Explain how to perform a two-sample z-test for the difference between two population means using independent samples with and sigma_{2}

At the many chips cookie company they are serious about the number of chocolate chips in their cookies they claim that each cookie hasn't c chips. if their claim is true there will be 200 chips in 10 cookies

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.