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A company manager believes that a person's ability to be a leader is directly correlated to their zodiac sign. He never selects someone to chair a committee without first evaluating their zodiac sign. An irate employee sets out to prove her manager wrong. She claims that if zodiac sign truly makes a difference in leadership, then a random sample of 210 CEO's in our country would reveal a difference in zodiac sign distribution. She finds the following zodiac signs for her random sample of 210 CEO's:
BirthsSigns
25Aries
13Taurus
17Gemini
21Cancer
16Leo
18Virgo
15Libra
16Scorpio
20Sagittarius
11Capricorn
23Aquarius
15Pisces
Can she conclude that zodiac sign makes a difference in whether or not a person makes a good leader?
Enter the test statistic - round to 4 decimal places.
Test Statistic is =
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
Do the intervals for A and B overlap? What do you think this means about the comparative effectiveness of these medications?
You're interested in predicting success in business. You're a stats star! Why not go out and collect 15 different variables and combine.
What is the value of the population mean? What is the best estimate of this value? Explain why we need to use the t distribution. What assumption do you need to make?
Daily output of Marathon's Garyville, Lousiana, refinery is normally distributed with a mean of 232,000 barrels of crude oil per day with a standard deviation.
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Determine the mean and the standard deviation of the 150 sample means, then compare these with their theoretically expected values.
markov chain-random walk on a circlea a particle moves on 3 points situated on a circle. at each step it is equally
On average, how many donors must be checked to find someone with Type AB blood? What's the probability that there is a Type AB donor among the first 5 people.
Use the normal approximation to the binomial with a correction for continuity. Round your answer to at least three decimal places. Do not round any intermediat
Which of the two simple linear regression models is the preferred model, and why? Is the multiple regression model preferable to the preferred simple regression model, and why?
You have a hypothesis that two drugs have different effects on lowering anxiety. You would have anxiety scores for drug A and anxiety scores for drug B (all after 4 weeks of treatment) to run inferential analysis for after 4 weeks.
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