BUSI 1013: Statistics For Business - Sum of Squares - Kobe’s Nursery Specializes in Custom-Designed Landscaping - Statistics Assignment Help

Assignment Task:

Kobe’s nursery specializes in custom-designed landscaping for residential areas. The estimated labor 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. For cost-estimating purposes, managers use 2 hours of labor time for the planting of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow:

With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours. 

• State the null and alternative hypotheses.  
• compute the sample mean.   
• compute the sample standard deviation.   
• what is the p-value? 

Question 2: 
The manager of Nita Lake Resort in Whistle, BC, stated that the mean guest bill for a weekend is $900 or less. A member of the hotel’s accounting staff noticed that the total charges for guest bills have been increasing in recent months. The accountant will use a sample of future weekend guest bills to test the manager’s claim. 

Which form of the hypotheses should be used to test the manager’s claim? Explain.
Ho: µ ≥ 900        Ho: µ ≤ 900        Ho: µ =900
Ha: µ<900        Ha: µ>900        Ha: µ ≠ 900
 
Question 3: 
Simon has just begun her new job as a Manager on the sales force of a very reputable company. In a sample of 40 sales calls it was found that she closed the contract for an average value of 120 dollars with a standard deviation of 20dollars. Test at 5% significance that the population means is at least 100 dollars against the alternative that it is less than 100 dollars. Company policy requires that new members of the sales force must exceed an average of $100 per contract during the trial employment period. 
 

• Formulate the hypotheses 
• Calculate the test statistics 
• Can we conclude that Simon has met this requirement at the significance level of 95%?

Question 4
The following results come from two independent random samples taken of two populations.

1. What is the point estimate of the difference between the two population means?
2. Provide a 90% confidence interval for the difference between the two population means.
3. Provide a 95% confidence interval for the difference between the two population means. 
4. What is the p-value?
5. What will be the hypothesis testing conclusion with x = = 0.5

The following data are from a completely randomized design.

1. Compute the sum of squares between treatments. 

2. Compute the mean square between treatment

3. Compute the sum of squares due to error. 

4. Compute the mean square due to error. 

5. Set up the ANOVA table for this problem. 

6. At the a = .05 level of significance, test whether the means for the three treatments are equal

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