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A local school district wants to survey parents about their attitudes toward the elimination of the marching band program as a way to save money. The school district sampled 120 parents and found 74 supported the plan to cut the band program.
A. Find the standard error of the proportion
B. Find the 95% confidence interval for the population of the proportion
the weekly income of night cashiers at a major department store follows the normal probability distribution. the
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
how do you know when to use the minimization and maximization lp
Carry out t test and find out whether or not demand and unit price are related. Let a=.05. Carry out an F test and find out whether or not demand and unit price are related.
question 1 if an unbiased coin is flipped 3 times what is the probability of getting exactly two heads?question 2 what
a large university is interested in the outcome of a course standardization process. they have learned that 150
Ccarry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
suppose that the probability of a baseball player getting a hit in at bat is 0.2807. if the player has 38 at-bats
Assume that 5% of men and only .25% of women are colorblind. A colorblind person is chosen at random:
If the weekly average expenditure of all households is $53,000 but an expert argues that the weekly expenditure is more than $53,000, test his claim at a 5% level of significance and interpret your results.
Possible test scores could range from 0 to 500. Assume that the scores are normally distributed. Find the probability that a student had a score higher than 320.
Create a 95% confidence interval for true mean.
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