ECON1193 Business Statistics Week 3

ECON1193 Business Statistics Week 3

1st - 10th Grade

11 Qs

quiz-placeholder

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ECON1193 Business Statistics Week 3

ECON1193 Business Statistics Week 3

Assessment

Quiz

Business

1st - 10th Grade

Hard

Created by

Man Pham Duy

Used 9+ times

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11 questions

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1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which of the following are examples of continuous variables? More than one option can be selected

Your parents' age

The distance from your house to RMIT

Your bank account balance

The number of pets one can have

Your weight or height

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A normal distribution has a ... shape and describes the tendency of data clustering around a central value, which is the ...

bell, population mean

bell, sample mean

circle, populations standard deviation

bell, sample standard deviation

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which of the following are characteristics of a normal distribution? Select all the correct answers

Bell-shaped

Asymmetrical

Mean = Median = Mode

Data value center at the sample mean

Spread is determined by the sample standard deviation

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement is correct when describing a standardized normal distribution?

A standardized normal distribution is known as z-distribution, which has a mean of  μ\mu  and a standard deviation of  σ\sigma  

A standardized normal distribution is known as t-distribution, which has a mean of 0 and a standard deviation of 1. 

Values above the mean have positive z-values and values below the mean have negative z-values.

None of the above

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If Assignment 1 mark is normally distributed with a mean of 60 and a standard deviation of 20, the z-value for a student who gets 85 for his/her assignment:

Z = 1

Z = -2

Z = 1.25

Z = -1.5

Z = 0

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The total area under the normal distribution curve is

1

100%

0.5

0

Either one of the first two options is correct

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Please choose the correct distribution rules of a normal distribution:

μ±2σ68.26%\mu\pm2\sigma\approx68.26\%

μ±σ95%\mu\pm\sigma\approx95\%

μ±2σ95%\mu\pm2\sigma\approx95\%

μ±3σ99.73%\mu\pm3\sigma\approx99.73\%

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