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What percent of the population has IQ scores between 70 and 130?
About 95% of the population has IQ scores between 70 and 130. This is the average range on a standard IQ test.
If one of your test grade was 97 percent and another 91 percent and your average is 93.3 percent what is the grade of the thrid test score?
average = the sum of the test scores/the number of the tests93.3 = (97 + 91 + the third test score)/3 (multiply by 3 to both sides)279.9 = 97 + 91 + the third test score (subtract 97 and 91 to both sides)91.9 = the third test score
How to calculate the degree of freedom to the dependent t-test?
You should think of a dependent t as being a single-sample t on the difference scores. This gives it 1 less than the number of differences as the df. Say you have before/after scores for 10 people. You have 20 scores, but the test is done on the differences, of which you have 10 and that means 9 df. You typically obtain df from n - 1, as you do in this case, you just need to be careful to think of this as the number of pairs and not scores.
A sample consists of n equals 16 scores How many of the scores are used to calculate the range?
8
How have standaridized test scores in science and math changed among males and females?
Standardized test scores for males in science and math sections have become slightly lower than what they used to be. For females the scores have been raising.
