Give the probability distribution and sketch the histogram.Five rats are inoculated against a disease. After an incubation period, the number contracting the disease is noted. The experiment is repeated 20 times, with the results shown in the table.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Translate the phrase into a mathematical expression and then find the result.Multiply $31 by 54
A. 31 ÷ 54; $1774 B. 31 ÷ 54; $1664 C. 31 ? 54; $1674 D. 31 ? 54; $1684
Mathematics
Find the sample standard deviation.15, 15, 15, 18, 21, 21, 21
A. 3 B. 7.7 C. 9.0 D. 2.8
Mathematics
Provide an appropriate response.The formula to find principal is "principal divided by (rate times time)."
A. True B. False
Mathematics
Graph the equation.y + 2 = 0
A. 
B. 
C. 
D. 
Mathematics