The manager of a grocery store took a random sample of 100 customers. the avg. length of time it took the customers in the sample to check out was 3.1 minutes with a std. deviation of 0.5 minutes. we want to test to determine whether or not the mean waiting time of all customers is significantly > 3 min. at 95% confidence, it can be concluded that the mean of the population isa. significantly greater then 3.18b. not significantly greater than 3c. significantly less than 3d. significantly greater than 3

ask the math teacher she or he would know lol.

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.