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What is the shape of a normal distribution curve?

• A) Uniform

• B) Skewed to the left

• C) Skewed to the right

• D) Bell-shaped

In a standard normal distribution, what is the mean and standard deviation?

• A) Mean = 1, Standard Deviation = 0

• B) Mean = 0, Standard Deviation = 1

• C) Mean = 0, Standard Deviation = 0

• D) Mean = 1, Standard Deviation = 1

What percentage of data falls within one standard deviation from the mean in a normal distribution?

• A) 34%

• B) 68%

• C) 95%

• D) 99.7%

What do you call a claim(assumption) about one or more population parameter?

• Hypothesis

• Illusion

• Theoretical

• Visionary

What is the total area under a normal distribution curve?

• A) 50%

• B) 75%

• C) 100%

• D) Infinite

In a normal distribution, where does the highest point of the curve occur?

• A) At the mean

• B) At the median

• C) At the mode

• D) At the standard deviation

Myla conducted a survey to all grade 6 students and claimed that their average age is 12. What should be the null hypothesis?

• A) All 12 years old students are grade 6.

• B) Not all 12 years old students are grade 6.

• C) The average age of grade 6 students is 12.

• D) The average age of grade 6 students is not 12.

Which word describes the initial claim that is based on previous analyzes or specialized knowledge?

• Alternative Hypothesis

• Null Hypothesis

• Hypothesis Testing

• Population Mean

What is the skewness of a normal distribution?

• A) Positive skewness

• B) Negative skewness

• C) No skewness

• D) Undefined

Which term refers to the measure of a characteristics of an entire population?

• Parameter

• Population

• Statistic

• Quantity