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Each student in an experiment was told to look at 100 cars and count the number of people wearing the seat belts. The mean score for the class was found to be 44, and standard deviation =7. Now, a student reported finding 62 seat belt users out of 100. Do you think the student just made up a number rather than actually counting?
In the instance in which the selected theory of motivation was not applicable to your workplace experience, assess the need to develop and create new theoretical models of motivation in today's changing work environment.
To test whether there is any association between two variables using Chi-Square test for independence.
Explain the concept of "Regression Analysis", its types (3 types at least), applications and usefulness. Provide real application of its usage.
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hours.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Determine the minimum required sample size if you want to be 99% confident that the sample mean is within 2 units of the population mean given sigma = 7.8. Assume the population is normally distributed.
We are interested in determining whether or not the variances of the sales at two music stores (A & B) are equal. A sample of 10 days of sales at store A has a standard deviation of 30, while a sample of 16 days of sales from store B has a standar..
Use appropriate Excel functions to solve the following questions: Compute the probability of receiving four calls in a five-minute interval of time.
Calculate x2, s2 and s for the expense data. Show that the two different formulas for calculating s2 give the same result.
What is the probability that during 5 minutes interval no one will enter the store? b) what time interval is such that the probability is 0.5 that no one will enter the store during that interval?
Determine the percentage increase in his real (inflation-adjusted) salary over the last three years. Which of the 4 methods of data collection was involved when he used the Consumer Price Index?
For each set of data, calculate mean, median, mode, range, interquartile range, standard deviation, and coefficient of variation.
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