1. A random sample of 150 students has a test score average with a standard deviation of 0.78. Find the error of the estimate if c=0.98.
2. In a random sample of 28 families, the average weekly food expense was $95.60 with a standard deviation of $22.50. Assume the distribution of
I greatly appreciate any one's help. These are problems I have struggled with this semester....and now that the end is winding down I would love to figure them out for future references. Thank so much to everyone!