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A consumer products company surveys 30 shoppers at a mall and asks each one if he/she likes the packaging of a new soap product. The results of the survey are:
Yes: 10; No: 19; No opinion: 1.
(a) Use these data to estimate the proportion of shoppers who would like the package for the soap.
(b) Suppose the company gathered these data by talking to customers in one of their stores. What impact might this have on the results. Suggest a better way to gather the data.
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Jack is doing a project in educational psychology. Before the experiment, he rank-orderes all his participants according to achievement test scores.
A survey of 600 non-fatal accidents showed 259 involved the use of a cell phone. Construct a 99% confidence interval for the proportion of fatal accidents that involved the use of a cell phone?
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Nursing program gives a qualifying exam to students applying for admission. The grades on the exam have a mean score of 80 with a standard deviation of 6. Describe the distribution of grades.
question listed below is the net sales in million for home depot inc. and its subsidiaries from 1993 to 2004.yearnet
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