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At a local middle school, 60% of students are enrolled in choir or band. If a random sample of 5 students is taken, what is the probability that all 5 students are in choir or band?
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A survey reported that 80% of college students had access to a tablet. In a sample of 200 college students, find the probability that more than 170 had access to a tablet.
In a hypothesis test, we use a sample to gain insight on what is likely the outcome for the population. In your example, that is a probability of 1 out of 20 as there were 20 people in the class. A hypothesis test might ...
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Thirty-eight percent of consumers prefer to purchase electronics online. You randomly select 16 consumers. Find the probability that the number who prefer to purchase electronics online is at most 5.
Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 4%7%-2%40%0%10%-1% Stock Y 2%-5%7%4%6%11%-4% Consider a portfolio of 10% stock X and 90% stock Y. What is the (population) standard deviation of po ...
Homework - Conditional Probability & Bayesian Analysis 1) Questions: a. Consider rolling a 6 sided die 100 times to determine the number of times a "1" occurs: i. This is an example of what type of probability? ii. What ...
If the return on stock A in year 1 was 11 %, in year 2 was -10 %, in year 3 was -4 % and in year 4 was 2 %, what was the standard deviation of returns for stock A over this four year period? (Round your answer to 1 decim ...
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