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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?
Simulate the arrival of cars at the service station for 20 arrivals and compute the average time between stations and Simulate the arrival of the cars at the service station for 1 hour
Suppose a marketing research firm sends questionnaires to 10 different companies. Assuming that each company, independently of the others, returns its completed questionnaire with probability 0.40, what is the probability that 5 or less questionna..
A scientist wants a confidence interval of 90% and a margin of error of +-2 for a mean of a Normal population with σ =10. What size samples should she take?
Why might driver be tempted not to use seat belt "just on this trip"?
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location.
If measurements are made over span of 9 months, and results are averaged, find out the probability that neighbourhood is considered unsafe?
The analysis of covariance (ANCOVA) is generally useful for _______________
At.05 level of significance, is there evidence to propose that mean life length of batteries produced by this manufacturer is more than 400 hours?
State the appropriate hypotheses. Obtain a test statistic and p-value. Interpret the results at ? = .01. Is normality assured? Is the difference large enough to be important?
What are independent samples? What is a pooled estimate of variance and why do you need to calculate it? When do you use a dependent versus an independent sample t test?
Review the Christian year pie chart and write a summary in which you (a) describe the significance of the holy days on the chart.
An airline estimates that 98% of people booked on their flights actually show up. If the airline books 76 people on a flight for which the maximum number is 74
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