Answer:
negative 14
Step-by-step explanation:
took the on edge
Can you put a picture of the question so that i can help you out
This is true sometimes and false sometimes, depending on the numbers.
Answer:
Test statistic = 1.664
Step-by-step explanation:
The hypothesis :
H0 : μ = 47.2
H1 : μ ≠ 47.2
Given that :
Sample mean, xbar = 47
Sample size, n = 250
Standard deviation, σ = 1.9
The test statistic :
(xbar - μ) ÷ (σ/√(n))
T = (47 - 47.2) ÷ (1.9/√(250))
T = (0.2 / 0.1201665)
Test statistic = 1.664
The car is faster because it’s 120km/hr, wile the train is 75km/hr
