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1) Kindly explain to me the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented
2) How large would a population have to be for a sample to be appropriate (i.e., rather than measuring the whole population)
The goal at U.S. airports handling international flights is to clear these flights within 45 minutes. Let's interpret this to mean that 95 percent of the flights are cleared in 45 minutes
A soft drink machine outputs a mean of 24 ounces per cup. the machines output is normally distributed with a standard deviation of 2 ounces. what is the probability of filling a cup between 21 and 26 ounces.
Regression model results can be erroneous if multicollinearity is an issue. What causes multicollinearity? If the intercept is statistically significant, what does this tell you?
Consider different types of qualitative data collection and analysis methods and the ways in which they can support business decision making and strategies.
As sample size increases, the standard error of M _______________ .
Using the p- value approach, test the hypotheses at the 5% level of significance.
Suppose that we generate a random sample from a given dis- tribution. If it is desired that the probability that the sample mean will be within 2 standard deviations of the mean of the distribution is at least .99, how large should the sample size..
In the study of fingerprints, an important quantitative characteristic is the total ridge count for the 10 fingers of the individual.
Suppose that lifetimes of such mice are normally distributed with standard deviation of 6 months, determine the probability that given mouse will live?
Consider the situation where you have three game chips, each labeled with one of the numbers 5,6,& 7 in a hat:
You run a two tail t-test. The critical value for this test at the .05 level is a t of 7.82. What value must the obtained t-test statistic be in order to be considered significant at the .05 level?
The distribution of 9 ounce bags of a particular bag of potato chips is approximately Normal with a mean of 9.12 ounces and a standard deviation of 0.15 ounces.
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