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1. Suppose that the probability of making an A on a particular exam is 0.1.
(a) If five students who took the exam are chosen at random, what is the probability that no more than one made an A?
(b) Suppose that one was unsure about the 0.1 probability given above and want to estimate the probability of making an A. If a random sample of 30 students resulted in six who made A, what would you estimate the probability of making an A to be?
2. Let Y "" UNIF(O, By ) and let X have an exponential distribution with param eter Bx, where the parameters B are chosen such that the means of the distri butions are 50.
(a) Find P( 30 X 70).
(b) Find P( 30 Y 70).
(c) Which distribution would you prefer as a model for exam grades? Why?
What is the hospital's cost of capital assuming that the hospital has the following capital structure on its Statement of Financial Position.
We often hear you can lie with statistics. This is one way of saying statistics can be easily mis-communicated. Find one example of how statistics are mis-communicated and explain why there was a mis-communication and what you would do to correct ..
What do you think is the ideal number of children for a family to have?" A Gallup Poll asked this question of 1016 randomly chosen adults. Almost half (49%) thought two children was ideal.
They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
when testing h0u gt u0 using confidence intervals if u is not contained in the confidence interval then we would a.
a study estimate the mean annual people income for people living in public housing in california. for a random sample
The 587th of the 731 trees in the preserve was selected as the first observation in the sample. What is the tree number of the second observation in the sample?
a company that manufacturers coffee for use in commercial machines monitors the caffeine content in its coffee. the
Before deciding, the decision maker considers listening to the weather forecast on the radio. Draw an influence diagram that takes into account the weather forecast.
Three unrelated people go for dinner to a Chinese restaurant which uses MSG in its food. Each person has a 10% probability of developing an adverse reaction to the MSG.
What is the probability of at least three hacker attempts during a month? What is the probability of a hacker attempt occurring every 15 days or less (assume a 30 day month).
data from previous years reveal that the distribution of the final exam scores in an introductory statistics class is
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