In a 2014-15 softball season, a player marked the following runs in 12 different one-day matches: 84, 25, 74, 53, 40, 31, 64, 71, 18, 63, 88, and 49. Find the standard deviation of these data. O 21.99 O 24.11 none of these O 21.31
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- The table below gives the number of hours spent watching TV last week by a sample of 24 children. 83 49 57 34 55 78 43 53 69 22 23 50 20 80 70 22 26 22 31 30 51 79 93 19 Range = Standard Deviation = Round your answers to the nearest hundredth as needed.What are the class boundaries for the class limit, 2.20 - 3.80 ? 2.15 - 3.75 2.195 - 3.805 2.395 - 3.805 1.7 - 4.2Furnace repair bills are normally distributed with a mean of 271 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find the probability that they have a mean cost between 271 dollars and 273 dollars. Round to four decimal places. A. 0.2881 OB. 0.2119 O C. 0.5517 O D. 0.7881
- Suppose that the average number of Facebook friends users have is normally distributed with a mean of 111 and a standard deviation of about 59. Assume fourteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of æ? ¤ - N( b. For the group of 14, find the probability that the average number of friends is more than 94. c. Find the first quartile for the average number of Facebook friends. d. For part b), is the assumption that the distribution is normal necessary? Yes No Submit Question logi F2 F5 3 R. T. *CO 8 7 6An instructor selected a sample of the following quiz scores(out of possible 10 points) for 12 students in one of his classes: 9 10 2 6 7 7 4 3 3 8 5 7 The standard deviation for this set of scores is what?The table below gives the number of hours spent watching TV last week by a sample of 24 children. 31 28 60 63 33 75 73 87 46 82 70 50 47 50 39 83 25 73 33 74 87 85 97 12 Range = Standard Deviation =
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- A cerlain website claims that Indian worker spends an average of 2117 hours per year. Assume the times are normally distributed, and that the standard deviation is 250 hourS. A person is classified as a heavy worker if he or she is in the upper 1 percenl. What is the least number of hours per year that makes a worker a heavy worker? Select one: O.a 2377 O b. 1857 O c. 2437 Od 1797Compute Standard deviation from the following data 60 Marks 10 20 30 40 50 No. of students 20 10 7 3 8 12K A survey found that women's heights are normally distributed with mean 63.4 in and standard deviation 2.5 in. A branch of the military requires women's heights to be between 58 in and 80 in. a. Find the percentage of women meeting the height requirement. Are many women being denied the opportunity to join this branch of the military because they are too short or too tall? b. If this branch of the military changes the height requirements so that all women are eligible except the shortest 1% and the tallest 2%, what are the new height requirements? Click to view page 1 of the table. Click to view page 2 of the table. correct: 1 C... a. The percentage of women who meet the height requirement is (Round to two decimal places as needed.)