You are a science teacher in charge of a laboratory section. The second laborato
ID: 3230732 • Letter: Y
Question
You are a science teacher in charge of a laboratory section. The second laboratory exercise is difficult and past experience has told you that only 20% of the lab groups will successfully complete this exercise. There are eight lab groups in the class. What is the probability that no group in the class win successfully complete the lab exercise? To improve the yield of pork, pigs have been given Portland cement (an ingredient of concrete - true story!) supplemented feed (this supplement worked for beef!). The pigs chosen were pairs from 15 different litters One of each pair (from the same litter) was raised on a diet supplemented with cement and the other on the same diet without any supplement. The market weights of the pigs are given below (the bottom row is the difference between digs from the same litter fed control or cement-supplemented feed): This can be analyzed as paired data or unpaired data. You choose but you must tell me which you are using: I am analyzing this as _____ data. a. State the null & alternative hypotheses (directional or non-directional. you choose.) b. Calculate the appropriate test statistic and p-value. c. Draw a conclusion about the hypotheses (alpha = 0.05)Explanation / Answer
we ananlyse this as a paired data, since ,mean difference in the data is considered for the problem
a) Null hypo : There is no difference ebetween data , d= 0
ALternate hypo : There is significance difference data, d is not equal to 0
b) Test statistic
t = (d-0)/ s/sqrt(n)
t = 4.8 * sqrt(15) / 8.27
t = 2.2479
degrees of freedom = n-1 = 14
The P-Value is .041217.
The result is significant at p < .05.
c) We reject null hypothesis, since p < 0.05
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