Homework Help: statistics

Posted by Livia on Sunday, November 27, 2011 at 9:05pm.

You measure 34 turtles' weights, and find they have a mean weight of 66 ounces. Assume the population standard deviation is 9.3 ounces. Based on this, construct a 90% confidence interval for the true population mean turtle weight.

Give your answers as decimals, to two places

statistics - PsyDAG, Monday, November 28, 2011 at 11:38am
90% = mean ą 2.035 SD

2.035 was found by finding table in the back of a statistics text labeled something like "areas under normal distribution" to find the proportion (.45) between score and mean to get the Z score (value in terms of standard deviation).

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