Aquality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. it is known that the standard deviation in the cutting length that this machine produces is 0.20 feet. a sample of 75 cut sheets yields a mean length of 12.25 feet. this sample will be used to obtain a confidence interval for the mean length cut by machine. referring to scenario 1, the z value to use in obtaining the 95% confidence interval is approximately .
a. 2.58.
b.1.96.
c. 1.75.
d. 1.645.

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog