4. [0/2 Points]MY NOTESDETAILS PREVIOUS ANSWERS TANFIN12 8.3.038.ASK YOUR TEACHER PRACTICE ANOTHERThe following table gives the scores of 30 students in a mathematics examination.90-99 80-89 70-79 60-69 50-593811 <-44Find the mean and the standard deviation of the given data. Hint: Assume that all scores lying within a group interval take the middle value of thatgroup, (Round your answers to two decimal places.)mean76.5standard deviation 15.13Need Help? Read ItScoresStudentsXxWatch

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Answered: The following table gives the scores of…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find Pg, the 8th percentile. This is the bone density score separating the bottom 8% from the top 92%. Which graph represents Pg? Choose the correct graph below. O D. C. О в. O A. P8 P8 P8 P8 The bone density score corresponding to Pg is- (Round to two decimal places as needed.) Click to 3. 3.
Use the grouped data formulas to find the indicated mean or standard deviation. The speeds of a random sample of 100 cars are recorded as they pass a highway checkpoint. The results are summarized in the frequency distribution below. Approximate the sample mean. Speed (mph) Cars 30-39 6 40-49 15 50-59 51 5553 O 55.9 mph O 58.7 mph O 54.5 mph O 61.5 mph 60-69 70-79 13 15 22
Let’s assume that weight is normally distributed with a mean of 160 and a standard deviation of 25 pounds. The middle 80% 0f all people lie between which two weights?
Using your calculator, find the range and standard deviation, round to two decimals places:The table below gives the number of hours spent watching TV last week by a sample of 24 children. 75 84 49 32 59 48 69 81 34 67 78 50 46 48 83 32 29 54 21 83 47 58 91 15 a) Range = b) Standard Deviation =
Calculate the standard deviation for the following set of scores: 18, 22, 26, 22, 34, 7, 18. (Use n-1 as the denominator in your calculations.) The standard deviation for this data is: Group of answer choices
Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find P9, the 9th percentile. This is the bone density score separating the bottom 9% from the top 91%. Which graph represents P9? Choose the correct graph below.
Joey and Dee Dee bowled five games at the Rock 'n' Bowl Lanes. Their scores are given in the following table. Joey 143 170 219 157 146 Dee Dee 183 166 188 143 160 (a) Find the mean score of each bowler. (Round the answer to one decimal place.) Joey X = Dee Dee x = (b) Find the standard deviation of each bowler's scores. (Round the answer to one decimal place.) Joey S = Dee Dee s =
The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set. 1212, 1818, 2323, 1414, 1515, 1818, 1919, 1616, 1313, 1616 The range is 1111. (Simplify your answer.) The mean is 16.416.4. (Simplify your answer. Round to the nearest tenth as needed.) The variance is nothing. (Simplify your answer. Round to the nearest hundredth as needed.) The standard deviation is nothing. (Simplify your answer. Round to the nearest tenth as needed.)
The table below summarizes the number of hours a sample of college students spent watching television in the past week. Hours Frequency 10 - 12 4 13 - 15 12 16 - 18 20 19 - 21 14 Find the standard deviation.
The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in their name from a sample of 166 people. Complete the table. xx CountCount 0 45 1 43 2 32 3 46 Find the mean number of cars owned for this sample. Give your answer to at least 2 decimal places. Find the standard deviation of cars owned for this sample. Give your answer to at least 2 decimal places.
Find the mean and standard deviation for the individualized instruction scores. Scores Individualized Instruction 50 - 59 4 60 – 69 8 70 - 79 6 80 - 89 8 90 - 99 3 Mean = (Round to the nearest hundredth.)
Step 3 In order to use the defining formula for sample standard deviation, it is helpful to first calculate (x – x)² for each data value in the data set 1, 6, 7, 8, 9. Use the values in the data set and the previously determined mean, x = 6.2, to complete the following table. 7 8 6.2 6.2 6.2 6.2 6.2 х — х -5.2 0.8 2.8 (x – x)² 27.04 0.04 3.24 Submit Skip (you cannot come back)

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