Statistics and Probability Answers

A survey claims that 73% of Fiji households have at least one credit card. Find the probability

that in a random sample of 550 Fiji households, 375 to 385 have at least one credit card.

_______ is the procedure based on sample evidence and probability used to test statements regarding a characteristic of a population.

a. sampling

b. analyzing

c. hypothesis testing

d. collecting

The ______ is assumed to be true until we have evidence to the contrary

a. null hypothesis

b. alternative hypothesis

c. level of significance

d. type I error

We seek evidence that supports the statement of the

a. null hypothesis

b. alternative hypothesis

c. level of significance

d. Type I error

Determine if the following is a right, left or 2 tail test?

H_o:p = 4.2

H₁:p not equal to 4.2

a. right tail test

b. left tail test

c. 2 tail test

d. neither

Determine if the following is a right, left or 2 tail test?

H_o:p = 0.76

H₁:p > 0.76

a. right tail test

b. left tail test

c. 2 tail test

d. neither

If you reject the H_o when in reality the H_o is true, then you have made a

a. Type I error

b. Type II Error

c. A real big mess

d. the correct decision

When you fail to reject the H₀ when the H_a is true, then you made a

a. Type I Error

b. Type II Error

c. The correct decision

d. A real big mess

The ______ is never declared true.

a. null hypothesis

b. alternative hypothesis

c. level of significance

d. consequence

A Type I Error is like putting an _______ person in jail.

a. innocent

b. guilty