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In the study of 10 graduate students from nurse education program, average age of group was 48.6 years and standard deviation was 4.1 years. Suppose the variable is normally distributed. Determine 95% confidence interval of the true mean age.
Statistics and Probability, Statistics
1. Choose all probability distributions which are theoretically related to normal probability distribution 2. The 68-95-99.7 rule states that in a normal distribution 3. For a normal distribution the a mean of 179 and st ...
The contents of a particular bottle of shampoo marked as 150 ml are found to be 153 ml at an average, with a standard deviation of 2.5 ml. What proportion of shampoo bottles contain less than the marked quantity? Assume ...
Let X be a continuous random variable. Suppose that we know that Pr(X 5), and how do you know? (Hint: X is not necessarily normally distributed, but you can still consider how much area is under the curve, no matter the ...
Ralph and Gina attend differed schools, but each have a GPA of 3.2 The GPA's at each score follow a normal distribution. Ralph's school has a mean GPA of 2.7 and a standard deviation of .25. Gina's school has a mean of 3 ...
A? BBB-rated corporate bond has a yield to maturity of 11.2%. A U.S. treasury security has a yield to maturity of 9.9%. These yields are quoted as APRs with semiannual compounding. Both bonds pay? semi-annual coupons at ...
The ACME Insurance Company has two types of customers, careful and reckless. A careful customer has an accident during the year with probability 0.01. A reckless customer has an accident during the year with probability ...
Forty-nine percent of US teens have heard of a fax machine. You randomly select 12 US teens. Find the probability that the number of these selected teens that have heard of a fax machine is exactly six (first answer list ...
Assume that the class consists of 45 percent freshmen, 20 percent sophomores, 20 percent juniors, and 15 percent seniors. Assume further that 50 percent of the freshmen, 50 percent of the sophomores, 25 percent of the ju ...
2 part question: Part 1: What do you think is the item that accounts for the most cost in any hospital's budget? Can you outline ways to keep this cost under control? Part 2: Do think it is more difficult for a manager t ...
The lifetime of a particular type of light bulb are approximately normally distributed with a mean of 1200 hours and a standard deviation of 140 hours. a) Find the probability that a randomly chosen bulb will burn longer ...
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