O CONFIDENCESelecting appropriate distributions for constructing confidence..You would like to construct a 95% confidence thterval to estimate the population mean score on a nationwide examination in psychology, and for this purposewe choose a random sample of exam scores. The sample we choose has a mean of 520 and a standard devlation of 70.(a) What is the best point estimate, based on the sample, to use for the population mean?(b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the95% confidence Interval for the population mean.團(In the table, Z refers to a standard normal distribution, and t refers to at distribution.)Could useSampling scenarioUncleareither Z ortThe sample has size 15, and it is from a normally distributed populationwith an unknown standard deviation.The sample has size 85, and it is from a non-normally distributedpopulation.The sample has size 16, and it is from a normally distributed populationiha known etandard daulation of 75ExplanationCheck9656tyakx360ed. Chromebook.

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Description: O CONFIDENCESelecting appropriate distributions for constructing confidence..You would like to construct a 95% confidence thterval to estimate the population mean score on a nationwide examination in psychology, and for this purposewe choose a rando

When the sample size is large(n>30) and the population standard deviation is known use z-test.…

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The sampie has size 15, and it is from a hormally distributed population with an unknown standard devlation. The sample has size 85, and it is from a non-normally distributed population. The sample has size 16, and It is from a normally distributed population withs kn n tandsard daulstinn of 75 Explanation Check 2021 McGraw-H Education All Rights Reserved Terms of Use

The sampie has size 15, and it is from a hormally distributed population with an unknown standard devlation. The sample has size 85, and it is from a non-normally distributed population. The sample has size 16, and It is from a normally distributed population withs kn n tandsard daulstinn of 75 Explanation Check 2021 McGraw-H Education All Rights Reserved Terms of Use

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Concept explainers

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.

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Question

O CONFIDENCE
Selecting appropriate distributions for constructing confidence..
You would like to construct a 95% confidence thterval to estimate the population mean score on a nationwide examination in psychology, and for this purpose
we choose a random sample of exam scores. The sample we choose has a mean of 520 and a standard devlation of 70.
(a) What is the best point estimate, based on the sample, to use for the population mean?
(b) For each of the following sampling scenarios, determine which distribution should be used to calculate the critical value for the
95% confidence Interval for the population mean.
團
(In the table, Z refers to a standard normal distribution, and t refers to at distribution.)
Could use
Sampling scenario
Unclear
either Z ort
The sample has size 15, and it is from a normally distributed population
with an unknown standard deviation.
The sample has size 85, and it is from a non-normally distributed
population.
The sample has size 16, and it is from a normally distributed population
iha known etandard daulation of 75
Explanation
Check
96
5
6
t
y
a
kx360
ed. Chromebook.

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