11 blue
2 green
7 brown
total is 20 card
7 out of that 20 are brown
so x out of 100% are brown
7/20=x/100 - cross multiply
700=20x
x=700/20
x=70/2
1 ft = 12 inches
20 ft = 240 inches
240/2.3 x 5.1 = 532 inches
532 / 12 = 44.3 ft
Actual house is 20 ft high and 44 feet wide
9x^2-4x-3 and x=-2
= 9*(-2)^2 - 4*-2 - 3
= (9*4)+8-3
= 36+8-3
= 44-3
=41
A, h, and b are collinear
Answer and Explanation:
Given : A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample.
The target accuracy is a variance in measurements of 1.2 or less. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.2.
To find :
1) Does this provide enough evidence to reject the claim that the lab technician’s accuracy is within the target accuracy?
2)Compute the value of the appropriate test statistic ?
Solution :
1) n=16 number of sample
The target accuracy is a variance in measurements of 1.2 or less i.e.
The variance of the measurements in the sample is 2.2 i.e.
According to question,
We state the null and alternative hypotheses,
Null hypothesis
Alternative hypothesis
We claim the alternative hypothesis.
2) Compute the value of the appropriate test statistic.
Using Chi-square,
Therefore, The value of the appropriate test statistic is 27.5.