The 2010 General Social Survey asked the question, "After an average work day, about how many hours do you have to relax or pursue activities that you enjoy?" to a random sample of 1,155 Americans. The average relaxing time was found to be 1.65 hours. Determine which of the following is an observation, a variable, a sample statistic, or a population parameter.

a. Observation= An American in the sample.

b. Variable= Number of hours relaxing after a work day.

c. Sample statistic= 1.65

d. Population parameter= Average number of hours all Americans spend relaxing after the days work.

Step-by-step explanation:

-Observation is the value of something that interests the researcher.

- Variable is the characteristic of the unit being observed by the researcher which is number of hours relaxing after the day's work.

- Sample statistic is the value of the estimate of the descriptive statistic in a sample which is the mean of relaxing hours (1.65).

- Population parameter is the numeric value for a given population and in this, it is the Average numeric hours all Americans spend relaxing at work.

answer: -2+√x,-2-√x

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she drove 134 miles

step-by-step explanation: