Weight(kg) # of students 40-49 6 50-59 8 60-69 12 70-79 14 80-89 7 90-99 3.

state whether the parameter of interest is a mean or a proportion: in a survey, high school and college students are asked whether or not they use geolocation services on their smart phones.

Consider the data set: 7 8 4 2 1 3 9 3   Find the mean:   (Round your answer to 3 decimal places if necessary) Find the median:     (Round your answer to 3 decimal places if necessary)

A sales manager recorded the number of sales made by each of the 300 salespeople working athis chain of furniture outlet stores on a Saturday and created the following table.# Sales (bins) Proportion of salespeople in this bin0 – 3 0.053 – 6 0.156 – 9 0.30 9 – 12 0.3512 -15 0.15a. What is the unit of observation in this sample?b. What is the variable collected?c. Draw and label the histogram for this dataset.d. Which is the modal category?e. Calculate the proportion of the salespeople made 9 or more sales.f. Calculate the number of salespeople who made between 0 and 9 sales.