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Let's say we know the population standard deviation and we are asked to create a 95% confidence interval. Our sample size is 17. Which value most accurately represents the critical value of Z that you would use to plug in for your interval?
Statistics and Probability, Statistics
Confidence 1.The daily sales of Burger Baby restaurants follow the normal distribution with a standard deviation of $4000. a. A sample is taken of 50 restaurants and the average sales were $40,000/day. What is the 99% co ...
In a large university, 68% of students live in dormitories. A random sample of 14 students is selected. What is the probability that the sample contains more than five students who do not live in the dormitories?
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In the Health ABC Study, 522 subjects owned a pet and 1968 subjects did not. Among the pet owners, there were 297 women; 961 of the non-pet owners were women. Find the proportion of pet owners who were women. Do the same ...
An equally weighted portfolio consists of 41 assets which all have a standard deviation of 0.137. The average covariance between the assets is 0.118. What is the standard deviation of this portfolio expressed as a percen ...
Armstrong Faber produces a standard number-two pencil called Ultra-Lite. The demand for Ultra-Lite has been fairly stable over the past ten years. On average, Armstrong Faber has sold 457,000 pencils each year. Furthermo ...
Pete Pablo has $20000 to invest. He is very optimistic about the prospects of two companies, 919 Brands and Diaries.com. However, Pete has a very pessimistic view of one company, a financial institution known as Star Ban ...
Suppose that we take a random sample of 49 people from this segment of the population. What is the probability that the mean number of days of disability of this sample will be greater than 6 days?
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