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A state administered standardized reading exam is given to eighth grade students. The scores on this exam for all students statewide have a normal distribution with a mean of 503 and a standard deviation of 40. A local Junior High principal has decided to give an award to any student who scores in the top 5% of statewide scores. How high should a student score be to win this award? Give your answer to the nearest integer.
Explain in your own words how to recognize a situation where you needed to use a two-sample test. Give a unique example of a two sample test for proportion or mean. Make sure to detail why only a two sample test would suffice.
A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day.
Determine and interpret a 95% confidence interval for the mean amount of time Americans age 15 or older spend eating and drinking each day.
The Investment Research Institute reported in its Mutual Fund Fact Book that the number of mutual funds increased from 5725 in 1999 to 7977 in 2009. What is the geometric mean annual percent increase in the number of funds?
The proportion of adults in the sample, as her estimate of p, the proportion of adults in the pond population. Find using the normal approximation with the continuity correction.
Give a brief definition and an example of the following: a. Descriptive Statistics b. Inferential Statistics
Describe a Bernoulli experiment and give two examples. What is the connection between a Bernoulli experiment and a binomial distribution? Explain.
joint pmf p(X1,X2)=(X1+2X2)/18, (x1,x2)=(1,1),(1,2),(2,1),(2,2), zero elsewhere. Determine the conditional mean and variance of X2, given X1=x1, for x1=1 or 2. Also compute E(3X1-2X2).
How do I construct an example where I would be able to apply the concept of expected value to a problem (e.g. a financial investment problem would be a great way to demonstrate how various stocks in a portfolio produce a weighted average of the ov..
A mathematical placement test is given to all entering freshmen at a small college. A student who receives grades below 35 is denied admission to the regular mathematics course and placed in a remedial class.
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
The average buglary rate for a juisdiction has been 311 per year with a standard deviation of 50 what is the probability that next year the number of burglaries will be more than 350.
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