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Part 1: Define and explain historical research. Explain a situation in which historical research would be appropriate.
Part 2: Explain the difference between external and internal evidence and give examples of each.
Part 3: Provide an explanation and an example of the following descriptive research designs:
a) Observation studies
b) Correlation research
c) Developmental designs
d) Cross-Sectional Design
e) Longitudinal Design
f) Cross-sequential
g) Survey research
h) Sampling bias
The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..
Risks and Odds in Everyday Life, James Burke claims that about 70 percent of all single men would welcome a woman taking the initiative in asking for a date. A random sample of 20 single men was asked if they would welcome a woman taking the initiati..
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
In the real world, a given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject the null hypothesis.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
Random samples of five hundred units that were selected daily from a manufacturing process produced an overall defective rate of 3.5%. Calculate the lower and upper control limits for a percentage control chart.
In teaching the role of statistical application in Health Science, the importance of reliable and valid data is very critical in research process.
What proportion for smoking teenagers think their peers care a lot about keeping their weight down?
You have 4 groups that you are trying to find if there is a difference in any of the population means. In each group there are 7 observations. The given level of significance is an alpha of .005. Your MSA is 6,200 and your MSW is 1,000. Will you r..
The following data represent the cost of electricity for the period of July 2008 for a random sample of 50 one-bedroom apartments in a large city.
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