Answer:
answer is 9 or 1/2.
Step-by-step explanation:
Im not 100% sure I just went with my instinct.
Hope this helps!
B) 24 miles
Hope this helps
Answer:It’s just distributed.
Step-by-step explanation:
:)
I'm pretty sure it's 3 1/4 because if you add 2 1/2 and 1 1/6 it'll be 3 2/8 then if you reduce it it'll be 3 1/4
Answer:
Reject H0 if Z ≤ critical value
- 2.8747978 ≤ 1.645
Step-by-step explanation:
Setting the null and alternative hypothesis :
H0 : μ = 3.5
H1 : μ < 3.5
Sample size (n) = 40
Mean (m) = 3 minutes
Standard deviation (s) = 1.1 minutes
Test statistic : Z = (m - μ) / (s/√n)
Z = (3 - 3.5) / (1.1/√40)
Z = - 0.5 / 0.1739252
Z = - 2.8747978
Zcritical at α 0.05 = 1.645
This is a left tailed test :
Hence rejection region:
Reject H0 if Z ≤ critical value
- 2.8747978 ≤ 1.645