A random sample of 82 college students were asked how many hours do they exercise in a typical week. The data was entered in the Statistix software and the descriptive statistics printouts is shown below:Descriptive StatisticsExerciseN 82Lo 93% CI 6.0925Mean 6.9878Up 93% CI 7.8831SD 4.4152Minimum 0.0000Median 6.5000Maximum 22.000Suppose it is desired to reduce the width of the confidence interval to get more accurate information. Which of the following will accomplish this goal?A. Decrease the reliability levelB. Decrease the sample sizeC. Decrease the alpha usedD. All of these would result in a narrower interval

A. Decrease the reliability level.

Step-by-step explanation:

With the same sample as the only source of information about the population, we can only make the confidence interval narrower by being less conservative about the level of confidence. The lower the level of confidence, the less reliability but the narrower the interval becomes.

If we could take a sample again, a bigger sample size tends to construct in narrower confidence intervals.

(- 1, 0 )

step-by-step explanation:

an x- intercept is where the function crosses the x- axis.

to find the x- intercept/s look for the value of x when f(x) = 0

from the given table there are 3 values of x where f(x) = 0

when x = - 1, x = 2, x = 3

the one that is listed is (- 1, 0 )

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation: