Answer:
-4
Step-by-step explanation:
you will have to replace the n with -7, that means,
(-7+5)2
when a number is beside a bracket, it automatically means multiply
you will have to solve the numbers in the bracket first
-7 +5 is equal to -2
then, -2 multiplied by 2 is equal to -4
Answer:
Step-by-step explanation:
H0 : μ = 46300
H1 : μ > 46300
α = 0.05
df = n - 1 = 45 - 1 = 44
Critical value for a one tailed t-test(since population standard deviation is not given).
Tcritical = 1.30
The test statistic :(xbar - μ) ÷ (s/sqrt(n))
The test statistic, t= (47800-46300) ÷ (5600√45)
t = 1500
t = 1500 / 834.79871
t = 1.797
The decision region :
Reject H0: if t value > critical value
1. 797 > 1.30
Tvalue > critical value ; We reject H0
Hence, there is sufficient evidence to conclude that cost has increased.
Answer:
C
Step-by-step explanation:
Answer:
Not the smartest person, but the graph shows that they're pointing down!
Step-by-step explanation:
