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A public health researcher tested the hypothesis that providing new car buyers with child safety seats will also act as an incentive for parents to take other measures to protect their children (such as driving more safely, child-proofing the home, etc.). Dr. Joy counted all the occurrences of safe behaviors in the cars and homes of the parents who accepted the seats versus those who did not. The study found a significant difference at the .013 levels.
Another researcher did exactly the same study, and for our purposes, let's assume that everything was the same - same type of sample, same outcome measures, same car seats, and so on. Dr. Keel's results were marginally significant at the .051 level. Whose results do you trust more and why?
Under what conditions should you use the Chi-Square Test to determine whether there is a difference between proportions of two independent populations?
Statistical Hypothesis test for the given sample
The lifetimes of light bulbs of a particular type are normally distributed with a mean of 370 hours and a standard deviation of 5 hours. What percentage of bulbs has lifetimes that lie within 1 standard deviation of the mean on either side?
Differences in Descriptive and Inferential Statistics and analyze the differences between descriptive and inferential statistics.
In an article in the Journal of Management Information Systems, Mahmood and Mann investigate how information technology (IT) investment relates to company performance.
What is the 95% confidence interval for the proportion of all delinquent customer accounts at this manufacturing company?
For each of the 50 states and Washington, D.C., a number of statistics related to education are available for 1992
A brand name has 60% recognition rate. if the owner of the brand wants to verify that rate by beginning with a small sample of 5 randomly selected consumers, find the probability that exactly 3 of the 5 consumers recognize the brand name. Also fin..
Compare a tabular cum sum chart using standardized values h = 5 and k = 1/2. What is the information you learn.
Research the topic of Job Satisfaction and provide a 1 page write-up of the research highlighting where statistical analysis is being used and why it's used.
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
Provide examples of a different data collection method and a data collection instrument used in managerial research. Why is it important to ensure that these data collection methods and instruments are both reliable and valid?
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