Question

1. mean and variance of a Poisson probability distribution are always equal to each other. ( Correct or Wrong)

2, the value of mean population is compulsory to conduct a t test significance analysis ( Correct or Wrong)

3. the Binomial probability distribution only applicable when when p= 0.50 ( Correct or Wrong)

4. Z TEST can be used to access if a null hypothesis can be accepted or not for a case with 8 sample size ( Correct or Wrong)

5. increase the sample size N is one of the strategies to reduce sampling distribution error. ( Correct or Wrong)

Answer 1

1.

since we know that mean and variance of poisson distribution always equal to lambda so both will be equal always hence

CORRECT

2.

for testing of mean we can use Z test or t test Hence

WRONG

3.

since binomail distribution have two parameters "n" and Probability of success "p" that can take values from zero to 1 Hence

WRONG

4.

if population standard deviation know then we can use Z test with small size too hence

CORRECT

5.

sampling distribution error is inversly proportional to sample size hence

CORRECT