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I am unsure how to solve this problem and what formula
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I am unsure how to solve this problem and what formula

I am unsure how to solve this problem and what formula-example-1
User Masoom
by
8.0k points

1 Answer

2 votes

SOLUTION:

The z-score is gotten as;


Z=(x-\mu)/((\sigma)/(√(n)))

Inserting, the values we have;


Z=(7-8)/((3)/(√(25)))=-1.67

Thus, using a significance level of 0.05;

Thus, the answer is OPTION C

User Santi
by
7.3k points
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