A farm-equipment manufacturer wants to compare the average daily downtime (in minutes) for two sheet-metal stamping machines located in two different factories. Investigation of company records for 100 randomly selected days on each of the two machines gave the following 95% confidence interval for the difference between average daily downtime in factories A and B: (1.968, 2.674).

This means:

a. 95% of the time, the difference in daily average downtime between the factories is between 1.968 minutes and 2.674 minutes.

b. There is a 95% chance that the difference in daily average downtime is between 1.968 minutes and 2.674 minutes.

c. We are 95% certain that the average daily downtime between factories is the same.

d. We are 95% certain that the average daily downtime differs between the two factories.

e. Factory A experiences downtime about twice as often as factory B.

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?