Among all of the topics covered in this course up through th…
Among all of the topics covered in this course up through the year 1870, what do you think are the three most important topics and why? This is a reasoning question, so be sure that your response to the prompt explains your reasoning (EXPLAIN WHY YOU BELIEVE THE TOPICS YOU’VE SELECTED ARE MOST IMPORTANT). *remember — at least 5 paragraphs are required to earn full credit and don’t forget accurate dates*
Read DetailsIn the population, the average IQ is 100 with a standard dev…
In the population, the average IQ is 100 with a standard deviation of 15. A team of scientists want to test a new medication to see if it has either a positive or negative effect on intelligence, or not effect at all. A sample of 30 participants who have taken the medication has a mean of 140. Did the medication affect intelligence? Perform a Hypothesis test to answer this question. Note: You do not need to answer here, rather, include your answer with your uploaded scratch paper.
Read DetailsA study of health care costs for coronary angioplasty versus…
A study of health care costs for coronary angioplasty versus coronary bypass surgery at a London hospital showed an average cost of 6,176 pounds with a standard deviation of 329 pounds for 231 angioplasties and an average cost of 8,164 pounds with a standard deviation of 264 pounds for 221 bypass surgeries. Is this sufficient evidence to say that the average cost of angioplasty is less than the average cost of bypass surgery?
Read DetailsAccording to Facebook’s self-reported statistics, the averag…
According to Facebook’s self-reported statistics, the average Facebook user is connected to 80 community pages, groups, and events. For a statistics project a student at Contra Costa College tests the hypothesis that CCC students will average less than 80 such connections. She posts a survey on her Facebook page. Her sample contains 45 responses. She chooses a 5% level of significance. From her data she calculates a t-test statistic of approximately -1.74 with a P-value of about 0.04. What can she conclude?
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