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What is the purpose of having two t test? why not just be able to conduct a t test for either independent or matched?
find the value of z that would be used to test the difference between the proportions given the following. use g - h.
When investigating the distribution of a data set, which is more effective: a frequency distribution or a histogram? Why?
What are the Chi-square results? What are the expected and the observed results that were found? Are they results of the Chi-Square significant? What do the results mean?
owner of a store that sells cds wants to estimate the mean amount of time a customer remains in the store. a random
About 80% of young adult Internet users (age 18 to 29) in a certain locale use social networking sites. The sample proportion for this population would follow approximately a Normal distribution with what mean and standard deviation for a rand..
a pew research center poll used telephone interviews to ask american adults if parents are pushing their kids too hard
facebook email electronic commerce and collaborative sites for both work and leisure are a normal part of our everyday
Based on these data, determine the 95 percent confidence interval estimate for true population mean?
errors in a billing process often lead to customer dissatisfaction and ultimately hurt bottom-line profits. an article
in a sample of 1000 fourth grade students the average iq score was 122. the prevailing view is that iq is distributed
You are investigating the flight characteristics of different kinds of birds. You collect a sample of 33 European swallows (Hirundo rustica) and measure their air-speed velocity in a borrowed wind tunnel.
A member of Congress wants to determine her popularity in a certain part of the state. She indicates that the proportion of voters who will vote for her must be estimated within plus or minus 2 percent of the population proportion.
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