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Define validity and reliability. How can we insure our data is both reliable and valid? Which of these two do you think is the more important? Provide examples to support your reasoning.
a) What type of research uses numeric measurement data? b) What type of research uses a research hypothesis? c) What type of research does not use statistical data analysis?
a) What is the probability that for any day, the number of special orders sent out will be more than 4? b) What is the standard deviation of the number of special orders sent out daily?
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Find the value of W, the test statistic for a two sample rank-sum test that would compare the two methods for losing weight. Give the details of how you found W. Please show your step-by-step hand calculation here.
What is the predicted GPA if a person watches 12 hours of television per week?
What is an example of a normal distribution? please articulate what the example is (post the graph, picture of the graph, etc); discuss what the normal distribution means for this example, and how the graph is being used to articulate the problem.
Research question: Are mean crash damages same for these 3 vehicles? Crash1 Crash Damage ($).
The following frequency distribution reports the number of frequent flier miles, reported in thousands, for employees of Brumley Statistical Consulting, Inc. during the first quarter of 2004.
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
Complete the table and answer the following questions. Use the .05 significance level.
Five homes were recently sold in Oxnard Acres. Four of the homes sold for $400,000 while the fifth home sold for $2.5 million. Which measure of central tendency best represents a typical home price in Oxnard Acres?
An advertising agency that serves a major radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes.
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