Statistics Year 2

Question 1

What MUST you remember when calculating the binomial distribution using the normal distribution?

Answer 1

ADJUST for CONTINUITY CORRECTIONS

Question 2

What MUST you remember about inverse normal?

Answer 2

Only calculates less than

Question 3

What MUST you remember about binomial CD?

Answer 3

ONLY calculates less than or equal to … convert ALWAYS

Question 4

How do you calculate the % error?

Answer 4

(actual value) - (estimated value) / (actual value)

Question 5

How do calculate % change?

Answer 5

(new value) - (orginal value) / (original value)

Question 6

What do you do if your percentage error has a negative?

Answer 6

GIVE THE MODULUS … POSITIVE VALUE

Question 7

What do you do if your calculated p value is less than the significance value?

Answer 7

Reject H0 and accept H1

Question 8

What do you do if your calculated p value is greater than the significance value?

Answer 8

Accept H0 and reject H1

Question 9

What do you do if the observed value falls within the critical region?

Answer 9

Accept H1 and reject H0

Question 10

What do you do if the observed value doesn’t fall within the critical region?

Answer 10

Reject H1 and accept H0

Question 11

In a 2 tailed test, when using the p value method, how do you know whether to find the x bar value less than or greater than?

Answer 11

Depends if x bar value is greater than or less than that mean (u- mu)

• if less than, then lower tail so less than
• if greater than, then upper tail so greater than