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Have been searching for the answers for these two questions for the past three days and cannot find them. Number 3 I answered but I want to check to see if I answered it correctly. Can anyone assist? Thank you in advance.
1. What is the most controllable method of increasing the precision (narrowing) of the confidence interval?
2. What percentage of times will the mean (population proportion) not be found within the confidence interval?
3. When you draw a sample from a normal distribution, what can you conclude about the sample distribution? Explain.
Find the area under the normal distribution curve to the right of z = -1.03.
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
The number of false alarms a building fire alarm system registers has a Poisson distribution with a mean of 6 false alarms per year. The variance of the number of false alarms is what?
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
A simple random sample of 100 of a certain popular model car in 2003 found that 20 had a certain minor defect in the brakes. A simple random sample of 400 of this model car in 2004 found that 50 had the minor defect in the brakes.
Assume that the standard deviation of college student IQ's is 10. A random sample of 100 students from a college showed an average IQ of 110. Compute a 95% confidence interval for the mean IQ of students attending this college.
What is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
Using decision tree analysis, decide whether Jay must proceed with his law suit against manufacturer.
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
According to a well-known newspaper journal, 58.3% of the 222,900 households in particular county get the Sunday edition of local newspaper. Assume that random samples of 200 households are selected.
Explain an organizational scenario where quantitative (ratio level of measurement) information is or could be used to make management decisions about creating, maintaining, or improving quality.
Determine the mean and the standard deviation of the sample.
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