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sergeinik [125]
3 years ago
8

Find a number n when decreased by 9 equals 17

Mathematics
2 answers:
stira [4]3 years ago
7 0

Answer:

26-9=17           26 is the answer

Step-by-step explanation:

Genrish500 [490]3 years ago
4 0

Answer:

The number n is 26

Step-by-step explanation:

Decreased means subtract

n-9 = 17

Add 9 to each side

n-9+9 = 17+9

n = 26

The number n is 26

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Based on the sample of 500 people, 42% owned cats. Calculate the test statistic. Round to two decimal places.
Tanzania [10]

Answer:

z= 3.63

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Step-by-step explanation:

Here p = 42% = 0.42

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We formulate our null and alternative hypotheses as

H0: p= 0.42     against Ha : p> 0.42 One tailed test

From this we can find q which is equal to 1-p= 1-0.42 = 0.58

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Now using the z  test

z= p`- p/ √p(1-p)/n

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For one tailed test the value of z for  significance level = 0.05 is ± 1.645

Since the calculated value does not fall in the critical region we reject our null hypothesis  and accept the alternative hypothesis that more than 42%  people owned cats.

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