Hi everyone, I'm having a little trouble with these two questions... 1. Find the 99% confidence interval for the variance and standard deviation of the weights of 25 one-gallon containers of motor oil if a sample of 14 containers has a variance of 3.2. The weights are given in ounces. Assume...

First time here, but really need help with a statistic problem, hoping someone can really help. The question is: A utility company has 80K customers. It hires a market research firm to randomly sample 1K households and to estimate the average amount of insulation in the 80K customers home. The...

the weight, in pounds, of samples (n=6) of the contents of cans of regular and diet soda are listed below. Does there appear to be a signifacant difference between the two data sets? How might that difference be explained? Calculate the 90% confidence interval for mean weight for each type of can? ...

The weights ( in pounds) of a sample of five boxes being sent by UPS are :12,6,7,3, and 10. Compute the standard deviation. I'm not quite sure where to start with this problem What formula do I use for this problem?

On one of my homework assignments I had this question: A coin is tossed 72 times. Find the standard deviation for the number of heads that will be tossed. Could you please help me get started? Then I will be fine. Thank you, Cheryl :confused: