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A. What value is business research and hypothesis testing to a company? How long should it take a company to complete a scientific research study?
b. How is hypothesis testing used in politics? Explain your response. When and how would you use hypothesis testing at your place of employment?
A random sample of size 70 is drawn from population. Determine probability that mean annual salary is between $32,000 and $32,500?
Assume that respondents had been asked for party affiliation in a poll. THe responses were coded as 0 (for democra), 1 (for republican), 2 (for independent), or 3 (for any other response).
It is better to use the median rather than the mean for a distribution when:
Critically discuss some examples of descriptive statistics? Why are they used in research? What is a confidence interval?
In a market study for Target, a researcher found that 70% of customers are repeat customers. If 14 customers are selected at random, find the probability of getting.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
What is the technical definition of alpha? When might a "high level of proof" be required in business? Why does a "high level of proof" mean a small value of alpha?
Compute the value of z and state your decision regarding the null hypothesis.
They both want to know what family member typically does the research about possible honeymoon destinations, and who primarily makes the decision on selecting the destination.
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.
a) What is the probability of getting four hits in a particular game? (Round your answer to 3 decimal places.) b)What is the probability of not getting any hits in a game?
State the hypotheses for a chi-squared test in the context of this problem. Calculate the expected matrix and describe what it represents. Calculate the test statistic. Describe what this represents and answer the question posed.
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