Hypothesis Testing Quiz

A researcher claims that the average lifespan of a particular smartphone battery is at least 20 hours.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A study is conducted to test whether a new medication lowers blood pressure more effectively than the current treatment.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

The average weight of newborn babies in a hospital is 3.2 kg.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A factory manager wants to check if the defect rate of their new production process is different from 5%.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A school administrator believes that the average math test scores of students this year are the same as last year's.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A scientist suspects that a new fertilizer will increase the crop yield of rice farms.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A car manufacturer states that their latest model has the same fuel efficiency as the previous model.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A researcher tests whether a diet program results in an average weight loss of greater than 5 kg.

• Null Hypothesis (Ho)

• Alternative Hypothesis (Ha)

A factory claims that the average weight of its cereal boxes is at least 500 grams. A quality control inspector tests a sample to determine if the average weight is actually less than 500 grams.

• Directional (One-tailed)

• Non-directional (Two-tailed)

A researcher wants to determine if the average IQ of students in a gifted program is different from 130. A random sample of students is tested to see if the mean IQ is significantly higher or lower than 130.

• Directional (One-tailed)

• Non-directional (Two-tailed)