Confidence interval for mean weight per white mouse
A study of 100 white mice showed that their average weight was 5.2 ounces. The standard deviation of population is 0.6 ounces. Which of the following is the 99% confidence interval for mean weight per white mouse?
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A radio manufacture claims that 65% of teenagers 13 to 16 years old have their own portable radios. A researcher wishes to test claim and chooses a random sample of 80 teenagers. She finds out that 57 have their own portable radios. At a=0.05, sho
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In 2009, the mean score of participants from Minnesota in SAT Critical Thinking test is 595 with variance of 11025. If a sample of sixty participants were to be taken from this group, what is the probability that the mean is:
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