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Answer:
(i) It represents change in expenditure by candidates A; (ii) 
Step-by-step explanation:
Answer:
where are the answers/histograms we can choose from?
Step-by-step explanation:
Answer:
269
Step-by-step explanation:
The margin of Error is E = 0.05
The level of significance is, α = 1 - confidence level = 1 - 0.9 = 0.1
Assume that the proportion is, p =0.5
From the standard normal table, observe that the critical value of Z for two tail test and 10% level of significance is 1.64
The calculation of sample size is as follows: n = (Z/E)²p(1-p)
n = (1.64/0.05)²0.5 (1 - 0.5)
n = (1.64/0.05)² 0.25
n = 1075.84 × 0.25
n = 268.96 ≈ 269
The required sample size with the given margin of error approximately is 269. This value indicates the size of the customers who are using this company’s products.
Answer:
The answer is C.
Step-by-step explanation:
The $13 he started off with is the y-intercept or the initial value, which is the point where x=0.
The x-intercept, or rate of change, is $8.50.
The slope intercept formula is y=mx+b, where m=8.5 and b=13.
The equation for this problem is y=8.5x+13.
So the answer is C