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11.- Parkinson’s disease affects internally generated movements such as movements recalled from memory. Following is a stem-and-leaf diagram of the ages, in years, at which a sample of 14 patients experienced the onset of symptoms of Parkinson’s disease. How many of these 14 patients were:
a). under 45 years old at the onset of symptoms?
b). at least 65 years old at the onset of symptoms?
c). between 50 years old and 64 years old, inclusive, at the onset of symptoms?
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The stem and leaf plot is given. From the stem and leaf plot first let us find the data set. In the stem and leaf plot , stem part represent the digit at the tenth place and leaf part represent the digit at unit place.
For example.
3 (stem) | 0 9 (leaf)
The data set will be = {30,39}
Now, let us write the dataset from the above stem and leaf plot.
Dataset = {39,48,49,50,52,52,53,53,54,54,62,65,71,71}
a. From the data set we can see only one patient at the onset of symptoms who is under 45 years old.
So, Number of patients at the onset of symptoms = 1
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- 1. The percentage of 12- to 17-year-olds who reported talking at least once in the past year with their parents about the dangers of drug, tobacco, or alcohol is 60% nationally. A state youth council believes this proportion is higher in their state, where there has been an intense media campaign about this issue. A survey of randomly chosen students from across the state shows 1032 of 1642 students reporting they are having these conversations with their parents. Is there evidence that the percent of students using drugs, tobacco or alcohol in this state is above the national rate?arrow_forward13) In a clinical study of an allergy drug, 115 of the 260 subjects reported experiencing significant relief from their symptoms. From the data, a 90% C.I. for the percentage of all subjects reported experiencing significant relief from their symptoms is (,blank ), blank (round to the 3rd decimal place).arrow_forwardDo all the cards look correct? And the one that says " the spread of the data (range) is 20" which group does that one belong to?arrow_forward
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