Children between the ages of2 and 5 watch an average of25 hours of television perweek. Assume the variable isnormally distributed and thestandard deviation is 3 hours.If 20 children between theages of 2 and 5 are randomlyselected, find the probabilitythat the mean of the numberof hours they watch televisionwill be greater than 26.3hours.Roundyour answer to 4 decimalplaces.

A normal distribution follows a bell shaped curve which is centred at the mean and it is also called…

Answered: Children between the ages of 2 and 5…

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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A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations away from the mean is a value of 24? a. It is two standard deviations above the mean. b. It is two standard deviations below the mean. c. It is one standard deviation below the mean. d. It is one standard deviation above the mean.
The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the distribution of these scores is approximated by a normal distribution, about how many more if the students scored below a 60 on the test than scored above a 90?
A statistics professor gives a survey to each of the 100 students in an introductory statistics lecture. The survey asks the students how many text messages they think they sent yesterday. The data are included below. Use Excel to calculate the population standard deviation and the population variance. Round your answers to one decimal place. Do not round until you've calculated your final answer "Texts sent yesterday"61201664102313264109191657619321816148466162436641223687915924262531264199635316223464092146629424151993943696172733060372610590334274120216305567487494586257197618128101729108326212810453194623967379 Standard Deviation = Variance =
Use the normal distribution of fish lengths for which the mean is 8 inches and the standard deviation is 2 inches. Assume the variable x is normally distributed. left parenthesis a right parenthesis If 400 fish are randomly selected, how many would you expect to be shorter than 6 inches?
Using the short cut formula we learned in class, find the standard deviation of the following list of numbers. 8, 8, 8, 2, 2, 2, 2, 2, 2 Choose the answer that is closest. a. 3.0 b. 3.2 c. 3.4 d. 2.8
Determine whether the graph shown could represent a variable with a normal distribution. Explain your reasoning. If the graph appears to represent a normal distribution, estimate the mean and standard deviation. Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. OA. The graph could not represent a variable with a normal distribution because the graph skewed to the right. O B. The graph could represent a variable with a normal distribution because the curve symmetric and bell-shaped. Its mean is approximately, and its standard deviation is approximately. (Round o one decimal place as needed.) O C. The graph could not represent a variable with a normal distribution because the curve has two modes. O D. The graph could not represent a variable with a normal distribution because the graph is skewed to the left. O E. The graph could not represent a variable with a normmal distribution because the curve is constant. O F. The graph could not…
please solve: G and H ch 5
Find the number of standard deviations from the mean. Round your answer to two decimal places. The annual snowfall in a town has a mean of 35 inches and a standard deviation of 11 inches. Last year there were 60 inches of snow. How many standard deviations from the mean is that?
Find the range, the standard deviation, and the variance for the given samples. Round non-integers results to the nearest tenth. 74, 80, 76, 70, 69, 87, 59, 66, 52
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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?
Solve d please

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