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A consultant is beginning work on three projects. The expected profits from these projects are $ 37. thousand, $ 68. thousand, and $ 28. thousand.
The associated standard deviations are $ 8. thousand, $ 10. thousand, and $ 2. thousand. Assuming independence of outcomes, find the mean and standard deviation (in thousands of $) of the consultant's total profit from these three projects.
Round off your answer to two decimal places.
At the 5% level of significance, test whether the proportion of internet users paying bills online is now more than 50%.
The time to complete a construction project is normally distributed with a mean of 60 weeks and a standard deviation of 4 weeks. What is the probability the project will take longer than 65 weeks?
Calculate the probability of a type ii error for the following hypotheses when µ = 37:
Over the 48 years from 1950 through 1997, the stock market has gone up in the month of January for 31 times; it has gone up for the whole year for 36 times, and it has gone up both for the year and in January for 29 times.
A random sample of 51 observations was selected from a normally distributed population. The sample mean was x = 88.6 , and the sample variance was s2 = 38.2.
Find a peer-reviewed article that provides an example of a study where the researchers utilized a one sample chi-square OR a two sample chi-square. Briefly describe the study and discuss its findings in your own words.
At the 0.01 significance level is it reasonable to conclude that the modifaction reduced the number of traffic accidents?
The standard deviation in cash bonuses is $15,618 and the standard deviation in annual pay is $28,077. The estimated slope of best fitting line relating x and y is?
What are the Chi-square results? What are the expected and the observed results that were found? Are they results of the Chi-Square significant? What do the results mean?
In which category is ANOVA properly classified?
An experimental surgical procedure is being studied as an alternative to the old method. Both methods are considered safe. Five surgeons perform the operation on two patients matched by age, sex, and other relevant factors
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
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