Suppose that you randomly selected 22 adults. If 25% of the population smoke, a) Using the Range Rule of Thumb, what is the minimum number of usual smokers we can expect to get out of 22 adults? Note: Round all answers to two decimal places. b) Using the Range Rule of Thumb, what is the maximum number of usual smokers we can expect to get out of 22 adults? Note: Round all answers to two decimal places. c) Would it be unusual to randomly select 22 smokers and get 10 smokers? Explain! Yes, since 10 is not between the maximum and minimum usual values. No, since 10 is between the maximum and minimum usual values. d) If we randomly selected 22 adults and found 10 smokers in the group, what could we conclude? We can conclude that 25% of smokers is probably incorrect, and that the percentage of smokers is greater than 25%. We cannot conclude that the 25% of smokers is probably incorrect.
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.
Suppose that you randomly selected 22 adults. If 25% of the population smoke,
a) Using the
Note: Round all answers to two decimal places.
b) Using the Range Rule of Thumb, what is the maximum number of usual smokers we can expect to get out of 22 adults?
Note: Round all answers to two decimal places.
c) Would it be unusual to randomly select 22 smokers and get 10 smokers? Explain!
- Yes, since 10 is not between the maximum and minimum usual values.
- No, since 10 is between the maximum and minimum usual values.
d) If we randomly selected 22 adults and found 10 smokers in the group, what could we conclude?
- We can conclude that 25% of smokers is probably incorrect, and that the percentage of smokers is greater than 25%.
- We cannot conclude that the 25% of smokers is probably incorrect.
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