i myopenmathcom 2' .Question1 v ' a 0/3 p15 '0 20 Q 99 Details Find the range, sample standard deviation and inter-quartile range (IQR) of the following data set. 25 29 33|34|36I36 95 96 99100 range = [: (Please enter an exact answer.) standard deviation (3) = :] (Round to one decimal place.) IQR = :] (Please enter an exact answer.) A new number, 234, is added to the data set above. Find the range, sample standard deviation and IQR of the new data set. range = :] (Please enter an exact answer.) standard deviation = S (Round to one decimal place.) IQR = [: (Please enter an exact answer.) Which measure of spread is less affected by the addition of the extreme observation? 7' IQR \"T; Range \"T; standard deviation Question Help: El Video 1 Q Read 1 lg Read 2 8 Message instructor Submit Question ' Jump to Answer ' igl- i myopenmathcom 2' 0 Question 3 . l a 0/3 pts 0 20 8 99 (D Details For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 23 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 3.3 hours. Use the Empirical Rule to answer the following questions. a) 68% of the students spend between C] hours and D hours on Statistics each week. b) 95% of the students spend between C] hours and C] hours on Statistics each week. c) 99.7% of the students spend between [:] hours and [:1 hours on Statistics each week. Question Help: @ Written Example 8 Message instructor _l umpAnstowe ,l igl- i myopenmathlcom 2' 0 Question 4 v l a 0/3 pts .0 20 3 99 (D Details The highway mileage (mpg) for a sample of 11 different models of a car company can be found below. 4o 34 49|28|20|38 29 23 38 22 41 Find the mode: [: Find the midrange: :] Find the range: :] Estimate the standard deviation using the range rule of thumb: [: Now use technology, find the standard deviation: [: (Please round your answer to 2 decimal places.) Question Help: [a Written Example 8 Message instructor Submit Question l Jump to Answer l iii- : myopenmathlcom B 0/2 pts '0 20 3 99 Details Find the range and standard deviation. The table below gives the number of hours spent watching TV last week by a sample of 24 children. Range = C] (Please enter an exact answer.) Standard Deviation = C] (Please show your answer to 4 decimal places.) Question Help: El Video 1 Q Read 1 Q Read 2 a Message instructor myopenmath.com Question 6 0/3 pts ' 20 99 0 Details For the data below, which represents a sample with n = 9, answer the questions. Round to 4 decimal places where possible. X 10.4 11.1 16.3 20.9 8.4 15 29.9 13.4 20.7 Find the mean: Find the median: Find the standard deviation: Question Help: Video 1 B Read 1 B Read 2 Message instructor Submit Question Jump to Answer myopenmath.com Question 7 0/3 pts ' 20 99 0 Details The ages of Samantha's five cousins are listed below. 14 7 12 19 18 1) Calculate the mean. 2) Fill in the table below: Fill in the differences of each data value from the mean, then the squared differences. x - H ( 20 - 1 ) 2 14 7 12 19 18 [(2 - 14)2 = 3) Calculate the population standard deviation (o). o : (Please round your answer to two decimal places) N Question Help: Written Example Message instructor Submit Question Jump to