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In October 2000 the U.S. Department of Commerce reported the results of a large-scale survey on high school graduation. Researchers contacted more than 25,000 Americans aged 24 years to see if they had finished high school; 84.9% of the 12,460 males and 88.1% of the 12,678 females indicated that they had high school diplomas.
a) Are the assumptions and conditions necessary for inference satisfied? Explain.
b) Create a 95% confidence interval for the difference in graduation rates between males and females.
c) Interpret your confidence interval.
d) Does this provide strong evidence that girls are more likely than boys to complete high school? Explain.
Describe a political poll or survey. Analyze the number of people who participated in the sample compared to the number in the population and discuss how the results of the survey can be used to tell a story or support an idea of the sponsoring comp..
A drama fan has taped 9 episodes (on nine different videotapes)of a drama. however, he only has time to watch four episodes. suppose he selects four tapes at random. How many different ordered arrangements of episodes are possible?
Identify the fallacies of relevance and weak induction committed by the following arguments. If no fallacy is committed, write "no fallacy.
the manager of a department store wants to determine what proportion of people who enter the store use the stores
in the formula for sample variance based on a sample of size n why is the sum of squares divided by n-1?select onea.
The weight for a group of 18 month-0ld girls are normally distributed with a mean of 24.4 pounds and a standard deviation of 2.6 pounds. Use the table to find the percentage of 18 month-old girls who weigh more than 27.8 pounds.
1. suppose a realtor is interested in comparing the asking prices of homes in philadelphia and baltimore. a random
A new product is tested on a random sample of 90. A total of 63 say they will buy the new product. A point estimate of the population proportion who will buy the product is 63/90 or .7 (70%). What is the standard error of the proportion?
Construct and interpret the 95% confidence interval for the population mean. Was it necessary to make any assumptions about the shape of the population distribution? Explain.
If a group of 81 children is selected at random, what is the probability that the average time these children watch television is more than 3.5 hours a day?
Determine the point estimate, then construct the 95% confidence interval for = the average attitude toward Springdale Mall. What is the maximum likely error in the point estimate of the population mean?
Many variables influence the price of a company's common stock, including company-specific internal variables such as product quality and financial performance, and external market variables such as interest rates and stock market performance.
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