Reference no: EM132857469
The following is known about the weights of a sample of 31 people.Sx = 4870Sx2
a. Find SS = 808450
b. Find s2
c. Find s
d. Find mean
SPSS Question: A farmer would like to evaluate the effectiveness of his harvesting techniques by examining the crop yield in a few of his plots of land where he grows both strawberries and tomatoes. The data below contains a column for each fruit type (strawberries and tomatoes), and represents the number of pounds collected from those plots each month across a span of 12 months. The data set also contains a column for the average amount of rain (in inches) and days of sunlight per month.
Month Strawberries Tomato Rain Sun
Jan 3.00 21.00 6.00 21.00
Feb 2.00 24.00 4.00 25.00
Mar 5.00 20.00 10.00 21.00
Apr 2.00 27.00 4.00 28.00
May 1.00 17.00 2.00 18.00
June 2.00 18.00 4.00 19.00
July 4.00 27.00 8.00 28.00
Aug 4.00 21.00 8.00 22.00
Sept 2.00 21.00 4.00 22.00
Oct 3.00 18.00 5.00 19.00
Nov 1.00 10.00 2.00 11.00
Dec 6.00 10.00 12.00 18.00
Please answer the following questions based on this data set and include the appropriate tables and/or graphs where required.
Using SPSS, compute the mean and standard deviation of the pounds of tomatoes and strawberries grown for the whole year. Paste this data table here. Based on this data, which plot produced more fruit?
The farmer knows that in December he introduced a special plant fertilizer to both soils. He notices that his farm produced 6 pounds of strawberries and 10 pounds of tomatoes in December. He concludes that the fertilizer worked more for the tomatoes than the strawberries. Is this a correct conclusion? Explain in detail why or why not. (If it is correct, point out what aspects of this data set would lead you to agree with the farmer. If it is not correct, provide the adequate analysis and solution.)
The farmer would like to know whether or not there is a relationship between the amount of rainfall during the month and the crop yield it produces. Include a table and accompanying graph from SPSS that displays the statistic which describe the RELATIONSHIP between:
1. rainfall and strawberries produced
2. rainfall and tomatoes produced
3. sunlight and strawberries produced
4. sunlight and tomatoes produced
5. explain your results. Is it possible that these two crop types respond differentially to the environment?
a. Are there any factors which could be contributing to the amount of each type of fruit that is produced which the farmer has not yet considered?