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2. How much, on average, do full-time students pay for textbooks for a semester? Below is a random sample of the textbook costs of 25 full-time students: Data: 250, 275, 233, 175, 275, 325, 158, 265, 185, 205, 218, 125, 310, 195, 200, 245, 215, 172, 200, 275, 187, 225, 145, 150, 300. a) We wish to produce a 90% confidence interval for the mean cost (whose . value is unknown to us) of textbooks for all full-time students. Interpret b) Draw the histogram to see if your data follows a normal distribution.

          2. How much, on average, do full-time students pay for textbooks for a semester? Below is a random sample of the textbook costs of 25 full-time students: 
Data: 
250, 275, 233, 175, 275, 325, 158, 265, 185, 205, 218, 125, 310, 195, 200, 245, 215, 172, 200, 275, 187, 225, 145, 150, 300.
a) We wish to produce a 90% confidence interval for the mean cost (whose . value is unknown to us) of textbooks for all full-time students. Interpret
b) Draw the histogram to see if your data follows a normal distribution.

Added by Susana C.

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