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Please complete the following:
A. Identify the population and the sample: A survey of 787 small-business managers found that 72% are optimistic about the future of their company.
b. Determine whether the numerical value describes a parameter or a statistic: 19% of a sample of Indiana 9th graders surveyed smoked cigarettes daily.
c. Determine whether the data are qualitative or quantitative and explain your answer: The zip codes of a sample of 350 residents of nursing homes.
d. Identify which sampling technique was used in the study and explain: Law enforcement officials use a radar gun to measure the speed of every tenth vehicle on an interstate.
1st a confidence interval is constructed without utilizing the finite population correction factor.
How many students should be surveyed to estimate the mean score within 25 points with 90% confidence?
If np ≥ 5 and nq ≥ 5, estimate P (more than 5) with n=14 and p=0.3 by using the normal distribution as an approximation to the binomial distribution; if np
To find out the proportion of the population of likely voters who agree the statement. Could we say among appropriate statistical certainty which the proportion of the population of likely voters.
How can you or your department decide whether or not the variation is important? How could using a mean difference test help?
How many samples would be needed to create a 99 percent confidence interval that is within 0.02 of true proportion of premium grade fuel-quality failures.
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
Flu cases this past season in the Oshkosh school system were about 15 per week. For the entire state, the weekly average is 16 and the standard deviation, 2.35.
If an overrun contract was bid at 12 million dollars, what does the least-squares line predict for the cost of overrun (as a percent of bid price)?
If you are told a population has a mean of 25 and a variance of 0, what must you conclude? a) Someone has made a mistake. b) There is only one element in the population.
Use technology to find the estimated minium required sample size. The minimum sample size required is ? Computer users round to the nearest whole number. What is a major obstacle to getting a good estimate of the population mean?
Based on the Correlation following are Multiple choices question. If the correlation coefficient among two variables is equal to zero, what can be said of the variables X and Y.
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