The Dot plot shows the salaries for the employees that two small companies before a new company head is hired on each company se
lect all the statements that must be true
A. the mean and the medium values of salary shown in the Dot plot for company 2 are the same.
B.the standard deviation of salary is shown in the Dot plot for company 2 is greater than the standard deviation of salaries at company 1.
C. the median values of salary shown in the dot plots for the two companies are about the same.
D.the median value of salaries at company one will remain unchanged after a company head is hired to have a salary of $500,000 (Five Hundred thousand dollars)
E.the new company head with a salary of $500,000 will affect the mean value for salaries accompany to more than the median value for salaries at company 2 more then the median value for salaries at company 2.
A. the mean and the medium values of salary shown in the Dot plot for company 2 are the same.
B.the standard deviation of salary is shown in the Dot plot for company 2 is greater than the standard deviation of salaries at company 1.
C. the median values of salary shown in the dot plots for the two companies are about the same.
D.the median value of salaries at company one will remain unchanged after a company head is hired to have a salary of $500,000 (Five Hundred thousand dollars)
E.the new company head with a salary of $500,000 will affect the mean value for salaries accompany to more than the median value for salaries at company 2 more then the median value for salaries at company 2.
1 answer:
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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.
Answer:
Step-by-step explanation:
step 1
Find the radius of the circle
we know that
A circumference of the circle subtends a central angle of 360 degrees
so
using proportion
step 2
Find the area of sector
we know that
The area of the circle subtends a central angle of 360 degrees
so using proportion
Let
x ----> the area of the sector