91影视

Does the line seem to fit the data? Why or why not?

Graph 鈥測ear鈥� vs. 鈥�# flu cases diagnosed.鈥� Do not include pre-1981. Label both axes with words. Scale both axes

The scatter plot shows the relationship between hours spent studying and exam scores. The line shown is the calculated line of best fit. The correlation coefficient is $0.69$.

Do there appear to be any outliers?

53. What effect did the potential outlier have on the line of best fit?

56. The Standard Deviation for the Sum of Squared Errors for a data set is$9.8$. What is the cutoff for the vertical distance that a point can be from the line of best fit to be considered an outlier?

For each of the following situations, state the independent variable and the dependent variable.

a. A study is done to determine if elderly drivers are involved in more motor vehicle fatalities than other drivers. The number of fatalities per$100,000$ driver is compared to the age of drivers.

b. A study is done to determine if the weekly grocery bill changes based on the number of family members.

c. Insurance companies base life insurance premiums partially on the age of the applicant.

d. Utility bills vary according to power consumption.

e. A study is done to determine if a higher education reduces the crime rate in a population.

59. The Gross Domestic Product Purchasing Power Parity is an indication of a country's currency value compared to another country. Table 12.16 shows the $GDPPPP$ of Cuba as compared to US dollars. Construct a scatter plot of the data.

60. The following table shows the poverty rates and cell phone usage in the United States. Construct a scatter plot of the data

61. Does the higher cost of tuition translate into higher-paying jobs? The table lists the top ten colleges based on mid-career salary and the associated yearly tuition costs. Construct a scatter plot of the data.

62. If the level of significance is $0.05$ and the $p$-value is $0.06$, what conclusion can you draw?