Review Feb 23

Review Feb 23

University

7 Qs

quiz-placeholder

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Review Feb 23

Review Feb 23

Assessment

Quiz

Science

University

Practice Problem

Hard

Created by

Will Brooks

Used 7+ times

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7 questions

Show all answers

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 the central limit theorem or the normal distribution:
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?

Central limit theorem

Normal Distribution

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

State whether you would use the central limit theorem or the normal distribution:
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? 

Central limit theorem

Normal distribution

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What is Pr{Z < 0.53}?

0.7019

0.077

0.6915

0.2981

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What is Pr{Z > 0.49}?

0.6879

0.6554

N/A

0.3121

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

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 a descriptive statistic. SE is 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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