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In 1974, the Bellevue-Stratford Hotel in Philadelphia was the scene of an outbreak of what later became known as legionnaires disease. The cause of the disease was finally discovered to be bacteria that thrived in the air-conditioning units of the hotel. Owners of the Rip Van Winkle Motel, hearing about the Bellevue-Stratford, replace their air-conditioning system. The following data are the bacteria counts in the air of eight rooms, before and after a new air-conditioning system was installed (measured in colonies per cubic foot of air).
The objective is to find out whether the new system has succeeded in lowering the bacterial count. You are the statistician assigned to report to the hotel whether the strategy has worked. Base your analysis on a confidence interval. Be sure to list all your assumptions, methods, and conclusions.
Construct a frequency table and display it as a histogram using a class width of 10 starting at 0. [Recall: LCB is included in the class interval whereas UCB is not included.] (Be sure to show all of your work, including your frequency chart.)
For this portion of the activity, you will export output you created while working in SPSS for Chapter 4 into a Word document. Please read the instructions below to ensure you are including the correct material in your document (This chapter ha..
Find the probability that a customer with at least two late payments will default. Based on part a, should the policy be adopted? Explain.
Which of the following formulas would you use to find the probability that a sample mean is larger than some given value? z = (x - µ) ÷ σ µ = ∑x ÷ N
a. If n=8 for both samples, find each of the sample variances, and calculate the pooled variance. Because the samples are the same size, you should find that the pooled variance is exactly halfway between the two sample variances.
The franchise has 6 hours of labor available and has contracted to get 30 lbs. of sausage and 30 lbs. of ham. The manager also plans on purchasing 16 lbs. of flour. Profit on a sausage biscuit is $.60 and $.50 on a ham biscuit. Create a model to help..
1. A random variable X is normally distributed with a mean of 37 and a standard deviation of 10.a. What is the probability that X will be more than 50?b. What is the probability that X will be more than 30?
analyze the processed data in statistical survey. below are the results of the processed data.question 1 yes p 0.1986
Can the company rely on the fact that the strength of the chemical is identical from batch to batch and from barrel to barrel and what is the mean strength of the chemical in these stored barrels? How prccisc is that estimate?
GB513 - Correlation and Simple Linear Regression - Calculate the covariance and the correlation coefficient and comment on the relationship between X and Y.
The Mann-Whitney test, or none of these tests?
In an experiment, one group of research participants is given 10 pages of material to proofread for errors. Another group proofreads the same material on a computer screen. The dependent variable is the number of errors detected in a 5 minute per..
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