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A consultant conducts a pilot study to estimate a population standard deviation, then determines how large a simple random sample will be necessary to have a given level of confidence that the difference between and will be within the maximum error specified by her client.
The necessary sample size has been calculated as n = 100. If the client suddenly decides that the maximum error must be only one-fourth that originally specified, what sample size will now be necessary?
1. the distribution of actual weights of 8-oz chocolate bars produced by a certain machine is normal with mean 7.8
Interpret the p-value in the context of the problem. (Note: this is NOT asking for a conclusion. Think about the definition of the p-value to answer this question.)
Make a scatterplot and describe the association. (Remember: direction, form, and strength!)- Why would you not want to talk about the correlation between a planet s Position and Distance from the sun?
find the indicated probabilities using the geometric distribution or poisson distribution. then determine if the
find z value describeda find z such that 82 of the standard normal curve lies to the right of z.b find the z value such
What is the probability that between 30 and 40 of the delinquents will commit another crime?
The article "The Gap Between Wine Expert Ratings and Consumer Preferences" (Intl. J. of Wine Business Res., 2008: 335-351) studied differences between expert and consumer ratings by considering medal ratings for wines, which could be gold (G), sil..
Find the range, standard deviation, and variance for the scores.
George Washington became the first President of the United States of America when he took office on April 30, 1789. Some of the important jobs that the President is expected to perform are?
(a) Would the university be correct in thinking that $75,000 was a good approximation to the average salary level of all of its graduates? Explain the reasoning behind your answer. (b) If your answer to part (a) is no, can you think of any..
in order to increase revenue many video game publishers sell downloadable content dlc separately from the main game.
1. a researcher sends a questionnaire to 6000 individuals. she gets back 5000 responses. the percentage of women among
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