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How does a researcher determine the meaning of a score on a norm-referenced test such as an IQ test?
Why are raw scores transformed to standardized scores, such as z-scores, in order to interpret those raw scores?
How do these standardized scores help researchers to compare the scores on two different tests with different means and standard deviations?
Explain these results to a person who understands the t test for a single sample but knows nothing about the t test for independent means.
What is the probability that the cereal would be high calorie? In other words, what is P (high calorie)?
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
When is it important to have matched pairs rather than two independent sets of data?
Determine the 95% confidence interval for the population mean, based on the sample mean.
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a colour television is $90 with a standard deviation of $22. Monte's TV Sales and Service completed repairs on two sets this morning. The labor cost for the..
In the biology class the mean score was 79 with standard deviation 5.
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
What is the optimal strategy for producing 500 tons of newsprint pulp, 600 tons of packaging pulp, and 300 tons of print stock quality pulp at minimum cost?
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