3 years ago

What is the magnitude of a? 4 −4 3 −3

Mathematics

2 answers:

8090 [49]3 years ago

8 0

I think the magnitude is -3

Leya [2.2K]3 years ago

4 0

Answer:

I think -3 because the arrow actually in the -3 iam not sure I think so

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An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sa

Julli [10]

Answer:

Step-by-step explanation:

Given that IQ mean is 100 and std dev = 12 for normal adults

$Confidence level =90%\\Z critical value = 1.645\\Margin of error = 2\\Margin of error = 1.645* std error =2\\Std error = 1.216$

Std error = $\frac{12}{\sqrt{n} } =1.216$

$n=(\frac{12}{1.216} )^2 =97.38$

i.e. sample size should be atleast 97

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This is reasonable as this is greater than 30

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denis-greek [22]

Answer:

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Step-by-step explanation:

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3 years ago

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Which proportion is equivalent to a/b = c/d

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2 years ago