Answer:
1.4000 ;
0.0807 ;
1.69 ;
Fail to reject the Null
Step-by-step explanation:
Given :
μ = 21 minutes
x = 22.4 minutes
Sample size, n = 36
Standard deviation, s = 6
H0: μ ≥ 21
H1: μ < 21
Test statistic : (x - μ) ÷ s/sqrt(n)
Test statistic : (22.4 - 21) ÷ 6/sqrt(36)
Test statistic : 1.4 ÷ 1
Test statistic = 1.4000
Pvalue : Using the Test statistic value at α = 0.05 ; One - tail test = 0.0807
The t critical value using a critical value calculator ; DF = (n - 1) = 36 - 1 = 35 ; α = 0.05 = 1.69
Decision region :
Reject H0 if
|Test statistic| > |critical value|
1.4 < 1.69
Hence, we fail to reject H0
There isn't enough evidence they delivery time has been reduced below previous mean
It would take 9 seconds.
Substituting the values into the equation, we have:
0 = -16t² + 138t + 55
The quadratic formula is:
Inserting our information we have:
Answer:
c
Step-by-step explanation:
you would have to estimate bc you won't get an exact measurement . hope this helpssss. brainliest?
Answer:
Step-by-step explanation:
The volume of the cylinder is given by the following formula:
By comparing each variable, height and radius of the cylinder are, respectively:
