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A newspaper reported on the results of an opinion poll in which adults were asked what one thing they are most likely to do when they are home sick with a cold or the flu. In the? survey, 63?% said that they are most likely to sleep and 15?% said that they would watch television. Although the sample size was not? reported, typically opinion polls include approximately? 1,000 randomly selected respondents.
A. Assuming a sample size of? 1,000 for this? poll, construct a 95?% confidence interval for the true percentage of all adults who would choose to sleep when they are at home sick. The 95% confidence interval is: (round to the nearest hundreth)
B. If the true percentage of adults who would choose to sleep when they are at home sick is 74?%, would you be? surprised? Yes or no.
A box of Light bulbs contains six bulbs, two of the bulbs are defective, calculate the following probabilities. What is the probability of choosing a non-defective bulb and a defective bulb in 2 draws
Salary information for a random sample of male and female employees of a large company is shown below.
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
Suppose the null hypothesis was rejected at a significance level of 0.10. The power of the test was 0.81. What type of error could be made and what is the probability of making that error?
a simple random sample of 50 adults is obtained and each persons red blood cell count is measured. the sample mean is
Risk management consists of a series of steps that should be followed to reduce the consequences of disruptions. Briefly discuss these steps.
A vending machine is configured to accept only those quarters with weights between 5.550 g and 5.790 g. If 280 different quarters are inserted into the vending machine, what is the expected number of rejected quarters?
a man and his wife decide that they will keep having children until they have one of each sex. ignoring the possibility
Compute a standardized score to correspond to the reported percentage of 61%. Comment on whether or not you believe that people in the sample could all have been telling the truth, based on your result.
association we know association does not imply causation but what does this mean in your own words. provide and discuss
A random sample of 24 stocks in the industry reveals a sample average excess return of 0.12 and sample standard deviation of 0.2.- State the null and alternative hypotheses, and carry out the test at the α = 0.05 level of significance.
For this same sample of n = 45, find out the width of confidence interval around population mean? Illustrate all work.
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