Answer to Question #302257 in Statistics and Probability for annie

Question #302257

A laboratory supervisor in hospital is investigating number of reported on-the-job training accidents over a period of one month. Based on past records, she has derived the following probability distribution for x; where x is the number of reported accidents per month. Find the mean


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Expert's answer
2022-02-25T05:50:53-0500

Needlestick injuries reported (x)(x) : 0, 1, 2, 3, 4, 5

Frequency (f)(f) : 8, 10, 2, 5, 3, 7


mean=ixifiifimean=\dfrac{\sum _ix_if_i}{\sum _if_i}

=18+10+2+5+3+7(0(8)+1(10)+2(2)=\dfrac{1}{8+10+2+5+3+7}\big(0(8)+1(10)+2(2)


+3(5)+4(3)+5(7))=76352.17+3(5)+4(3)+5(7)\big)=\dfrac{76}{35}\approx2.17


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