Alab technician is tested for her consistency by making multiple measurements of the cholesterol level in one blood sample. the target precision is a standard deviation of 1.2 mg/dl or less. if 12 measurements are taken and the standard deviation is 1.8 mg/dl, is there enough evidence to support the claim that her standard deviation is greater than the target, at = .01? (show the answers to all 5 steps of the hypothesis test.)

Step-by-step explanation:

Given precision is a standard deviation of s=1.8, n=12,  target precision is a standard deviation of σ=1.2

The test hypothesis is

H_o:σ <=1.2

Ha:σ > 1.2

The test statistic is

chi square =

=

=24.75

Given a=0.01, the critical value is chi square(with a=0.01, d_f=n-1=11)= 3.05 (check chi square table)

Since 24.75 > 3.05, we reject H_o.

So, we can conclude that her standard deviation is greater than the target.

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation: