Mensa People with z-scores above 2.5 on an IQ test aresometimes classified as geniuses. If IQ scores have amean of 100 and a standard deviation of 16 points, whatIQ score do you need to be considered a genius?

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Q: n = 11 Ex=55 Ex²=2230 Give the value of the sample standard deviation.

A:

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A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

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Q: How likely is this mean to be less than 500

A: Let M denote the sample mean SAT exam score. Given that Mean = 523, SD = 89 and sample size n = 100

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A: Given DataMean = 100Standard Deviation = 15

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Q: In statistics and research, we commonly use the z-score, which is the most basic standard score. One…

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A: The pooled variance is, sp2=n1-1s12+n2-1s22n1+n2-2=55-10.822+25-10.92255+25-2=56.623278=0.7259 The…

Q: Hello. I appreciate any help. Thanks.

A: Degrees of freedom:The number of degrees of freedom is the number of values in the final calculation…

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.