Mathematics Homework Solutions

Calculating the percent frequency. Data table in JPG format.

The percent frequency of the 60 - 80 class is: a. 12% b. 24% c. 30% d. 84% (See attached JPG)

Calculating the arithmetic mean (average) from a data set.

The number of file conversions performed by a processor per day for 10 days was: 15 27 25 28 30 31 22 25 27 29 The arithmetic mean of the data is: a. 20.7 b. 25.9 c. 27 d. 29

Calculating the trimmed mean from a set of data.

The number of file conversions performed by a processor per day for 10 days was: 15 27 25 28 30 31 22 25 27 29 The trimmed mean of the data is: a. 22.8 b. 26.63 c. 31.5 d. 34.25

Calculating the median from a set of data.

The number of file conversions performed by a processor per day for 10 days was: 15 27 25 28 30 31 22 25 27 29 The median of the data is: a. 26 b. 26.75 c. 27 d. There is no median for this data set.

Calculating the mode from a set of data.

The number of file conversions performed by a processor per day for 10 days was: 15 27 25 28 30 31 22 25 27 29 The mode of the data is: a. 25 b. 26 c. There is no mode for the data set. d. The data set is bimodal, with modes of 25 and 27.

Calculating the mean age. Data table attached in JPG format.

The mean age of the employees is: a. 37 b. 37.32 c. 37.78 d. 38.83 (See attached JPG)

Calculating the weighted mean. Data table in JPG format.

The weighted mean of the number of televisions per household is: a. 1.88 b. 2.12 c. 2.50 d. 2.60 See the attachment below for the data table.

Calculating the arithmetic mean from a data set. Data table in JPG format.

The arithmetic mean of the data is: a. 34.6 b. 14 c. 50 d. 30.4 See attachment below.

Calculating the variance from a set of data. Data table in JPG format.

The variance of the data is: a. 231.04 b. 616.64 c. 685.16 d. 1,197.16 See attachment

Calculating Standard Deviation

The standard deviation of the data is: a. 0.2 b. 26.18 c. 24.83 d. 34.61 See attachment

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