In: Statistics and Probability
1. Jackson's new plant makes pistons where the variation in radius must be minimal. You sample 24 pistons and find a standard deviation of 1.63 mm. Assuming the radii to be normally distributed, ind:
a.The 98% confidence for the population std.dev.
2. You live near a Mac Donnel's and want to find the population parameters for the number of visits from a neighborhood similar to yours on a typical week.
a. You ask 73 on Ken's neighbor and get the mean to be 4.8 with pop.std dev of 2.1. Find the 92% confidence interval for the population mean of Mac Donnel's visitor
b. You ask 94 on Ken's neighbor and find that 67 visits regularly. Find the 84% confidence interval for the population mean of Mac Donnel's visitor