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Question: Math SAT scores for students admitted to a university are bell-shaped with a mean of 520 and a standard deviation of 60.
a. Draw a picture of these SAT scores, indicating the cutoff points for the middle 68%, 95%, and 99.7% of the scores.
b. A student had a math SAT score of 490. Find the standardized score for this student and draw where her score would fall on your picture in part a.
Consider a large population of shoppers, each of whom spends a certain amount during his or her current shopping trip; the distribution of these amounts.
If the average income for workers in Canada (in 2010) is 32,200 CAD and the standard deviation is 47,000 CAD. What does this say about the distribution (of income)? Is it normally distributed? Why or why not? What conclusion can you make from this..
The p-value measures the probability of making a Type II error. D. The larger the p-value, the stronger the evidence against the null hypothesis. E. None of the above statements are true.
In a normal distribution of 1,000 aptitude test scores, with a mean of 60 and a standard deviation of 8, how many scores fall:
an industrial hygienist want to be able to estimate the level of carbon monoxide in a plant at the a 0.01 level.
Find a sample survey. Use the Internet or some printed material to find an example of a sample survey that interests you. Describe the population, how the sample was collected, and some of the conclusions.
an adiabatic heat exchanger is used to heat cold water at 8 deg c entering at a rate of 3kgs by hot air at 150 deg c
an index of two store items for 2007 based on 2004 is to be constructed. the information for the prices and quantities
Lance produces 20 more than 4 times what Jacob can produce in one day. If Lance's total production for the day is 360, how much does Jacob produce in one day
What standard deviation of the sample mean do you need such that 95% of all samples will have a mean within 0.05 hours of μ?
Raj's Razors Manufacturing Company has four production facilities. The table below gives the coordinates and number of weekly shipments for each plant.
Measurements were taken on the length of call (defined as the difference, in seconds, between the time the person answers the phone and the time he or she hangs up). Analyze the data and compare the three independent groups of callers.
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