1. Jackson's new plant makes pistons where the variation in radius must be minimal. You sample...

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

Solutions

Expert Solution

(2)(a)

(b)

orchestra answered 1 year ago

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