Expressing ourselves in the context of the problem can be challenging. Especially since there isn't ONE exact way to write our sentences. There is a structure or format to it, but each individual will make that expression in their own words. Let's practice together with the following problem. After you
post, review your peers expressions to see the variety that is possible. Look for the key features but appreciate the diversity of expression.
Our Problem:
A seatbelt has been tested and found to protect 80% of passenger dummies from severe injury in a large crash testing study. Now researchers want to see
if a seat belt constructed from new material will work even better.
1) What would be the null and alternative hypotheses for this hypothesis test? Express them both in symbols and in words in the context of this problem.
2) The new seat belt is tested and the P-value is found to be 0.367 with a significance level of 5% (or 0.05). What would you conclude about the new seat
belt? Be sure to (1) state your decision regarding the null hypothesis and (2) what this means in the context of the problem.