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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?
a polling company reported that 14 of 2286 surveyed adults said that they play baseball. complete the followingwhat is
The FDA claims that the mean nicotine content exceeds 30.2 milligrams for this brand of cigarette and their stated reliability is 99%. Do you agree?
which of the following statements is true with respect to the t-distribution?a the t-distribution is symmetrical.b the
The events A and B are independent, mutually exclusive or both. If two events A and B are mutually exclusive (A B = ), then they cannot be independent if P(A) > 0 and P(B) > 0. Why?
the average cost per square foot for the office rental space in the central business district of petaling jaya is
What shape curve do you get when your data set has the mean, median, and mode all with the same value? Could the value of the sample mean and the value of the population mean ever be the same?
part b colonial broadcasting company 50 marksfor the part b of the final project you will be analysing a harvard
Compare the three designs on speed of completion, the builder randomly selects 10 homes that he built in the past based on each of the three designs.
Create the 95% confidence interval for portion of respondents who feel president is doing a good job. Based on the intervalin part(a), It is sensible to conclude that majority.
Define, describe and provide an example of the Komologrov-Smirnov distribution. Use MS-Excel (if possible) to solve this problem, also Show all your work in obtaining the answer.
a computer retail store has 15 personal computers in stock. a buyer wants to purchase 4 of them. unknown to either the
1.a noted psychic was tested for esp. the psychic was presented with 400 cards face down and asked to determine if each
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