A certain type of thread is manufactured with a mean tensile strength of 73.5 kilograms and a standard deviation of 4.8 kilograms. How is the variance of the sample mean changed when the sample size is (a) increased from 64 to 900? (b) decreased from 256 to 36? (a) The sample variance from for n = 64 to for n=900. (Type integers or decimal increases
A certain type of thread is manufactured with a mean tensile strength of 73.5 kilograms and a standard deviation of 4.8 kilograms. How is the variance of the sample mean changed when the sample size is (a) increased from 64 to 900? (b) decreased from 256 to 36? (a) The sample variance from for n = 64 to for n=900. (Type integers or decimal increases
A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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I need help with this please. Units for last one is also kg or kg^2
Transcribed Image Text:A certain type of thread is manufactured with a mean tensile strength of 73.5 kilograms and a standard deviation of
4.8 kilograms. How is the variance of the sample mean changed when the sample size is
(a) increased from 64 to 900?
(b) decreased from 256 to 36?
(a) The sample variance
from
for n = 64 to
for n = 900.
(Type integers or decimal
increases
decreases
Transcribed Image Text:A certain type of thread is manufactured with a mean tensile strength of 73.5 kilograms and a standard deviation of
4.8 kilograms. How is the variance of the sample mean changed when the sample size is
(a) increased from 64 to 900?
(b) decreased from 256 to 36?
(a) The sample variance
from
for n = 64 to
for n = 900.
(Type integers or decimals. Do not round.)
kg
kg²
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