One Sample Hypothesis Testing for a Mean

What is the claimed average weight of an Oreo cookie according to Nabisco?

• 11.7 grams

• 11.1 grams

• 11.3 grams

• 11.5 grams

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

• Performing calculations

• Writing out the hypothesis

• Checking conditions

• Collecting new data

In the context of the Oreo example, what does the null hypothesis state?

• The mean weight of an Oreo is less than 11.3 grams

• The mean weight of an Oreo is greater than 11.3 grams

• The mean weight of an Oreo is not equal to 11.3 grams

• The mean weight of an Oreo is equal to 11.3 grams

What is the purpose of the 10% rule in hypothesis testing?

• To ensure the sample is random

• To check for independence

• To verify normality

• To calculate the P-value

Which condition allows the use of the Central Limit Theorem?

• Random sample

• Small sample size

• Independent sample

• Large sample size

What is the formula for the test statistic in a T-test?

• (μ - x̄) / (s / √n)

• (μ - x̄) / (σ / √n)

• (x̄ - μ) / (s / √n)

• (x̄ - μ) / (σ / √n)

Which calculator command is used to find the P-value in a T-test?

• normalCDF

• invNorm

• tCDF

• binomCDF

What should you do if your test statistic is negative?

• Ignore the test statistic

• Double the P-value

• Use negative infinity as the lower bound

• Use positive infinity as the upper bound

When do you need to double the P-value in a hypothesis test?

• When the test statistic is positive

• When the test statistic is negative

• In a two-sided test

• In a one-sided test

What is the final step in hypothesis testing?

• Calculating the test statistic

• Checking conditions

• Formulating hypotheses

• Drawing a conclusion