Questions 6-11 are related to the following A population has a mean of 1,450 and variance of 81,796. 6If you take repeated samples of size n = 169, the standard error of the sample mean is ________. A22 B484 C1258.4 D6292 7The fraction of the means from samples of size 169 that exceed 1,475 is ________. A0.1635 B0.1469 C0.1271 D0.0951 8The fraction of the means from samples of size 169 that fall within ±30 from the population mean is ________. A0.7016 B0.7458 C0.7850 D0.8262 9The margin or error for the middle interval which captures 95% of the means from samples of size 169 is ________. A51.26 B43.12 C36.08 D28.16 10The upper end of the middle interval that captures 95% of sample means in the previous question is ________. A1,518.81 B1,506.76 C1,501.26 D1,493.12 11To obtain a margin of error of ±20 for the interval that captures 95% of the sample means, the minimum sample size is ________. A786 B794 C802 D812

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Description: Questions 6-11 are related to the following A population has a mean of 1,450 and variance of 81,796. 6If you take repeated samples of size n = 169, the standard error of the sample mean is ________. A22 B484

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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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Questions 6-11 are related to the following
A population has a mean of 1,450 and variance of 81,796.
6	If you take repeated samples of size n = 169, the standard error of the sample mean is ________.
A	22
B	484
C	1258.4
D	6292

7	The fraction of the means from samples of size 169 that exceed 1,475 is ________.
A	0.1635
B	0.1469
C	0.1271
D	0.0951

8	The fraction of the means from samples of size 169 that fall within ±30 from the population mean is ________.
A	0.7016
B	0.7458
C	0.7850
D	0.8262

9	The margin or error for the middle interval which captures 95% of the means from samples of size 169 is ________.
A	51.26
B	43.12
C	36.08
D	28.16

10	The upper end of the middle interval that captures 95% of sample means in the previous question is ________.
A	1,518.81
B	1,506.76
C	1,501.26
D	1,493.12
11	To obtain a margin of error of ±20 for the interval that captures 95% of the sample means, the minimum sample size is ________.
A	786
B	794
C	802
D	812

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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