Omar recorded the number of hours he worked each week for a year. Below is a random sample that he took from his data.

13, 17, 9, 21

What is the standard deviation for the data?

Standard deviation: s = StartRoot StartFraction (x 1 minus x overbar) squared + (x 2 minus x overbar) squared + ellipsis + (x n minus x overbar) squared Over n minus 1 EndFraction EndRoot.

A.) 0
B.) 4
C) 2
D.) 26.7

Find the multiplicative inverse of 8-12i

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.

Use the squared identities to simplify sin^2x cos^2x