Final

Question 1

What sampling method is applied when we separate a group of students by gender and then choose a few people from each group?

Answer 1

Stratified

Question 2

Related to data obtained from a sample:

Answer 2

Survey
Stratified

Question 3

The level of measurement used when recording the color of every car in a parking garage is:

Answer 3

Nominal

Question 4

The level of measurement used when taking sample temperatures of chicken soup is:

Answer 4

Interval

Question 5

The mean of the data points 66, 56, 72, 49, 82, 71, 60, 53 is:

Answer 5

Sum of all/8 = 63.625

Question 6

The median of the data points 66, 56, 72, 49, 82, 71, 60, 53 is:

Answer 6

60+66/2 = 63

Question 7

Estimate of true mean

Answer 7

x bar

Question 8

Given A and B are independent then P(A/B) is given by:

Answer 8

P(A)

Question 9

Given A and B are mutually exclusive then, A n B is

Answer 9

/0

Question 10

According to empirical rule states that approx what % of the observed data falls within three deviations of the mean:

Answer 10

99.7%

Question 11

According to empirical rule states that approx what % of the observed data falls within two deviations of the mean:

Answer 11

95%

Question 12

According to empirical rule states that approx what % of the observed data falls within one deviations of the mean:

Answer 12

68%

Question 13

Probability of accepting a false null hypothesis is considered:

Answer 13

Type II Error

Question 14

Rejecting a true null hypothesis is considered:

Answer 14

Type I Error

Question 15

Given that n(E) = 2 and n(S) = 9 what is the Odds (E’)?

Answer 15

7:2

Question 16

Given that n(E) = 2:3 wht is the P(E)?

Answer 16

2/5

Question 17

Suppose we perform a hypothesis testing at 4% level of significance. For which of he following p-values would we fail reject the numm hypothesis?

Answer 17

0.042