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:
You subtract Sean's mothers time from the lowest score of the women's winner age 65-69 group.
You will notice the winner of the 65=69 group is a higher value from the two but a lower value in the actual 65-69 group. Once you find that lower value you then subtract Sean's Mothers result, show the answer in difference of; time difference in seconds or minutes/seconds.
Step-by-step explanation:
Add 6 to both sides and you get your final answer.
C: 15,938 + 427 is 4 times as large as (15,938 + 427) /4
Answer:
(507.05, 592.95)
Step-by-step explanation:
Given data:
sample mean = $550, sample standard deviation S = $60.05
95% confidence interval , n = 10
For 95% confidence interval for the mean
mean ± M.E.
where M.E. is margin of error =
Substituting the values in above equation
= 2.62×18.99
=42.955
= 550±42.95
=(507.05, 592.95)