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Q1) According to Information Almanac. 80% of adult smokers started smoking before turning 18 years of age. Assume 10 smokers, 18 years of age or older are arbitrarily chosen and number of smokers who started smoking before 18 is recorded.
i) Determine the probability P (1.23)
ii) Suppose the random variable X is normally distributed with mean =50 and standard deviation =7 calculate P(X )
Q2) A 2003 Study found that medical students mean number of hours worked in a week is 81.7. Assume number of hours worked per week by medical residents is approximately normally distributed, with standard deviation of 6.9 hours.
i) Determine the probability that randomly selected medical resident works more than 100 hours in a week.
ii) Find out the probability that randomly selected medical resident works less than 60 hours in a week.
In a large western university, 15% of the students are graduate students. If a random sample of 20 students is selected, what is the probability that the sample contains:
Test whether there is a difference in the mean of times men and women and determine the p-value.
The study does provide sufficient evidence to support the claim that less than 75% of college student spend less than $250 per semester on textbooks.
Find out the probability that: (a) The amount requested is between $65,000 or more?
The standard deviation of the time to complete the entire homework assignment
The null hypothesis is the alternative is Use the given sample data to find out the P-value for the hypothesis test. Provide an interpretation of the P-value.
Describe what do you mean by terms 'false positive" and " false negative".
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find t..
Determine the probability distribution associated with these data.
Is there evidence to suggest that the training course helps out sales people?
Give an ending for the below statement.Last week Tom had exams in Statistics and in English. He scored 10 points above the mean on both exams. From this information, you can conclude.
Can researcher conclude that humidity has significant effect on eating behaviour? Use two-tailed test with a = 0.05.
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