Diandra

In a sample of 171, the mean is 58 with a population standard deviation of 4.8. Can someone help me figure out what is the 90% confidence interval of the true mean? Thank you.

find the 90% confidence interval for the variance and standard deviation of the ages of seniors at Oak Park College if a sample of 24 students has a standard deviation of 2.3 years. Assume the variable is normally distributed. Can someone explain the step...

On his midterm exam, Jimmy scored 75 points, which was exactly 2 standard deviations above the mean. If the standard deviation for the test is 4, what is the mean for the test?

A Theatrical Play On the first night of the school play, the Drama Club sells 44 student tickets and 55 adult tickets and they take in a total of $416.02. On the second night, they sell 75 student tickets and 37 adult tickets and take in a total of $306.2...

When making a cylindrical can with a volume of 500ml , what dimensions will minimize the material to produce each can