**Question 20:**A very large population has a mean of 55 and a standard deviation of 8. One day a sample of 40 observations is taken. On another day a sample of 100 observations is taken. Which of the following is true?- ☐ The standard error of the mean will be smaller with 40 observations.- ☐ The standard error of the mean will be larger with 40 observations.- ☐ The standard error of the mean will be the same with either 40 or 100 observations.- ☐ It is impossible to determine any of the above given the available information.

Answered: 20. A very large population has a mean…

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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9. The number of births per woman in China is 1.6 down from 5.91 in 1966. This fertility rate has been attributed to the law passed in 1979 restricting births to one per woman. Suppose that a group of students studied whether or not the standard deviation of births per woman was greater than 0.75. They asked 50 women across China the number of births they had had. The results are shown in the following table. Does the students’ survey indicate that the standard deviation is greater than 0.75? Use α = 0.01. # of Births Frequency 0 5 1 30 2 10 3 5
Please help me with this 1. Calculate the standard deviation of the set of first 5 natural numbers when n is an odd number. 2. Calculate the standard deviation of the set of first 6 natural numbers when n is an odd number.
One of the z-score formulas will help on this question. Scores on the SAT test are normally distributed with a mean of 500 and standard deviation of 100 points. Pretend someone scored 400 on the math portion of the SAT test. What would be the z-score cut off for this score? A. 1.0 B. -1.0 C. 0 D. 2.0
complete the following details please
The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days and a standard deviation of 12 days.In what range would you expect to find the middle 68% of most pregnancies?Between and .If you were to draw samples of size 31 from this population, in what range would you expect to find the middle 68% of most averages for the lengths of pregnancies in the sample?Between and .Enter your answers as numbers. Your answers should be accurate to 1 decimal places.
4. A very large population has a mean of 180 and a standard deviation of 24. One day a sample of 64 observations is taken. On another day a sample of 100 observations is taken. Which of the following is true? The standard error of the mean will be smaller with 64 observations. It is impossible to determine any of the above given the available information. The standard error of the mean will be larger with 64 observations. The standard error of the mean will be the same with either 64 or 100 observations.
For numbers 31-37, refer to the given problem. The average time it takes for a group of college students to complete a certain examination is 46.2 minutes whereas the standard deviation is 8 minutes. Fifty college students were randomly selected to take the examination. Assume that the variable is normally distributed. What is the probability that the mean. time it takes for the group to complete the test will be less than 43 minutes? 32. Wnar B. 45 33 A. & 34. What is asked in the given problem? A. P(X 43) B. P(43) 35. What formula is to be used in finding the z-score? D. z = 4 Vi A. z = -X B. z = C. z = 36. What is the answer to the question? B. 15.54% A. 0.23% C. 23% D. 34.46%
I’ve already posted this one, but I’m posting it again, because I need to be shown what to input into my TI-84 Plus calculator to solve.
Suppose the scores on an exam have a mean of 70 with a standard deviation of 10. If one student hasa test result with a z-score of -0.8 and a second student has a test result with a Z-score of 1.8, how many points higher was the second student's score than that of the first? O a. 10 O b. 20 O c. 2.6 O d. 13 O e. 26
You determine that the standard deviation for a sample of test scores is 0. This tells you that 1 all the test scores must be 0. 2 all the test scores must be the same value. 3 there is no straight-line association. 4 the mean test score must also be 0. 5 you made a mistake because the standard deviation can never be 0.
We'd like to compare two populations A and B. Population A has a mean of 40 and a standard deviation of 4. Population B has a mean of 50 and a standard deviation of 7. We will randomly select a sample of size 100 from population A, and a sample of size 100 from population B. What is the standard deviation of the difference of sample means? So, you need to find op where D =XA-Xg. Round your answers with 2 decimal digits after the decimal point, like 8.23, or 0.92, etc.
Solve question 5. Show work for it aswell please with the steps.

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