Problem 1

Yes. The P value is high, so its likely that there is no difference.

Problem 3

  1. This indicated that all values of the difference are negative, so beef hot dogs probably have more fat.

  2. That its unlikely that there isnt a difference

  3. ~10% aplpha level

Problem 5

  1. No, CI is only accounting for means.

  2. No, same as before CI only accounts for means.

  3. Yes true

  4. No, CI has nothing to do with predicting samples simply estimating true difference.

Problem 7

  1. 2.97

  2. Bigger

  3. We are 95% confident that students using the method with score 5 to 11 points higher

  4. Yes, no 0 in interval

Problem 9

H0:mC - mT = 0

HA:mC - mT Z 0

Conditions: Groups independednt, assume random assignment, sample size is lare.

Given the mean’s differences are the same, there is a 0.000001 chance that we can see the results we saw.

On average, students on the method do worse than regular kids.