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Age at onset of dementia was determined for a sample of adults between the ages of 60 and 75. For 15 subjects, M = 67.2 and s = 3.06. Use this information to answer the following: a. Based on the data you have and the normal curve tables, what percentage of people might start to show signs of dementia at or before age 62? b. If you consider the normal range of onset in this population to be +/-1 z-score from the mean, what two ages correspond to this? c. A neuropsychologist is interested only in studying the most deviant portion of this population: those individuals who fall within the top 10% and the bottom 10% of the distribution. She must determine the ages that mark these boundaries. What are these ages?
Use the following frequency distribution to determine the midpoint of the second class.
the distribution of the amount of money in savings accounts for university of miami students has an average of 1100
q1. a normally distributed population has a mean of 40 and a standard deviation of 12. what does the central limit
How much production capacity should the manufacturer reserve for the last day?
a survey from teenage research unlimited found that 30 of teenage consumers receive their spending money from part-time
Find the sample size for the 95% confidence interval used to estimate the population proportion.
A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 available hours.
There are three nursing positions to be filled at Lilly Hospital. Position one is the day nursing supervisor; position two is the night nursing supervisor; and position three is the nursing coordinator position.
How many variables are there in this study? What are the levels of any variables you identified and what hypothesis test would be used to analyze these data? Justify your answer.
Three dessert packages to choose from. In how many different ways could the couple select an appetizer package, a main course,and a dessert package?
Use the equation to predict the value of a home measuring 1500 sq. ft. which is at a distance of 0.75 mile from the centre of the town.
Calculate the 95% confidence interval for the population proportion of patients who are successfully treated. (c) Write a sentence that correctly interprets this interval.
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