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Suppose that a claim is made that the average billionaire is 60 years old or younger.The following is a random sample of billionaires' ages, 80, 70, 76, 54, 59, 52, 74, 64, 76, 67, 39, 67, 43, 62, 57, 91, 55.Conduct the test using the 0.05 level of significance.
How would you use the concept of probabilities to apply to profiles for hiring more satisfied individuals?
Find or create a data set that would allow you to explain what is meant by mean, median and mode. Make sure to also show any calculations or formula necessary. Describe or provide as much information on the data set as possible.
The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later.
What are confounds? Give an example of a design that has three confounds. Describe three ways to alter the design to address these confounds and explain the advantages and disadvantages of each.
How would you go about studying a nonlinear or curvilinear relationship between two variables using contingency tables and chi-square tests? Provide examples from you own professional experience.
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
What is the probability she received 5 or more email during the same period?
A study was conducted with 35 people that resulted in a mean of 22.1 minutes with a standard deviation of 1.9 minutes. Using a .05 significance level, test the claim that the mean amount of time relief will be felt is less than 25 minutes.
Before starting the trial, a pilot study is conducted involving 7 participants. Is there a statistically significant difference in blood pressures overtime? Run the test at a 5% level of significance.
The registrar of a college with a population of N=4,000 full-time students is asked by the president to conduct a survey to measure satisfaction with the quality of life on campus.
Suppose a product must go through a sequential assembly line made up of ?ve operations. The time it takes to complete each operation is normally distributed with a mean of 180 seconds and standard deviation of 5 seconds.
What purpose does a multiple regression analysis serve? Give an example of how it might be used in marketing research.
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