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A researchers wish to estimate, with 95% confidence, the proportion of people who own a home computer. A previous study shows the 40% of those interviewed had a computer at home. The researcher wishes to be accurate within 2% of the true proportion. Find the minimum sample size necessary?
Scenario 2: If the standard deviation is to remain at 0.05 ounces, what mean does the filling machine need to have to achieve this goal.
Find the standard deviation for the number of people with the genetic mutation in such groups of 600.
Create the 95% confidence interval about mean value of y, number of days absent, given x = 95 degrees, and = 0.449x - 30.27
At the 0.05 level of significance, do the samples provide sufficient evidence to indicate that on the average, fewer consumers prefer a new product when the spokesperson is male?
The National Survey of Student Engagement (NSSE) surveys freshmen and seniors about their level of engagement in campus and classroom activities that enhance learning.
The area under the standard normal probability distribution is?b. the area under the standard normal probability distribution is? c. the area under the standard normal probability distribution is?
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Management is interested in determining whether their efficiency measures have actually reduced prices. Answer the following questions for a hypothesis test that could be used to test the claim of management.
A thorough examination reveals that there is nothing wrong with the filling machine. From a statistical standpoint, was there a type error made? If yes, which type? Explain.
What I need are relevant questions for a survey questionnaire that will be valid for testing each of 3 hypotheses. Include the variables tested.
If two students were selected at random, what is the probability that they would both read at less than 400 words per minute?
What are the primary differences between investments in corporate stock versus corporate bonds? Since bonds pay interest, does that imply the individuals risk exposure is less for investing in bonds rather than stock?
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