Since the sum of scores must be at least 289:
72+78+70+x ≥ 289
Answer:
We reject H₀. We support that the new average credit card debt is bigger than the previous average
Step-by-step explanation:
Five years earlier
μ = 8189
σ = 690
Sample size n = 32
Recent year debt
x = 8776
Sample size n = 32
a) Hypothesis Test:
Null Hypothesis H₀ x = μ = 8189
Alternative Hypothesis Hₐ x > μ
b) z(c) Alternative Hypothesis establishes that the test is a one tail-test to the right.
z(c) for significance level α = 0.05 is from z-table z(c) = 1,64
c) z(s) = ( x - μ ) / σ /√n
z(s) = ( 8776 - 8189 ) / 690 /√32
z(s) = 587 *5,66/ 690
z(s) = 4,81
d) Comparing z(c) and z(s)
z(s) > z(c) Then z(c) is in the rejection region and we reject H₀
e) We have evidence that at 95 % of confidence the new value for the debt in credit card is now bigger than the average
Answer:
12 squares
Step-by-step explanation:
Data provided:
Dimension of the rectangle = 30 × 40
Area of the rectangle = 30 × 40 = 1200
Dimension of the area to be divided = 10 × 10
Thus,
Area of the square to be divided into = 100
Therefore,
The number of square in which it can be divided
= 
= 
= 12
Hence,
It can be divided in 12 squares
Answer:
During the 9th week
Step-by-step explanation:
Scott: 50 + (0.3)(8×25)t
= 50 + 60t
Sophia: 50 + 45t + 30(t-4)
= -70 + 75t
60t + 50 = 75t - 70
15t = 120
t = 8
After 8 weeks they will have the same amount,
Which is during the 9th week
Answer:
13
Step-by-step explanation:
You find out what is one percent then multiply from there
