Objective type problems based on interval estimate for the difference between two samples means.
1. While developing an interval estimate for the difference between two sample means with sample sizes of n_{1} and n_{2},
a. n_{1} must be equal to n_{2}
b. n_{1} must be larger than n_{2}
c. n_{1} and n_{2} can be of different sizes,
d. n_{1} must be smaller than n_{2}
2. Independent modest random samples are taken to test the difference between the means of two populations whose standard deviations are not known. The sample sizes are n_{1} = 25 and n_{2} = 35 and the correct distribution to use is the
a. t distribution with 58 degrees of freedom
b. Poisson distribution
c. t distribution with 60 degrees of freedom
d. t distribution with 59 degrees of freedom