Mean of Frequency Distribution

It is assumed that the frequency of each interval is centred around its

• mid point

• lower limit

• upper limit

• none of the above

Given this data distribution...(check all that apply)

• mean = median

• mean is greater than the median

• this data is skewed to the left

• this data is skewed to the right

What is the mean mark for the above distribution?

• 4.4

• 4.45

• 4.5

• 4.55

What is the formula for mean of a frequency distribution?

What is the calculation for mean?

Estimate the average hourly wage to the nearest dollar

• $54.86

• $54.00

• $55.00

• $54.85

The hourly wages for a group of workers is shown in the frequency table.

List the mid-point for each interval.

(a)  

The data presented in the table have a mean value of:

• 172

• 161

• 157

• 184

The table shows the distribution of the number of hours worked each week (on average) for a sample of 100 community college students. The mean

• 50

• 34.6

• 20

• 36.8

This data represents the age distribution of a sample of 100 people covered by health insurance (private or government). The sample was taken in 2003. The mean of this data set is

• 52

• 25

• 44

• 32