Business Statistics || Fall 2015 || Pokhara University

Very Short Answer Questions

Attempt all the questions.

Stem       Leaves

1             5  5  8  8

2             0  0  0  0  1  2  2  5  5  5  5  8  8  9

3             4  5  6  7  7

4             1  2

a)       What are the two pieces of information obtained from this stem and leaf display?

Find the value of k.

Descriptive Answer Questions

Attempt any six questions

6×10

Construct of giving and answer the following question.

a)       If 80 percent and above is the criteria to get distinction marks, then what percentage of the student applied at that college obtain distinction marks?

b)       If the director set up a benchmark to restrict those students who have obtained less than 55 percent in their plus two examinations referring class occupancy capacity. Then what percentage of the application will be disqualified for admission?

If one of the application is selected at random, find the probabilities that

i.            He has completed a master in engineering given that he is above 30 years old

ii.            He has done bachelor’s in engineering and he is lies between 25 to 30 years.

b)       Using the information listed below determine Index for Qualitative  (IQV) to find the ecological region-wise diversity for mountains, hills, and Tarai on the basis of the type of school attended by individuals currently in school by percentage.

i.            The wife is watching television in prime time

ii.            If the wife is watching television, the husband is also watching television.

b)       A survey conducted in 2011 found about 40% of the Nepalese workers who have been gone aboard are illegal If in a sample of 7 Nepalese workers who had gone abroad what is the   probability that

i.            Exactly 5 are illegal

ii.            At least 2 are legal.

a)       What is the probability of a student getting marks of more than 60?

b)       What percentage of students scored marks between 60 to 90?

c)       Only 5% of the students appearing in the exam score higher than which marks?

b)       Two types of drugs were used on 5 and 7 patients for reducing their weight Drugs A were imposed and drug B indigenous. The decrease in the weight after using the drugs for six months was as follows.

Is there a significant difference in the efficiency of the two drugs? It not which drug should you buy?

The manager has decided to give a bonus of Rs.5,10,15,20 and 25 to each worker in the respective output group of 40 or over weekly output.

i.            Find the average bonus received by the workers.

ii.            Find S.D, C.V.  bonus.

Comprehensive Answer Questions

Read the following case and answer the following question

a.        a.    Mini Case 1

Prior to 2048 economy of Nepal was based on Agricultural GDP. At that time from the Far, Western region farmers exported the Dairy product to India. Nepalese Ghee was highly demanded in major cities of India. Farmers of Kathmandu valley and its surrounding export red chilly and garlic to China. But after the establishment of democracy (after 2047) farmers started migrating from Nepal to the Middle East labor-market and other countries. This caused a heavy decrease in farming. As a result, the agricultural GDP started to fall vertically and non-agricultural GDP increased rapidly.  The following data represents the agricultural and non-agricultural scenario from 2031 to 2063 in Nepal. Do average contributions of Agricultural GDP is higher than Nonagricultural GDP before 2048 and agricultural GDP is lower than nonagricultural GDP after 2048 (including 2048)? Also, find standard deviation and interpret its meaning? Which of the following cluster shows the consistent growth rate if the consistent growth rate is required for a sustainable economy?

b.       Mini Case 2

Green Valley

The green valley assembly company assembles consumer electronic products. For manufacturing that needs temporary extra production capacity. As such, it has periodic product change, because the product green valley assembles is marketed under the label of well-known manufactures, high quality is a must.

Tom Bradley, of the green valley personal department, has been very impressed by recent research concerning job-enrichment programs. In particular, he has been impressed with the increase in quality that seems to be associated with these programs.

However, some studies have shown no significant increase in quality, and they imply that the money spent on such programs has not been worthwhile.

Tom has talked to John the production manager, about instituting a job-enrichment program in the assembly operation at the green valley. John was somewhat pessimistic about the potential, but he agreed to introduce the program. The plan was to implement the program in one wing of the plant and continue with the current method in another wing. The procedure was to be in effect for six months after that period, a test would be made to determine the effectiveness of the job-enrichment program.

After the six month trial period, a random sample of employees from each wing produced the following output measures:

Both John and Tom wonder whether the job-enrichment program has affected production output. They would like to use these sample results to determine whether the average output has changed and to determine whether the employees’ consistency has been affected by the new program. Based on the above information set the null and alternate hypothesis and test whether the Job-Enrichment program is effective or not use the p-value approach at 3% level of significance.