Answer Happy

Parkinsonism is an affliction of the aged and is frequently caused by Parkinson's disease, Alzheimer's disease, or other illnesses. The results from a recent study on Parkinsonism were reported in "Prevalence of Parkinsonian Signs and Associated Mortality in a Community Population of Older People," New England Journal of Medicine. A sample of 467 people, all 65 years of age or older, was selected from East Boston, Massachusetts. Each person was clinically evaluated and various signs of Parkinsonism, if any, were noted. The following table is a frequency distribution for some of the signs of Parkinsonism. Signs of Parkinsonism Sign Reduced arm swing Prolonged turning Right leg rigidity Left leg rigidity Slow finger taps Shuffling gait Frequency 210 153 141 154 197 83 a. What level of measurement do the data possess? b. What percent of the sample suffered from left leg rigidity? Round your answer to two decimal places. c. Add up the frequencies. Why does the sum of the frequencies exceed the total sample size of 467? d. Suppose 30 people suffer from both left leg rigidity and right leg rigidity. How many people in the sample suffer from rigidity in at least one of their legs?