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beks73 [17]
3 years ago
9

In the lab tab in the data file, there is data on the IQs for first graders at a university lab school. a. Calcualte a point est

imate of the mean value of IQ for the population of first graders at this school. What estimator did you use? b. Calculate a point estimate of the IW value that separates the lowert 50% of all such students from the highest 50% of students. c. Calculate a 99% confidence interval for the population mean. What sampling distribution did you use? Why? d. Test the hypothesis that this population of first graders is not smarter nor less smart than the wider population (which has average IQ equal to 100).

Mathematics
1 answer:
charle [14.2K]3 years ago
7 0

Answer:

a. 113.72

b. 115

c. 107, 120

d. 100

Step-by-step explanation:

Hypothesis is seen as an assumption, an idea that is proposed for the sake of argument so that it can be tested to see if it might be true. In the scientific method, the hypothesis is constructed before any applicable research has been done, apart from a basic background review.

Sampling distribition can be seen as the distribution of frequencies of a range of different outcomes that could possibly occur for a statistic of a population.

Please go to attachment for the detailed analysis.

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Step-by-step explanation:

The measure of angle y is 62°.

I solve this by

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Therefore we have the equation:

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118° - 118° + y = 180° - 118°

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I solve this by

Angles 58° and x are supplementary angles.

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3 years ago
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slega [8]

Answer:

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Step-by-step explanation:

We need to solve:

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We know that |u|=a the u = a and u = -a

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german
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