Assume that 80% of all children who are exposed to chicken pox contract the disease. If 1225 children are exposed to chicken pox, the probability that more than 945 of them will contract the disease is approximately the area under the standard normal curve
A. to the right -2.46.
B. to the right of -2.50.
C. to the right -0.18.
D. to the left 2.46.
E. none of these
Answer: B
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?
A. Yes B. No
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A. Yes B. No
Complete the table and use it to calculate the indicated relative frequency. Round your answer to three decimal places if necessary.The following table displays the age, in years, and sex for the residents of a retirement home.Age (years)?60-69 70-79 Over 79Total Male3? 105? Female17?1?4? Total????What is the relative frequency for males?
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