Suppose that textbook weights are normally distributed. You measure 33 textbooks' weights, and find they have a mean weight of 75 ounces. Assume the population standard deviation is 13.3 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places.

And the 95% confidence interval would be between (69.027;80.793)    

Step-by-step explanation:

Information given

represent the sample mean

population mean (variable of interest)

represent the population standard deviation

n=33 represent the sample size  

Confidence interval

The confidence interval for the mean is given by the following formula:

  (1)

The degrees of freedom are given by:

The Confidence level is 0.99 or 99%, the significance would be and , the critical value for this case would be

And replacing we got:

And the 95% confidence interval would be between (69.027;80.793)    

i can not answer the question due to the fact that you spelled "carton" as "cartoon", a cartoon is something you watch on tv, a carton is a box that holds things. and also you've been waiting for this question for a while so why don't you get off your lazy a** and try to figure it out for yourself for once!

step-by-step explanation:

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look above, and leave your comments down below, and don't for get a five stars and a and brainliest xd

sorry for the stars in the middle of words its because it wouldn't let me submit. xd