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The human resources department of a large investment bank announced that the number of people it interviews monthly has a mean of 105, with a standard deviation of 17. The management of the bank suspects that the standard deviation exceeds 17. Suppose that the management wants to take a small sample of months and carry out a hypothesis test to see if its suspicions have support. State the null hypothesis and the alternative hypothesis that it would use for this test.
Develop a frequency table and a relative frequency table to summarize this information.
1. of 1906 people who came into a blood bank to give blood 300 people had high blood pressure. estimate the probability
What was the name of the pandemic which killed over 1% of the world's population in 1918?
an overseas shipment of 5 foreign automobiles contains 2 that have slight paint blemishes. if an agency receives 3 of
Determine percent of the garages take between 29 hours and 34 hours to erect? Determine percent of garages take 28.7 hours or less to erect?
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
a group of researchers studied the effect of global environmental change on grazing lands. their article reported the
Suppose we have randomly and independently sampled 25 women and asked each whether she has been a victim of domestic abuse at some point in her life. Find the probability that more than 22 of the women sampled have not been the victim of domestic ..
Describe three reasons why respondents may refuse to participate in a survey. For each reason, provide a suggestion for how to avoid these cases of nonresponse.
Explain why one would expect to find a positive correlation between the number of fire engines that respond to a fire and the amount of damage done in the fire. Does this mean that the damage would be less extensive if fewer fire engines were disp..
Using the original data, estimate the population standard deviation with 90% probability.
a biologist has found that 40 of all brown bears are infected with trichinosis. 10 brown bears are tested for
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