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A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2. Does the sample show sufficient reason to conclude that the population standard deviation is not equal to 8 at the 0.05 level of significance? Use the p-value method.
Linda would like to maintain a 90% service level. what safety stock level do you recommend for BX-5?
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
If the sales are $150,000 per month, determine how much the company can expect to receive of this amount.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Perform a proper analysis. Describe your null and alternative hypothesis, report the p-value. What is your conclusion?
Please discuss an application of ANOVA that might be undertaken in a workplace. What are the 3 or more treatments? What is the response variable?
If the limits of the confidence interval of the difference between the means of two normally distributed populations were 3.5 and 5.5 at the 95% confidence level, then we can conclude that we are 95% certain that there is a significant difference ..
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best?
A random sample of 20 vice presidents of Fortune 500 firms is taken. The amount each vice president paid in federal taxes as a percentage of gross income is determined.
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
Use simple exponential smoothing with α = 0.33 to forecast battery sales for February through May. Assume that the forecast for January was for 22 set of tires.
Identify the point estimate of the average number of available hotel rooms in this lesson from each sample. Construct and Interpret a 95% confidence level for the true mean number of available hotel rooms, based on the point estimate of each sampl..
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