Determine the sample standard deviation.
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d. Determine the sample standard deviation.
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- 2- Calculate the Quartile Deviation (Q.D) and coefficient of Q.D. for the databelow:( 230 , 620 , 390 , 350 , 320 , 150 )find mean deviation , sample variance , standard deviationSquare of the standard deviation is called Select one: O a. Coefficient of determination b. Variance c. Square Deviation d. Mean Deviation
- Calculate the z-score for the largest value and interpret it in terms of standard deviations. Do the same for the smallest value N: 50 Mean:28.766 SE Mean: 0.476 St.Dev: 3.369 Min: 21.300 Q1: 26.375 Median: 29.400 Q3: 31.150 Max: 35.100Salaries for teachers in a particular elementary school district are normally distributed with a mean of $47,000 and a standard deviation of $4,600. We randomly survey ten teachers from that district. (Round your answers to the nearest dollar.)a. Find the 90th percentile for an individual teacher's salary b. Find the 90th percentile for the average teacher's salary.A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50. Construct a 95% confidence interval for the population standard deviation, o. Assume the data are normally distributed. Don't write the dollar sign in your answers. Lower = Upper =
- The National Football League (NFL) polls fans to develop a rating for each football game. Each game is rated on a scale from 0 (forgettable) to 100 (memorable). The fan ratings for a random sample of 12 games follow. 58 61 87 74 72 74 19 57 79 79 82 75 a. Develop a point estimate of mean fan rating for the population of NFL games (to 2 decimals). b. Develop a point estimate of the standard deviation for the population of NFL games (to 4 decimals).The National Football League (NFL) polls fans to develop a rating for each football game. Each game is rated on a scale from 0 (forgettable) to 100 (memorable). The fan ratings for a random sample of 12 games follow. 58 60 85 75 71 72 20 57 79 79 83 74 a. Develop a point estimate of mean fan rating for the population of NFL games (to 2 decimals). b. Develop a point estimate of the standard deviation for the population of NFL games (to 4 decimals).1- Computer Literacy Test If 80% of job applicants are able to pass a computer literacy test, find the mean, variance, and standard deviation of the number of people who pass the examination in a sample of 150 applicants. 2- Fuel Efficiency for U.S. Light Vehicles The average fuel efficiency of U.S. light vehicles (cars, SUVS, minivans, vans, and light trucks) for 2005 was 21 mpg. If the standard deviation of the population was 2.9 and the gas ratings were normally distributed, what is the probability that the mean mpg for a random sample of 25 light vehicles is under 20? Between 20 and 25? 3- Elementary School Teachers Women comprise 80.3% of all elementary school teachers. In a random sample of 300 elementary chers, what is the probability that less than three-fourths are women?
- The National Football League (NFL) polls fans to develop a rating for each football game. Each game is rated on a scale from 0 (forgettable) to 100 (memorable). The fan ratings for a random sample of 12 games follow. 56 60 86 75 72 72 21 57 81 79 83 73 a. Develop a point estimate of mean fan rating for the population of NFL games (to 2 decimals). b. Develop a point estimate of the standard deviation for the population of NFL games (to 4 decimals).The instructor takes a random sample of size from the population data and obtains the following sample data: x 405 385 495 385 555 470 8 The sample standard deviation is, a 69.17 b 66.51 c 63.14 d 61.49An insurance company is looking over accident statistics. They want to model the population of all drivers for the population parameter of the standard deviation and variance of the age of the driver involved in an automobile accident. They have a sample of 100 accidents from around the country. The age of the driver in each of these accidents is provided below. Use Excel to calculate the sample standard deviation and the sample variance. Round your answers to one decimal place. Do not round until you've calculated your final answer "Age of people in accident"48643346436728189044472440202747683248472248217347302918487364454920205066654187873417203176493089672222455023481746382942254720463119214227226621236675744621461969202048238851284918204522313823284939 Standard deviation: Variance:
