What statistical tool should I use for this problem?  A graduating nursing student conducted a research regarding the effect of taking oral contraceptives to the blood pressure among women. She selected 40 women in her study who have not taken any contraceptives yet and 40 women who have taken contraceptives for a month, and then took their blood pressure. She analyzed the data and wanted to find out whether the blood pressure of women who took contraceptives significantly differs than those who don’t take any.

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A: Mathematical operation  Adding/subtracting

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Q: Why is it important to know what type of statistical test should be run before data is collected?

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Q: What statistical tool should be used for this problem?  1. The Director of St. Michael's Medical…

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Q: why we do not prefer to apply the spearman correlation on the quantitative variables ?

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Q: Why is it important to include a test of effect size when reporting our statistical test results?

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A: State the hypotheses.

Q: What is the value of the correlation coefficient r across the entire data set (all 10 students)?

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Q: Why do you need to understand the question before deciding the statistical tool to be used?

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Q: What statistical methods are typically used in an inferential study?

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Q: If the correlation is .8, then 40% of the variance is explained?

A: The given statement is incorrect.

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Q: Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the…

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Q: Once the correlation coefficient is known, how can we find the amount of the shared variance?

A: Concept:  correlation coefficient measures the degree of linear relationship between two variables.

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A: In testing of hypothesis, the sample size doesn’t influence the result of the test.

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