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Qusetion: Despite his success in 1936, George Gallup failed miserably in trying to predict the winner of the 1948 U.S. presidential election. His organization, as well as two others, predicted that Thomas Dewey would beat incumbent Harry Truman. All three used what is called quota sampling. The interviewers were told to find a certain number, or quota, of each of several types of people. For example, they might have been told to interview six women under age 40, one of whom was African American and the other five of whom were Caucasian. Imagine that you are one of their interviewers, trying to follow these instructions. Whom would you ask? Now explain why you think these polls failed to predict the true winner and why quota sampling is not a good method.
What is the role of trade terms in global transportation? Briefly describe the four groups of Incoterms.
15 pieces are selected at random for inspection. What is the probability of exactly 4 defective pieces being found in the sample?
The gross profit of a business is the difference between what a retailer charges for what it sells (net sales) and the cost of the items sold. For ex- ample, in the first quarter of 2010
what is the importance of textular tabular semi-tabularand graphical method iin presenting statistical
Compute the odds ratio and its 95% confidence limit. Write in words what this odds ratio means and what this confidence limit implies.
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
A standard deviation of 2.5lb. What is the largest annual per capita consumption of ice cream that can be in the bottom 15%?
Determine the mean, median, and mode, determine the interquartile range and determine the variance and standard deviation - compute the mean and the median. What is the shape of the distribution? Decide with measure of central tendency works better..
The following statistics were calculated from pairs of observations where X represents the independent variable and Y represents the dependent variable.
The researcher would like to create another regression model and use data from people who are currently students - In simple Ordinary Least Squares regression, the fitted line must always go through a particular point, which is found from the x and ..
The superintendent of a large office complex, upon evaluating 30 of the units recently purchased and finding their mean power consumption to be 805 watts, claims that her shipment does not meet company specifica- tions. At the 0.05 level of signif..
Is the motor vehicle insurance advisor's claim valid? Formulate the null and alternative hypothesis and conduct a hypothesis test for a single proportion, using α = 0.05. Use the NORMSDIST function in Excel to compute the p-value of the test stati..
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