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If z is drawn from the standard normal distribution, find the matching statements, using Excel. (Hint: P(z<0.5) means the probability that z is smaller than 0.5)) 1.P(z < 0.3) 2. P(1.4 < z < 1.9) 3.P(z > 1.5) 4. P(-1.5 < z < -0.2)
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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 ...
Complete parts (a) and (b) using the probability distribution below. The number of overtime hours worked in one week per employee Overtime hours 0 1 2 3 4 5 6 Probability 0.016 0.063 0.178 0.283 0.220 0.173 0.067 Find t ...
A student recieves the grades shown below, with an A worth 4 points, a B worth 3 points, a C worth 2 points, and a D worth 1 point. What is the students grade point average? A in 1 four - credit classes C in 1 three - cr ...
Consider the following difference equation and initial condition(s). In each case, verify that the expression given for an (i) is a solution of the equation (ii) satisfies the initial condition(s). (a) an = 2(1/3)n satis ...
What statistic was calculated to determine differences between the intervention and control groups for the lumbar and femur neck BMDs? Were the groups significantly different for BMDs?
An insurance company will pay Dave $220,000 (the market value of the house) should his house be destroyed by fire during the year. In return, Dave pays the insurance company $1280 that year (called the "premium") for tha ...
Donald is a college student who has $4125 in a savings that he earned from his summer job. He plans to leave the $4125 in a certificate of deposit(CD) with Goldman Sachs bank earning 2% for three years, but his banker ha ...
Suppose that the height (x), in inches of a 20 year old man is a normal random variable with a mean of 70 inches and standard deviation of 5.102 inches. What is the 97.5th percentile of all 20 year old men's heights?
Express Courier Service has found that the delivery time for packages is normally distributed with mean 14 hours and standard deviation 2 hours. a. What percent of the packages will be delivered in less than 18 hours? b. ...
A child care center wants to determine if there is a relationship between how long a child naps in minutes (20,21,22,23,24,etc.,etc) and incidents of aggression (1,2,3,4,etc.,etc). What type of statistical test should be ...
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