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Prevalence of Alzheimer's disease (Case per 100 population)
Age group males females65- 69 1.6 0.070-74 0.0 2.275-79 4.9 2.380-84 8.6 7.885 + 35.0 27.9
Suppose an unrelated 77-year old man, 76 - year old woman, and 82- year old woman are selected from a community.
What is the probability that all three of these individuals have Alzheimer's disease?
A survey of 1,233 visitors to Mumbai last year revealed that 110 visited a small cafe during their visit. Laura claims that 10% of tourists will include a visit to a cafe.
What would be a good example of a null and alternative hypotheses for a decision relevant in life? What Type I and Type II errors could occur with your decision-making process?
Calculate the difference in the average "clutter" between network and TV.
Develop the estimated regression equation that can be used to predict the closing price given the value of Period At the .05 level of significance, test for any positive autocorrelation in the date.
Calculate the average or the median of the average or medians of the samples and compare it with the average of the population.
A large internet retailer is studying the lead time (elapsed time between the time when the order is placed and the time it is filed). The table below gives the lead times (in days) for a random sample of recent orders.
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Would you use a one-tailed or two-tailed test? Explain your response.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Considering all of the day to day activities you are engaged in at work and in your personal lives, write a 200 (or more) word paper that describes at least three (3) different statistical usages that you see regularly.
A job placement director claims that the average starting salary for nurses is 24,000.A sample of 10 nurses' salaries has a mean of 23, 450 and a standard deviation of 400. Is there enough evidence to reject the director's claim at 0.05 level of s..
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