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A random sample of 100 cards has a mean value of $2.55 and a standard deviation of .44. Constructa 95% confidence interval estimate of the mean value of the inventory. Suppose there was 2,500 cards in the inventory and how would the results be useful to the owner to estimate the total value of the inventory. What equation is best?
A researcher wishes to construct a 95% confidence interval for a population mean. She selects a simple random sample of size n=20 from the population.
Clearly identify the independent and dependent variables you would study. Determine whether a one-tail or two-tail test is most appropriate and explain why. Generate a testable null statistical hypothesis and an alternative statistical hypothesis.
Compute the 95% confidence interval on the population mean if a sample of 1000 is taken and the sample mean is found to be 15.95 and standard deviation is 4.2.
Using the Census data, the OH Registry of Motor Vehicles reveal the subsequent about the Autos owned by the 10 families residing in Smallville.
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighted on a very accurate scale. The results in grams were:
System data for a job shop revealed that the average time spent by a job in the shop was approximately n = 5 working days. Construct a statistical test using a level of significance of alpha = 0.05
Determine the relationships among data above? Analyze with charts/graphs/tables and a discussion.
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
A company produces two products that are processed on two assembly lines. Assembly line 1 has 100 available hours, and assembly line 2 has 42 available hours.
What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300.00?
Given this information we could use a Z test for two independent means and conclude that indeed the sales are different when the soup is a featured item.
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