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A couple decides to save to buy a car in two years' time. They will invest a fixed sum into a two-year fixed deposit savings account that pays interest at 12% p.a. How much would they need to invest today to have R150 000 at the end of the two-year period if:
(a) interest is paid annually?
(b) interest is paid half-yearly?
(c) interest is paid monthly?
your chemistry professor last semester lost your final exam. he therefore used your total points earned prior to the
A sample of 30 students are tested (sample mean=58, standard error=3.2). Compute a 99 percent confidence interval based on this sample's data. How do these students compare to the national sample?
a loan officer at a bank rates applicants for credit. ratings are normally distributed. the mean is 240 and the
If the standard deviation of the amount spent on books is $8.42, find these probabilities for a randomly selected American. Put answer in percent form.
Construct a 99% confidence interval for the difference in the probabilities of getting a fracture for non-cola drinking and cola drinking kids.
How many more sheep should be included in the sample if we want to say with 98% confidence that the population mean weight of the Jacob sheep is within 2.0 lb of the sample mean?
1. Let U and X be random variables, where U is Uniformly distributed (0,1). Given U=u, X has an exponential distribution with parameter =1/u.
What is z-score and how do you find the area under standard normal distribution curve. Find the area under the normal distribution curve between z=0 and z=2.34.
Suppose X1, X2, and X3 are independent and N (0, 1)-distributed. Compute the moment generating function of Y = X1X2 + X1X3 + X2X3.
suppose a random sample of 100 u.s. companies taken in 2005 showed that 21 offered high-deductible health insurance
NOTE: Instead of asking the user to input the coefficients, create a 3x3 matrix containing the data with each row corresponding to a problem. Then use a loop to execute the problem 3 times, using the appropriate row each time.
The smallest defect in a computer chip will render the entire chip worthless. Therefore, tight quality control measures must be established to monitor the chips.
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