Question
How much does a school backpack cost? A random sample of 56 backpack prices has a sample mean of $21.45 with a sample standard deviation
How much does a school backpack cost? A random sample of 56 backpack prices has a sample mean of $21.45 with a sample standard deviation of s = $6.71.
- Find a 90% confidence interval for the mean price of all backpacks. (Round to two decimal places)
- Write down the calculator key you used to calculate this confidence interval.
- Interpret your result.
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Introductory Algebra
Authors: Alan S Tussy, Rosemary Karr, Marilyn Massey, Diane Koenig, R David Gustafson
5th Edition
1305161866, 9781305161863
