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The results of a little survey that has been given to a number of statistics students are available in the little Survey data set. Make some conjectures about the responses and use R's graphical and numerical summaries to see if there is any (informal) evidence to support your conjectures. See ? Little Survey for details about the questions on the survey.
what is a 99 confidence interval on our estimate of mean if our sample of 40 observations with a sample standard
Comparing voltage readings. A Harris Corporation/University of Florida study was undertaken to determine whether a manufacturing process performed at a remote.
Suppose the probability that a randomly selected person who has a joint bank account with a spouse will close it within 10 years is 0.1.
A knew which of his fellow prisoners were to be set free, then his own probability of being executed would rise from 1/3 to ½ because he would then be one of two prisoners. What do you think of the jailer's reasoning?
the time between the arrival of electronic messages at your computer is exponentially distributed with a mean of two
A survey by Frank N. Magid Associates revealed that 3% of Americans are not connected to the Internet at home. Another researcher randomly selects 70 Americans.
How could your answer in question (a) change if you knew returns followed a skewed distribution instead of a normal distribution? Explain briefly.
the average score of all golfers for a particular course has a mean of 66 and a standard deviation of 5. suppose 100
nielsen media research provides two measures of the television viewing audience a television program rating which is
Compute the difference scores for following data from repeated-measures study.
City A has a population of 4 million, and city B has 6 million. Both cities have the same proportion of women.
Tests of a new light led to an estimated mean life of 1,321 hours and standard deviation of 106 hours. The manufacturer will advertise the lifetime of the bulb.
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