The mean hourly manufacturing pay is shown in Table 15 for various years.
Table 15 Mean Hourly Manufacturing Pay
YearMean Hourly Pay (dollars)
1970…………………………3.24
1980…………………………7.15
1990…………………………10.78
2000…………………………14.32
2010…………………………18.61
2015…………………………19.71
Let p be the mean hourly manufacturing pay (in dollars) at t years since 1970.
a. Construct a scatterplot.
b. Is the association positive, negative, or neither? What does that mean in this situation?
c. Estimate the annual pay for a specific employee who worked 40 hours per week for 50 weeks in 2010 at a car plant. Give at least two reasons why your estimate may be in error.
d. The mean price of all goods and services increased by a factor of 6.05 from 1970 to 2010. Did the mean hourly manufacturing pay fall be- hind, approximately keep up with, or grow faster than the increase in the mean price of goods and services for that period? Explain.