A key characteristic of the chi-square distribution is it is always skewed is used with only nominal scale data it is a based on left tail tests depends directly on the degrees of freedom

Followings are the explanation of the question Depends directly on the degrees of freedom The…

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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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Help me answer questions in picture with the following information below: REM (rapid eye movement) sleep is sleep during which most dreams occur. Each night a person has both REM and non-REM sleep. However, it is thought that children have more REM sleep than adults†. Assume that REM sleep time is normally distributed for both children and adults. A random sample of n1 = 9 children (9 years old) showed that they had an average REM sleep time of x1 = 2.9 hours per night. From previous studies, it is known that ?1 = 0.7 hour. Another random sample of n2 = 9 adults showed that they had an average REM sleep time of x2 = 2.00 hours per night. Previous studies show that ?2 = 0.9 hour. Do these data indicate that, on average, children tend to have more REM sleep than adults? Use a 1% level of significance.
The incomes of math tutors in a tutoring center of a university are normally distributed with a mean of $1100 and a standard deviation of $150 what percentage of tutors earn less than $900 a month
Which procedure is preferred if the procedure must be complete in 26 minutes.
nd the 30th and 98th percentile values cf a normal variable with Mean of 12_and Variance of 30 Anot This I NEED PARTBI b), Suppose we sample 3 items from this population. Find the variables that correspond to the central 85% Confident Interval range of the sum of these 3 samples.
Which procedure is preferred if the procedure must be completed within 32 minutes
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	is always skewed
	is used with only nominal scale data
	it is a based on left tail tests
	depends directly on the degrees of freedom