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A random sample of 200 freshman and 100 seniors at Ferris High School are asked whether they agree with a plan to excuse upper class students (juniors and seniors) a half hour early while keeping underclass students (freshmen and sophomores) in school for the last half hour. Of the students sampled, 160 freshmen opposed the plan and 20 seniors opposed the plan.
Is there a difference (5% level of significance) between the proportion of freshmen who oppose the plan and the proportion of seniors who oppose it? Do a complete test showing all the parts.
Information on a packet of seeds claims that the germination rate is 92%. The packet contains 160 seeds. We will treat the packet as a random sample of seeds. Find the standard error of the proportion. Show 4 decimal places in your answer.
Find probability of getting both of them are male republican
Estimate the mean fill amount of a certain bottle-filling machine to within 0.05 liter. Assume that the population standard deviation is 0.17 liters. How large of a sample is needed to estimate the mean with 95% confidence?
Multiple choice question from Probability - The probability that he either passes mathematics or fails chemistry
Pulsar also manufactures a series of 19-in color television sets. The quantity x of these sets demanded each week is related to the wholesale unit price p by the following function.
Find the rate at which the water is draining from the tank after 5 minutes, 12 minutes, and 20 minutes.
Evaluate the double integral over sigma of (F*n dS) in the following cases, Use Gauss' Theorem and/or symmetry whenever convenient.
A consumer's group checked the gasoline mileage (to the nearest mile per gallon) on 25 different cars. The following gives a summary of the findings:
What should the outside dimensions be of this center for the construction cost to be minimum as possible?
If we are conducting a hypothesis test of a single proportion to determine if the proportion of late arrivals has increased: What is the value of the calculated test statistic?
The bus driver said, "We have gone 33 miles so far. If we continue to travel at the same rate, how many more minutes until we arrive?"
Use a table of values to estimate the year in which federal funding for Hiv/Aids research reached $18.5billion.ails as possible.
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