a. Explain pearson's correlation coefficient based image. b. Explain each table based image. c. Explain cronbach's alpha for each variables based image.
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- ????The manufacturer of an MP3 player wanted to know whether a 10% reduction in price is enough to increase the sales of its product. To investigate, the owner randomly selected 8 outlets, and sold the MP3 player at its reduced price. Reported below is the number of units sold last month at the regular and reduced prices at the randomly selected outlets. Regular - 138, 127, 129, 114, 114, 126, 98 Reduced - 122, 135, 151, 133, 113, 129, 134, 133 At the 0.050 significance level, can the car manufacturer conclude that the price reduction resulted in an increase in sales? Hint: for the calculations, assume reduced price as the first sample. Compute the pooled estimate of the variance (round to 3 decimal places) Compute the test statistic (round to 2 decimal places) State your decision about the null hypothesis (Reject or Fail to reject)The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 3232 who smoke. Step 1 of 2 : Suppose a sample of 20172017 Americans over 3232 is drawn. Of these people, 665665 smoke. Using the data, estimate the proportion of Americans over 3232 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.
- In December 2001 the research firm GfK surveyed babyboomers (Americans born between 1946 and 1964)with $100,000 or more investable assets. GfK contacted1006 randomly selected baby boomers by cell phoneor landline. The vast majority, 71%, reported that theyhave provided support to their adult children in the formof helping them pay for college tuition or loans. GfKreported a margin of error of plus or minus 3%. Whatconfidence level were the pollsters using?Source: New York Times, May 5, 2012.A) 90% B) 95% C) 96%D) 98% E) 99%What is the MSregression for this problem? Please put the answer in bold.A manufacturer produces car seat belts. Due to recent customers complaint, samples of seat belts were taken for analysis. In a sample of 483 seat belts, it was found that 29 of them are defectives. 1. Estimate the percentage of defective seat-belts that the manufacturers have produced. (1 mark)
- Find the sinmple Intorest on Al18200 for 6% years at annamA machine produces parts that are either good (80%), slightly defective (10%), or obviously defective (10%). Produced parts get passed through an automatic inspection machine, which is able to detect any part that is obviously defective and discard it. What is the quality of the parts that make it through the inspection machine and get shipped?Fourty percent of all Americans drink bottled water more than once a week (Natural resources Defense Council, December 4, 2015). Suppose you have been hired by the Natural Resources Defence Council to investigate bottled water consumption in St. Paul. You plan to select a sample of St. Paulites to estimate the proportion who drink bottled water more than once a week. Assume the popluation proportion of St. Paulites who drink bottled water more than once a week is 0.4 , the same as the overall proportion of Americans who drink bottled water more than once a week. c. Suppose you select a sample of 210 St.Paulites. Show the sampling distribution of p (to 4 decimals). E(p)= Qp= d. Based upon a smaller sample of only 210 St. Paulites, what is the probability that the sample proportion will be within 0.7 of the population proportion (to 4 decimals). Probability = e. As measured by the increase in probability, how much do you gain in precision by taking the larger sample in parts (a) and…