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Marketing companies widely use surveys in order to monitor the opinions of the consumers. Last year, a survey was undertaken to ask consumer about who buys different warranties for electronic appliances. Of a sample of 1,000, 50% indicated that they would buy the warranty. This year, another survey of 900 consumers revealed that 40% will buy the warranty.
a) Test whether there is sufficient evidence to conclude that the popularity of warranties for electronic appliances has decreased. Use a 5% significance level and the critical value approach.
For this question, we should use H0: P1-P2 = 0 or P1-P2 <=0?
What is different between these two things?
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Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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