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A researcher wishes to estimate with 99% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 2% of the true proportion.
a) ind the minimum sample size needed, using a prior study that ound that 36% of the respondents said they have high-speed Internet access.
What is the minimum sample size needed using a prior study that found that 36% o the respondents said they have high-speed internet access?
N=______ Round up to the nearest whole number as needed.
b) What is the minimum sample size needed assuming that no preliminary estimate is available?
Determine mean of distribution shown. Give the mean of following probability distribution?
From the following information for Alfred Industries compute the overhead spending variance and the volume variance:
The president of the wholesale distributor is concerned about the possibility of stockouts causing a loss of customer confidence and loyalty and is interested in maintaining safety stock in inventory to prevent potential stockouts.
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Calculate the MEAN and STANDARD DEVIATION for the distribution below:
Determine the probability that particular call lasted between 110 and 180 seconds?
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
Formulate a suitable null and alternative hypothesis to test the students' claim that they followed their instructor's recommendation at a 5% level of significance and interpret your findings.
When is it important to have matched pairs rather than two independent sets of data?
Now we would like to evaluate regression equation for X using Y as independent variable.
A social psychologist reports that "in our sample, ethnocentrism was significantly higher (P
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