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1. Why is sampling strategy important? Please provide one or two examples from your work or past experience?
2. What is the difference between the population of the study and the sampling frame? Provide an example to support your response.
3. Non probability (purposive, quota) and probability (simply random, cluster) are two very different types of sampling designs. What are the pros/cons of each design? When and why would you choose one from the other? Provide an example to support your response.
4. Why is it important to create a hypothesis before conducting research?
5. What are the differences between directional and non-directional hypothesis? Provide an example of each case.
6. What is the difference between a null hypothesis and an alternative hypothesis? Provide an example to support your response.
The standard deviation of the sample is $3,000. Interpret your findings.
It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 900 males surveyed
The data given shows daily sales at the petrol station. Compute Karl Pearson's co -efficient of skewness. Quantity sold (in litres) and No. of days. are given.
The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0.
Explain the general process and the steps included in conducting a hypothesis test? What is the difference between parametric and nonparametric hypothesis testing?
A researcher wishes to estimate with 99% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 2% of the true proportion.
Jill constructs a test to measure a personality state. The test consists of multiple items which sum up to indicate the degree of the trait that is present.
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
If an apartment is selected at random, what is the probability that it is not a 2 bedroom apartment on the 2nd floor?
The consumer advocate claim that 80% of cable televion subcribers are not satisfied with their cable service. In the attempt to justify this claim, a arbitarily chosen sample of cable subcribers will be polled in this issue.
Find the value of x that corresponds to each of these standard scores z = -1.85.
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