statistics 120 help. What is the probability of selecting a female if you choose
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statistics 120 help.
What is the probability of selecting a female if you choose one name at random from the data?
What is the probability of selecting a smoker if you choose one name at random from the data?
What is the probability of selecting a female smoker if you choose one name at random from the data?
What is the probability of selecting a female or a nonsmoker if you choose one name at random from the data?
If you selected 2 participants’ names at random without replacement, what is the probability of selecting 2 consecutive females who smoke?
What is the probability that the youth is female given that the youth randomly selected is a smoker?
If you selected a male youth’s name at random, what is the probability that this youth smokes?
Who is more likely to smoke according to this data set – a male or a female youth? Explain your answer in complete sentences.
Teen NOTICE No Smoking No Vapor Smoking No E-Cigarettes. Smoking Project Name: Chapter 5: Considering Probability In prior analysis, you calculated relative frequencies for several of the variables in this data set. In this section, you will learn that the probability of an event happening is approximately the relative frequency of the event happening over a number of trials of ane number of experiments increases, the approximation becomes more accurate overall. xperiment. As the In this analysis, you are going to determine the likelihood of smoking (i.e. the probability) based on an investigation of the intersection of sex and smoking status. To begin this process, complete the following Below record the frequencies for each of the categories in the following contingency table that combines the variables sex and status together, rather than separately as in previous analysis. Ser Total 65 589 654 Male Female Smoker fatusNonsmoker 310 279 Total 336 318 Now use this contingency table to approximate the following probabilities 1. What is the probability of selecting a female if you choose one name at random from the data?Explanation / Answer
1) P(selecting a female) = 318/654 = 0.486
2) P(selecting a smoker) = 65/654 = 0.099
3) P(selecting a female smoker) = 39/654 = 0.06
4) P(female or non smoker) = P(female) + P(non smoker) - P(female and nonsmoker)
= (318 + 589 - 279)/654 =0.96
5) P(selecting two consecutive female smoker) = 39C2/654C2 = 0.0035
6) P(female | smoker) = P(female and smoker)/P(smoker) = 39/65 = 0.6
7) P(smoke | male) = P(smoke and male)/P(male) = 26/336 = 0.077
P(selecting a male smoker) = 26/654 = 0.04
P(selecting a female smoker) = 39/654 = 0.06
As the probability is greater for female smoker, so female is more like to smoke.
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