Hypothesis Testing: Analyzing the Difference of Two Means

What is the main idea behind hypothesis testing in inferential statistics?

• To disprove something by finding an exception.

• To prove something to be true.

• To collect data from the entire population.

• To avoid making any errors.

Which of the following is NOT one of the five steps in hypothesis testing?

• Deciding on the level of significance

• Collecting the entire population data

• Calculating the p-value

• Formulating hypotheses

What is the null hypothesis usually referred to as?

• The status quo or no effect

• The hypothesis with a greater-than sign

• The hypothesis we are trying to prove

• The hypothesis with no equality

In Helen's experiment, what is the population?

• All days of selling Choco-nutties

• The days in the next month

• The days she does not offer free stickers

• The days she offers free stickers

What does a two-tailed test in hypothesis testing mean?

• We are not interested in any differences

• We are interested in differences from zero in both directions

• We are only interested in decreases

• We are only interested in increases

What is the significance level commonly used in hypothesis testing?

• 0.50

• 0.10

• 0.05

• 0.01

How many days of sales figures did Helen provide for her experiment?

• 10 days

• 13 days

• 23 days

• 30 days

What was the mean sales figure for the days Helen offered free stickers?

• $301.92

• $350.00

• $265.83

• $400.00

Tags

NGSS.HS-LS3-3

What was the p-value for the two-tailed test in Helen's experiment?

• 0.01

• 0.02

• 0.10

• 0.05

What does it mean if the p-value is less than the significance level?

• We cannot make any decision

• We reject the null hypothesis

• We accept the null hypothesis

• We need more data