Part 3 of 6(c) Find the probability that more than 30% of the sampled teenagers own a smartphone.The probability that more than 30% of the sampled teenagers own a smartphone is 0.2666Part: 3/6Part 4 of 6(d) Find the probability that the proportion of the sampled teenagers who own a smartphone is between 0.25 and 0.30.The probability that the proportion of the sampled teenagers who own a smartphone is between 0.25 and 0.30 isPart: 4/6Part 5 of 6(e) Find the probability that less than 30% of sampled teenagers own smartphones.The probability that less than 30% of sampled teenagers own smartphones isPart: 5/6Part 6 of 6(f) Would it be unusual if less than 18% of the sampled teenagers owned smartphones?It (Choose one)XX5be unusual if less than 18% of the sampled teenagers owned smartphones, since the probability isG Smartphones: A poll agency reports that 27% of teenagers aged 12-17 own smartphones. A random sample of 85 teenagers is drawn. Round your answersto at least four decimal places as needed.Part: 0 / 6Part 1 of 6(a) Find the meanThe meanPart: 1/6Part 2 of 6is 0.27(b) Find the standard deviationThe standard deviation G is 0.0482Part: 2/6ŚXS

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Find standard deviations.
Ages of Passenger Cars The average age of passenger train cars is 19.4 years. If the distribution of ages is normal and 5% of the cars are older than 22.8 years, find the standard deviation. Round z-value calculations to 2 decimal places and final answer to 2 decimal places. The standard deviation must be years.
Annual income: The mean annual income for people in a certain city (in thousands of dollars) is 41, with a standard deviation of 28. A pollster draws a sample of 92 people to interview.
Federal Government Employee E-mail Use It has been reported that 74% of federal government employees use e-mail. If a sample of 220 federal government employees is selected, find the mean, variance, and standard deviation of the number who use e-mail. Round your answers to three decimal places. Part: 0 / 2 Part 1 of 2 (a) Find the mean. Mean: μ = X
Coffee: The National Coffee Association reported that 65% of U.S. adults drink coffee daily. A random sample of 300 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean . is 0.6500 The mean Alternate Answer: p The mean Part: 1/6 Part 2 of 6 is 0.65. 15 (b) Find the standard deviation . The standard deviation d is Español 00
Overweight Men For a random sample of 70 overweight men, the mean of the number of pounds that they were overweight was 32. The standard deviation of the population is 4.4 pounds. Part: 0 / 4 0 of 4 Parts Complete Part 1 of 4 (a) The best point estimate of the mean is how many pounds?
Coffee: The National Coffee Association reported that 62% of U.S. adults drink coffee daily. A random sample of 250 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part: 0 / 6 Part 1 of 6 (a) Find the mean µa. The mean ua is 989 P 10 MacBook Air 80 888 F7 F4
Plz solve it
How many apps? According to a website, the mean number of apps on a smartphone in the United States is 86. Assume the number of apps is normally distributed with mean 86 and standard deviation 26. Part: 0/2 Part 1 of 2 (a) What proportion of phones have more than 89 apps? Round the answer to four decimal places. The proportion of phones that have more than 89 apps is X 8 民團
Federal Government Employee E-mail Use It has been reported that 73% of federal government employees use e-mail. If a sample of 190 federal government employees is selected, find the mean, variance, and standard deviation of the number who use e-mail. Round your answers to three decimal places. Part: 0/ 2 Part 1 of 2 (a) Find the mean. Mean: μ %3D Part: 1/2 Part 2 of 2 (b) Find the variance and standard deviation. Variance: o = Standard deviation: o =
Babies: According to a recent report, a sample of 300 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is o =5.2 pounds.
Thank you for any help.

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