Raj is much better at baking cookies than Jeremy. The ratio of Jeremy's to Raj's cookies became 6 : 67 after Raj baked 21 more cookies. The initial ratio was 1 : 10. Find out the number of cookies that Jeremy had.

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.