91.You are given the following measurements: 0.10, 0.25, 0.20, 0.15, and 0.16.

a. Multiply each of the values by 100, and calculate the sample mean for the new data. Round your answer to two decimal places.

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b. Without actually calculating the sample mean, what was the mean of the original data?Round your answer to three decimal places.

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92.A sample of eight doctors was asked how many flu shots they had given to patients this fall. The numbers of flu shots were 6, 3, 5, 24, 2, 6, 0, and 8.

a. Find the sample mean.Round your answer to two decimal places.

______________

b. Find the sample median.Round your answer to two decimal places.

_____________

c. Based on the values of the mean and median in parts (a) and (b) above, are the measurements symmetric, skewed to the right or skewed to the left?

______________

Explain.

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93.In assembling a home appliance, workers generally finish the process within 30 minutes to one hour. Occasionally, due to system failures, the assembly process takes a long time, possibly as long as 4 to 5 hours. What is the most appropriate measure of central tendency to use in this case if you want the measure to be representative of most of the observed times? ______________ Why is it the most appropriate measure? _______________________________________________________

94.The following data represent scores on a 15-point aptitude test: 8, 10, 15, 12, 14, and 13.

a. Compute the sample mean for the original data.

__________

Subtract 5 from every observation and complete the sample mean for the new data.

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b. Compute the sample variance for the original data. Round your answer to one decimal place.

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Subtract 5 from every observation and complete the sample variance for the new data.

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c. What effect, if any, does subtracting 5 from every observation have on the sample mean and sample variance?

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95.Thirty-three students were asked to rate themselves on whether they were outgoing or not using this five-point scale: 1 = extremely extroverted, 2 = extroverted, 3 = neither extroverted nor introverted, 4 = introverted, or 5 = extremely introverted. The results are shown in the table below:

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