Age range (yr) 20-29 30-39 40-49 50-59 60-69 70-79 80+ Midpoint x 24.5 34.5 44.5 54.5 64.5 74.5 84.5 Percent of nurses 5.8% 9.1% 19.7% 29.2% 25.2% 9.4% 1.6% c) Find the probability that a British nurse selected at random in 1851 would be 60 years of age or older. (Round your answer to three decimal places.)(d) Compute the expected age μ of a British nurse contemporary to Florence Nightingale. (Round your answer to two decimal places.) yr(e) Compute the standard deviation σ for ages of nurses shown in the distribution. (Round your answer to two decimal places.)
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
| Age |
20-29 | 30-39 | 40-49 | 50-59 | 60-69 | 70-79 | 80+ |
| Midpoint x | 24.5 | 34.5 | 44.5 | 54.5 | 64.5 | 74.5 | 84.5 |
| Percent of nurses | 5.8% | 9.1% | 19.7% | 29.2% | 25.2% | 9.4% | 1.6% |
c) Find the probability that a British nurse selected at random in 1851 would be 60 years of age or older. (Round your answer to three decimal places.)
(d) Compute the expected age μ of a British nurse contemporary to Florence Nightingale. (Round your answer to two decimal places.)
yr
(e) Compute the standard deviation σ for ages of nurses shown in the distribution. (Round your answer to two decimal places.)
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