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The scores on a standardized mathematics test for 8th grade children in New York State form a normal distribution with a mean of u=70 and a standard deviation of o=10.
a. What proportion of the students in the state have scores less than x=75?
b. If samples of n=4 are selected from the population, what proportion of the samples will have means less than M=75?
c. If samples of n=25 are selected from the population, what proportion of the samples will have means less than M=75?
Write a program to simulate the queue size. Use this simulation to help formulate a conjecture containing conditions on µ and λ that will ensure that the queue will have times when it is empty.
A sample of 25 students enrolled in the university indicates that X (bar) = $315.4 and s = $43.20.
Acme plumbing supply just received a shipment of 5,000 stainless steel valves, but 50 regular steel valves were also sent. There is no way to tell the difference between the valves.
Consider two aligned, parallel, square planes (0.4 m × 0.4 m) spaced 0.8 m apart and maintained atT1 = 500 K and T2 =800 K. Calculate the net radiative heat transfer from surface 1 for the following special conditions:
She needs to report the fugacity of n-pentane at 192°C and 1.8 MPa in a mixture of 13.7 mol % n-pentane, 32.1 mol % n-butane, 21.5 mol % isobutane, and 32.7 mol % n-hexane, and the number needs to be as correct as possible. Calculate the value for ..
which of the following is an example of a parametric test?analysis of varianceone-sample t-testpearson correlationall
Percentage grades in a large chemistry class follow a normal distribution with mean 67 and standard deviation 8. (a) What proportion of students in the class receive a grade lower than 56.5?
A bin contains three components from supplier A, four from supplier B, and five from supplier C. If four of the components are randomly selected for testing, what is the probability that each supplier would have at least one component tested?
Identify at your place of work (or a previous place of work, or an organization with which you are affiliated). Identify a dependent variable and 3 independent variables
First, write down three social problems (e.g., drug abuse, gang membership, bullying, domestic violence, child abuse, etc) that we might attempt to predict using logistical regression.
suppose that a pharmaceutical company wants to claim that side effects will be experienced by fewer than 20 of the
Suppose that the reported figure is a sample estimate based on 80 randomly chosen homes in this city, and that the population standard deviation was known to be $55,000. Give an 80% confidence interval for the population mean home price.
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