A distance AB is observed repeatedly using the same equipment and procedures, and the results, in meters are listed. 3.8) 65.401 65.402 65.406 65.396 65.405 65.396 65.401 65.404 Calculate (a) the line's most probable length, (b) the standard deviation, and (c) the standard deviation of the mean for each set of results.

Use the sample data set to evaluate each of the steps in determining the sample standard deviation   23 20 14 35 28 Give an exact answer, not an approximation, for each step except the standard deviation. round the standard deviation to the nearest hundredth..  =   =  variance, s2 =  standard deviation, s =

12. Stem and leaf Plot: (Sample )Variable: Gas $ Key: 12 = 1:2 1 : 2 2 : 3 : 4 : 5 : 55 6 : 7 : 88 8 : 9 12a. Use the above Stem and leaf plot and calculate the range. 12b. Use the above Stem and leaf plot and calculate the Quadratic Mean. 12c. Calculate the upper fence. 12d. Estimate the standard deviation.

Assume the cholesterol levels of an adult can be described by a Normal model with a mean of 183 ​mg/dL and a standard deviation of 27. Complete parts a through e.   ​b) What percent of adults do you expect to have cholesterol levels over 190 ​mg/dL?   enter your response here   ​% ​(Round to two decimal places as​ needed.) Part 3 ​c) What percent of adults do you expect to have cholesterol levels between 150 and 160 ​mg/dL?   enter your response here   ​% ​(Round to two decimal places as​ needed.) Part 4 ​d) Estimate the interquartile range of cholesterol levels.   IQR=enter your response here   ​mg/dL ​(Round to the nearest integer as​ needed.) Part 5 ​e) Above what value are the highest​ 15% of​ adults' cholesterol​ levels?   enter your response here   ​mg/dL ​(Round to the nearest integer as​ needed.)

Steve's average golf score at his local course is 92.9 from a random sample of 60 rounds of golf. Assume that the population standard deviation for his golf score is 4.2. The standard error of the mean for this sample is ________. A)  0.54 B)  1.17 C)  1.56 D)  2.30

Assume that adults have IQ scores that are normally distributed with a mean of 97.8 and a standard deviation 22.5. Find the first quartile ​Q1, which is the IQ score separating the bottom​ 25% from the top​ 75%. (Hint: Draw a​ graph.)

Can someone please help with D and E? Thank you.