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How do Americans think about ads on websites? A survey of 1,000 adult Internet users found that 670 opposed ads on websites. Assume that the survey of 1,000 Internet users age 12-17 found that 510 opposed ads on websites. At 0.05 level of significance, is there evidence of difference between adult Internet users and Internet users age 12-17 in proportion who opposes ads? Solve manually and then by mega stat. Point to your decision rule, your hypotheses and statistical and management conclusions."
Informed Consent would be used in qualitative and quantitative research for data collection, and how each may impact it from a qualitative and quantitative standpoint
Search the Internet to find three applications of statistical concepts that you find interesting, that you encounter on a daily basis, or that you find in your profession.
Determine the probability distribution for X defined as number of defective items drawn (Hint: You have to determine P(X=0), P(X=1) and P(X=2).
He argues that the regression effect says people who perform very poorly in their previous job tend to perform well in their next job. Is this what the regression effect says? Explain.
A SRS of size 16 drawn from a Normally Distributed population has a mean of 30 and a standard deviation, s, of 5. With 95% confidence, what is the interval that captures the true mean of the population?
The annual returns, in percentages, on stocks A and B for three possible states of the economy are given in the table below.
If you are dealt 3 cards from a shuffled deck of 52 cards, find the probability that all 3 cards are queens. A fair coin is tossed 8 times in succession. Find the probability of getting at least 4 heads.
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
Describe each of the following methods of statistical inference in detail (Please try to use layman's terms).
The sample yielded a mean content of 19.88 ounces with a standard deviation of 0.35 ounces. At 95% confidence using the p-value approach, test the hypothesis.
If you are performing a hypothesis test using a z statistic in which you sampled 50 people and found an average SAT verbal score of 542 (assume we know the population mean to be 500 and the standard deviation to be 100)
The mean time between reoccurring events is exponentially distributed with a mean time between events of 15 minutes.
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