OLD PAPERS CODE 395 SPRING 2014 INTERMEDIATE
Past or old paper for course code 395 semester spring 2014 which relate with Statistics – II for the students of B.com level. First , second, third questions of this paper is in soft form while the other question along with these question are in hard form.
Q01: Fill in the Blanks.
i) The limits µ ± 3σ include 99.73 percent area under the normal curve.
ii) In normal distribution, MD =≈ 415 σ.
iii) NON SAMPLING errors may arise due to faulty sampling frames, non-responses and processing of data.
iv) The standard error can be reduced by increasing the SAMPLE SIZE.
v) The width of a confidence interval DECREASES if the sample size is increased.
vi) The NUL hypothesis always contains some form of an equality sign.
vii) The correlation coefficient is independent of the change in origin and unit of measurement.
viii) The degree of linear relationship between the two variables is called CORRELATION.
ix) The graph of time series is called HISTOGRAM.
x) The secular trend is measured by a straight line when a time series has a UPWARD trend.
A) What is the importance of normal distribution? Write any five properties of normal distribution.
B) In normal distribution mean is 20 and standard deviation is 5, find the following:-
i) P(15 ≤ x ≤ 22) ii) P(x ≤ 18).
A) Explain the following terms:
i) Bias, ii) Standard Error, iii) Finite Population, iv) Infinite Population.
B) A population consists of four values 1, 5, 7 and 11. Take all possible samples. Compare the mean and S.D of it with the mean and standard deviation of the population.