
Review Feb 27
Authored by Will Brooks
Science
University
Used 9+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The population distribution of variable Y is right skewed. What will be the distribution of a series of sample means with a large sample size?
Right skewed
Nearly uniform
Uniform
Approximately normal
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
State whether you would use a population distribution or a sampling distribution to solve this problem:
The weights of the eggs produced by a certain breed of hen are normally distributed with mean 65 grams and standard deviation of 5 grams.
What is the probability that one egg selected at random from a hen house will weigh more than 68 grams?
Population distribution
Sampling distribution
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
State whether you would use a population distribution or a sampling distribution to solve this problem:
The weights of the eggs produced by a certain breed of hen are normally distributed with mean 65 grams and standard deviation of 5 grams.
What is the probability that the average weight of a dozen eggs selected at random will be more than 68 grams?
Population distribution
Sampling distribution
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is Pr{Z < 0.53}?
0.7019
0.077
0.6915
0.2981
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is Pr{Z > 0.49}?
0.6879
0.6554
N/A
0.3121
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For variable Y, μ = 9.2 and σ = 2.1. What is Pr{Y < 10}?
0.6844
0.6517
N/A
0.6483
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of these is a FALSE statement about how standard deviation differs from standard error?
SD measures the spread of data within a sample. SE measures variable across multiple samples from a population.
SD can be used to show natural variability (noise). SE can be used to show measurement error.
SD is primarily a descriptive statistic. SE is primarily used in hypothesis testing.
SD is useful to see the variability in your dataset. SE is useful to tell how well your estimates describe the population.
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