QUESTION 7 Nabisco claims that Chip Ahoy Cookies have an x=28.67 per cookie with a SD=2.67. Assuming this information is true, what is the population parameter fa the standard deviation? QUESTION 8

This is part A: population  mean= 30.23  population standard deviation 13.84 sample size= 25 sample mean 33.17 How likely were we to draw a sample from part A, given the true average weight gain in the population was in fact 30.23?

Section 6.1 (please help with TI-84 calculator commands) A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers.  To determine this estimate, the publisher takes a random sample of 15 people and obtain the results below.  From past studies, the publisher assu;mes standard deviation is 1.9 minutes and that the population of times is normally distributed. 10   6  7   7  12    9   12   11  11   11   11  8   9    9   8 Construct the 90% and 99% confidence intervals for the population mean.  Which interval is wider? If convenient, use technology to construct the confidence intervals. The 90% confidence interval is _________ , ____________. (Round to one decimal place as needed) The 99% confidence interval is __________, ____________ (round to one decimal place as needed) Which interval is wider? The 99% confidence interval or The 90% confidence interval

number 10