5. Rochelle got a score of 55 which is equivalen 70th percentile in a mathematics test. Which the following is NOT true? A. She scored above 70% of her classmate B. Thirty percent of the class got scores of and above. C. If the passing mark is the first quartile, passed the test. D. Her score is below 5th decile.

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Q: Let n-10 , S=16 , d'=0.3, then the test statistic for testing the difference between two population…

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Q: In a sample of n= 6 scores, five of the scores are each above the mean by one point. Where is the…

A: The mean of a data can be obtained as follows:

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Q: Running Time School Average Running Time School Standard Deviation Kia 4.9 5.2 0.15 Alejandra 4.2…

A: Formula for z score: z=score-AverageStandard deviation

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A:

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A: Let P75 denote the 75th percentile i.e below which 75% of hotels rate are set.

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A: Given, On a psychology exam with μ =76 and σ=12, Tom scored 9 points below the mean(M), Mary had a…

Q: What percentage of scores fall between the following z scores: -1 to +1; -1 to +2; and -1 to +3?

A: a) -1 to +1 = P(-1<z<1) = P(Z<1)-P(Z<-1)  =0.8413-0.1587 =0.6826 =68.26%

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A: Given : Marks below 10 below 20 below 30 below 40 below 50 Number of student 20 45 115 210 325

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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.