Lecture 7

Question 1

a chart that plots the distribution of a numeric variable’s values as a series of bars

Answer 1

HISTOGRAM

Question 2

display the observed values against normally distributed data (represented by the line).

Answer 2

Q-Q PROBABILITY PLOT

Question 3

states that “the sampling distribution of the sample means approaches a normal distribution as the sample size gets larger”

Answer 3

CENTRAL LIMIT THEOREM

Question 4

are used to compare the mean of one sample to a known standard (or theoretical/hypothetical) mean

Answer 4

ONE SAMPLE Z-TEST / ONE SAMPLE T-TEST

Question 5

Identify test and what case: If σ is known and n ≥ 30

Answer 5

CASE 1, Z-TEST

Question 6

Identify test and what case: If σ is unknown and n ≥ 30

Answer 6

CASE 2, Z-TEST

Question 7

Identify test and what case: If σ is known and n < 30

Answer 7

CASE 3, Z-TEST

Question 8

Identify test and what case: If σ is unknown and n < 30

Answer 8

CASE 4, T-TEST

Question 9

It is a nonparametric equivalent of tests
regarding a single population mean

Answer 9

ONE SAMPLE SIGN TEST

Question 10

What should be included in the proper presentation of results?

Answer 10

1. INDICATOR
2. MEAN
3. T-VALUE
4. P-VALUE
5. DECISION
6. REMARKS