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Use mfrow to set up the layout for a 3 by 4 array of plots. In the top 4 panels, show normal probability plots for 4 separate "random" samples of size 10, all from a normal distribution. In the middle 4 panels, display plots for samples of size 100. In the bottom 4 panels, display plots for samples of size 1000. Comment on how the appearance of the plots changes as the sample size changes.
Needs to be done in R. Show code.
Briefly describe: a statistical relation, time series, cross section, least squares, See, r, R-squared, t-value, multicollinearity and serial correlation.
A brand name has 60% recognition rate. if the owner of the brand wants to verify that rate by beginning with a small sample of 5 randomly selected consumers, find the probability that exactly 3 of the 5 consumers recognize the brand name. Also fin..
Find the p-value in and interpret its meaning and what other assumption is necessary - construct and interpret a 95% confidence interval estimate of the difference between the population
1. Calculate the area under the curve (to the 4th decimal) for the following examples:
What types of occurrences might result in an incorrect conclusion from hypothesis testing?
Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
An MBA graduate keeps interviewing for jobs, one by one, and will stop interviewing on receiving an offer. In each interview he has an independent probability.
A researcher asks the question "Is there a relationship between GRE total scores and GPAs in the master's programs in electrical engineering?"
Find the margin of error for the 95% confidence interval of the proportion of all male firefighters that correctly identify their weight. (Give answer to 4 decimal places.) Assume the participants were chosen by a simple random sample.
There are 15 juniors and 20 seniors in the Stat Club. The club is to send four representatives to the Joint Statistical Meetings. If the members of the club decide to send two junior and two seniors, how many different groupings are possible?
In 2004, the Internal Revenue Service received 312,226,042 individual tax returns. Of these, 12,757,005 reported an adjusted gross income of at least $100,000, and 240,128 reported at least $1 million.27 If you know that a randomly chosen return s..
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
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