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Using your workplace, present or prior, or an organization with which you are affiliated, identify a quantitative and a qualitative variable of interest to you. Set up the hypotheses for the population mean and/or proportion for the variables you have selected, run the hypothesis test, and interpret your output.
Critically discuss some examples of literature reviews and statistics used and available at your work place or organization? What are they used for and how are they determined?
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?
A real estate broker hoped to develop an equation that could be used to predict the sales price of homes in a certain suburb. It seemed to him that the most important variable
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
If the population standard deviation is s = 10, is the sample sufficient to demonstrate a significant effect? Again, assume a two-tailed test with a = 0.05.
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
At the 5% level of significance test whether the bottling process is carried out accurately or whether the filling machinery needs calibration. Use both the critical and the p-value approaches.
What are some typical applications of the Binomial and the Poisson probability distribution? Explain with examples. When is the Hypergeometric distribution used?
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
Give an example of a null and alternative hypotheses. This can be a personal item or something at work. Additionally, identify the Type I and Type II Errors that could occur with your decision-making process.
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