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A sample of n = 300 items has been randomly selected. Of these, 55 contain the attribute of interest. based on this information, compute a 90% confidence interval estimate for the proportion of items in the population that have this attribute.
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10. This pilot sample's proportion is 0.50. What sample size will be sure to achieve the desired results? How many additional observations must the decision maker obtain?
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
A description of how you believe statistics can enrich and represent the results of a study, and an explanation of how statistics can be used to misrepresent the results of a study.
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
Find the probability of an untrained dog performing as well as Maggie. Is it unusual for an untrained dog to do as well as Maggie?
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
Drawing the standard normal curve and indicating the area representing the probability and
A survey found that 85% of women in a given city enjoy shopping online. Suppose you randomly selected 6 women from the city and ask them whether or not they enjoy shopping online. Find the probability that exactly 4 say they enjoy shopping online.
What is the probability for the given frequency distribution?
mean is calculated for each sample, then the average distance between M and u would be:
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