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According to the American Community Survey, 27% of residents of the United States 25 years old or older had earned a bachelor degree. Suppose you select 12 residents of the United States 25 years old or older and recorded the number who had earned a bachelor degree. Round probabilities to 4 decimal places.
1. Explain why this is a binomial experiment.
2. Find and interpret the probability that exactly 5 of them had a bachelor degree.
3. Find and interpret the probability that fewer than 5 of them had a bachelor degree.
4. Find and interpret the probability that at least 5 of them had a bachelor degree.
5. Compute the mean and standard deviation of the binomial random variable.
One of the histograms is a histogram of a sample (from a population with a skewed distribution) one is the distribution of many means.
You have helped me with some statistic questions a few days ago. Do you think you would have time to help me with some statistic questions today?
Employ a four period moving average and determine the forecasted demand for August. Put your answer in the form xx.x with no additional numbers or symbols.
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a single die is rolled 3 times. determine the probability of getting all
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(a) What is the average number of customers in the shop? (b) What is the proportion of potential customers that enter the shop? (c) If the barber could work twice as fast, how much more business would he do?
What do the data appear to show? Check the conditions for one-way ANOVA. Which requirements are a bit dubious in this setting?
1. What is the range of values for probability? 2. What do we mean by independent trials?
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