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Online magazines make it easy for reasers to link to an advertiser's website directly from an advertisement placed in the digital magazine. A recent survey indicated that 56% of online magazine readers have clicked on an advertisement and linked directly to the advertiser's website. The survey was based on the sample size of n=6403
a) Use the five step p-value approach to try to determine whether there is evidence that more than half of all reasers of online magazines have linked to an advertiser's website.
b) Suppose that the sample size was only n=100 and as before, 56% of the online magazine reasers indicated that they had clicked on the an advertisemenet to linke directly to the advertisers website. Use the 5 step p-value approach to determine whetherthere is evidence that more than half of all the reasers of online magazines have linked to an advertisers website.
c) Discuss the effecct that sample size has on hypothesis testing.
d) What do you think are your chances of rejecting any null hypothesis concerning a population proportion if a sample size of n=20 is used?
It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate.
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How to calculate expected difference between the samples means, and how does larger variability affect the size of the standard error for the sample mean difference?
For the past 20 years, the high temperature on April 15th has averaged (j = 62 degrees with a standard deviation of a = 8. Last year, the high temperature was 66 degrees.
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
question the calculations for a factorial experiment involving four levels of factor a three levels of factor b and
Find the probability that in a given month a) there are exactly 9 days with 0.01 inch or more precipitation, b) there are at most 9 days with 0.01 inch or more precipitation.
At your place of employment, 100 employees are randomly selected and asked the distance of their communte to work. From this group a mean of 15.2 is computed. Identify the following as either?
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best?
Use descriptive statistics to summarize the data from the two studies. What are your preliminary observations about the depression scores?
Find out a 95 percent confidence interval for population mean.
facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57.
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