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- 1. Multiple Choice
Between a Population and Sample: which size is bigger ?
Population
Sample
Both can be the same
Not enough information
- 2. Multiple Choice
If you are given the population standard deviation, what should be the minimum size of the sample?
30
30 or more
it doesn't matter
not enough information
- 3. Multiple Choice
Depending on the information given, select the cases where you won't be able to calculate the interval of the population mean
- 4. Multiple Choice
What is the lowest recommended confidence interval one should use to predict the population mean?
90%
95%
50%
any percentage is fine
- 5. Multiple Choice
If looking for 0.0077 in the table, which value of z should you use?
-2.43
-2.42
-2.425
not enough information
- 6. Multiple Choice
If looking for 0.0324 in the table, which value of z should you use?
-1.84
-1.85
-1.845
not enough information
- 7. Multiple Choice
What´s the margin of error?
not enough information
- 8. Multiple Choice
What data relates to the given problem?
We measure the heights of 40 randomly chosen men and got a mean height of 175cm. The population variance is 25 cm. With a 99% confidence level, determine the average height of all men.
- 9. Multiple Choice
If using a 95% confidence level, what value of z should you use?
- 10. Multiple Choice
Which symbol represents the mean of a sample?
- 11. Multiple Choice
Which symbol represents the variance of a sample?
- 12. Multiple Choice
If using a 99% confidence level, what value of z should you use?
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