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An Electric Co. Operates a fleet of trucks that provide electrical service to the construction industry. Monthly mean maintenance cost has been $75 per truck. A random sample of 40 trucks provided a sample mean of $82.50 per month, with a sample deviation of $30. Managers want a test to determine whether the mean monthly maintence cost has increased.
A. Using a .05 level of significance, what is the rejection rule for this test?
B. What is your conclusion based on the sample mean of $82.50?
C. What is the p-value associated with the sample result? What is your conclusion based on the p-value?
D. The Sunbeam Corporation makes a wide variety of appliances for the home. One product is a digital blood pressure gauge. For obvious reasons, the blood pressure readings made by the monitor need to be accurate.
What type of probability distribution is presented? Find the probability that exactly 5 of his saplings will die in that first winter. Round to 4 decimal places. Find the probability that 5 or less of saplings will die in that first winter. Round to ..
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
Any analysis required to check the required conditions (note that if you find that you cannot meet the required conditions for the test you expected to do, you must use the appropriate non-parametric test)
The F test is used in Analysis of Variance (ANOVA). When would a researcher use an ANOVA? Explain (one paragraph in length).
Solve manually and then by mega stat. Indicate your decision rule, your hypotheses and your statistical and management conclusions."
Compute the Pearson correlation. Multiply each X value by 2 and compute the Pearson correlation for the modified scores.
What are the similarities and dissimilarities between a chi-square analysis and a correlation analysis? Suppose you conducted a study to see if there was an association between political party affiliation and whether or not someone voted.
Sprinkler Systems. A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperature is at least 135 degrees F.
Joan's nursery specializes in custom-designed landscaping for residential areas. the estimated labour cost associated with a particular landscaping proposal is based on the number of plantings of trees,shrubs and so on to be used for the project.
Determine the values of mean M and standard deviation s for original sample?
The Rio-River Railroad, headquartered in Santa Fe, New Mexico, is trying to devise a method for allocating fuel costs to individual railroad cars on a particular route between Denver and Santa Fe.
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