a.  Fill in the blank. If the standard deviation for a data…

a.  Fill in the blank. If the standard deviation for a data set is 6 inches, the variance is _________ (include unit). b. True or False?  All random samples are simple random samples. c.  Which of the following is more extreme: a height with a z-score of -1.74 or a weight with a z-score of 1.94?  Explain.

Heather’s grades from last semester are summarized below.  W…

Heather’s grades from last semester are summarized below.  What was her semester GPA?  Use the included table.  Do not round until the end of the problem and then round your final answer to three decimal places (the thousandths place).  Hint: Find the weighted mean.   MATH 130: 4 credits B+ WRIT 099: 3 credits C PHYS 201: 5 credits A- Grade Honors/AP A 5.0 A- 4.667 B+ 4.333 B 4.0 B- 3.667 C+ 3.333 C 3.0 C- 2.667 D+ 2.333 D 2.0 D- 1.667 F 1