Question

Part 1:   Complete a hypothesis test:

A dietitian claims that 60% of people are trying to avoid trans fats in their diets. She randomly selected 200 people and found that 128 people stated that they were trying to avoid trans fats in their diets. At alpha=0.05 , is there enough evidence to reject the dietitian’s claim?  

1)     Hypothesize: State the null and alternative hypothesis in words and symbols.   (Ho and Ha)

2)     Prepare: State a significance level and choose a test statistic that is appropriate to test hypotheses. State and check conditions needed for any future computations (CLT).

3)     Compute: Compute the observed value of the test statistic.

4)     Compare it to what was expecting under the null hypothesis. Find the p-value to measure the level of surprise.

5)     Interpret the results.

Answer 1