Yale has 33 set as their entrance score. Is this score (statistically) unusual?
What is the IQ for scores on the ACT? Show your work.
3
Chips Ahoy A machine that makes the Chips Ahoy cookies adds chocolate chips according to a Normal model with mean 1263 chocolate chips and standard deviation 147 chocolate chips.(per bag).
a. If the bags claim to have "more than 1000 chocolate chips!", what percent of bags are under-filled?
b. Management wants to ensure that only 1% of bags are under-filled. Consider these two scenarios.
i. Scenario 1: If the mean fill of the bags remains at 1263 chips ounces, what standard deviation does the filling machine need to have to achieve this goal?
i. Scenario 2: If the standard deviation is to remain at 147 chips, what mean does the filling machine need to have to achieve this goal?