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DochEvi [55]
3 years ago
15

In a given survey, 9 people said their favorite color is pink. This number represented 45% of the total people. How many total p

eople took the survey?
Mathematics
1 answer:
DiKsa [7]3 years ago
8 0

Answer:

20 total people took the survey

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let's firstly, convert the mixed fraction to improper fraction, and then subtract.


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How to Divide 986 by 26 by using partial quotients
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3 years ago
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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

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t = 1.797

The decision region :

Reject H0: if t value > critical value

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Tvalue > critical value ; We reject H0

Hence, there is sufficient evidence to conclude that cost has increased.

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