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A local social service agency is asked to determine areas in the greatest need of social support. The neighbourhoods that are identified as being in need of assistance will qualify for the city's new employment assistance. The determination will be based on whether a neighbourhood's income is below the monthly mean household income of $1,365. The preferred level of significance for this analysis is alpha = .01
The first area examined is the Southside community. A random sample of 98 households produces a mean of $1,240 with a standard deviation of $580.
a. Does the Southside qualify for the employment assistance program?
b. Provide the city council with a recommended course of action based on this result.
State the null and alternative hypothesis. population standard deviation is $2500 and level of test is 0.05 what is the critical value?
the dividend yield on shareholders funds of australias top 120 companies for the week ended friday 10 july 2009 is
Their average age was 19.1 years with a standard deviation of 1.5 years. What is the 95% confidence interval for the population mean?
In the real world, a given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject the null hypothesis.
27% fall into both categories. What is the probability a randomly selected student commutes and does not participate in a student organization?
Prepare a report for the customer that presents the expected value in points of each throw of the darts, and then present a graphic representation.
A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5 ounces.
A standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be greater than 122.
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
Body mass index is measures at the ratio of weight in kilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI. 25 27 31 33 26 28 38 41 24 32 35 40.
How should he go about taking samples to gather data for testing the hypotheses?
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