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The percent of female wage and salary workers who are paid hourly rates is given...
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The percent of female wage and salary workers who are paid hourly rates is given in Table below for the years 1979 to 1992.
| Year | Percent of workers paid hourly rates |
| 1979 | 61.2 |
| 1980 | 60.7 |
| 1981 | 61.3 |
| 1982 | 61.3 |
| 1983 | 61.8 |
| 1984 | 61.7 |
| 1985 | 61.8 |
| 1986 | 62.0 |
| 1987 | 62.7 |
| 1990 | 62.8 |
| 1992 | 62.9 |
(a) Using "year" as the independent variable and "percent" as the dependent variable, draw a scatter plot of the data.
(b) Does it appear from inspection that there is a relationship betweenthe variables? Why or why not?(c) Calculate the least-squares line. Put the equation in the form of y = a + bx(d) Find the correlation coefficient. Is it significant?(e) Find the estimated percents for 1991 and 1988.(f) Based on the data, is there a linear relationship between the year andthe percent of female wage and salary earners who are paid hourly rates?(g) Are there any outliers in the data? (i) What is the slope of the least-squares (best-fit) line? Interpret the slope. What is the estimated percent for the year 2050? Does theleast-squares line give an accurate estimate for that year?