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(Solved) MATH225 Week 3 Assignment : Standard Deviation

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Question

Which of the following lists of data has the largest standard deviation?

Select the correct answer below:

  • 22, 25, 25, 22, 25, 23, 24, 23, 26, 24
  • 13, 11, 11, 11, 10, 14, 14, 10, 11, 11
  • 16, 14, 15, 15, 16, 16, 15, 16, 18, 14
  • 25, 23, 25, 22, 21, 25, 22, 21, 25, 23
  • 7, 14, 19, 18, 4, 16, 5, 11, 11, 12

Question

The following data set represents the salaries for all six employees at a small start-up company.

Find the mean, variance, and standard deviation for this data set of salaries (expressed in thousands of dollars):

55, 59, 63, 67, 71, 75

(Round your answers to one decimal place)

Select the correct answer below:

Correct answer

Question

A company is interested to know the variation in yearly sales amount for all 5 salespeople in the company.

The dataset shown below is the sales amount sold by the 5 salespeople in the company (expressed in thousands of dollars):

40,60,65,70,80

Find the variance for this dataset.

Provide your answer below:

Answer=

Question

A large company is interested to know the variation in yearly sales for its salespeople. The dataset shown below is the yearly sales for a sample of 5 salespeople (expressed in thousands of dollars):

40, 60, 65, 70, 80

Find the variance for this dataset.

  • Round the final answer to the nearest whole number.

Answer:

Question

Which of the data sets represented by the following histograms has the smallest standard deviation?

Select the correct answer below:

Answer:

Question

Which of the data sets represented by the following histograms has the smallest standard deviation?

Select the correct answer below:

  • 30, 21, 19, 17, 16, 32, 26, 25, 19, 16
  • 5, 11, 15, 7, 5, 9, 8, 16, 14, 11
  • 25, 24, 28, 18, 32, 34, 34, 22, 28, 19
  • 17, 19, 17, 18, 17, 16, 16, 16, 17, 20
  • 9, 16, 14, 22, 20, 9, 19, 16, 21, 8

Question

Which of the data sets represented by the following histograms has the smallest standard deviation?

Select the correct answer below:

Answer:

Question

Which of the following lists of data has the largest standard deviation?

Select the correct answer below:

  • 9, 11, 13, 10, 13, 13, 13, 9, 9, 10
  • 24, 15, 21, 23, 9, 22, 12, 21, 20, 13
  • 15, 18, 18, 18, 18, 15, 15, 15, 16, 16
  • 23, 24, 23, 24, 26, 25, 26, 23, 26, 24
  • 10, 12, 13, 11, 11, 14, 14, 11, 12, 12

Question

The following data values represent the daily amount spent by a family during a 7 day summer vacation.

Find the population standard deviation of this dataset:

$96, $125, $80, $110, $75, $100, $121

Answer:

Question

The following data values represent the daily amount spent by a family during a 7 day summer vacation.

Find the sample standard deviation of this dataset:

$96, $125, $80, $110, $75, $100, $121

  • Round the final answer to one decimal place.

Answer:

Question

The data below are the monthly average high temperatures for November, December, January, and February in New York City from the Country Studies/Area Handbook Series sponsored by the U.S. Department of the Army between 1986 and 1998. What is the sample standard deviation?

54,42,40,40

  • Round the final answer to one decimal place.

Select the correct answer below:

  • 6.7
  • 3
  • 45.3
  • 136

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