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ECO 578 Part A Multiple Choice (1–16)

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Part A: Multiple Choice (1–16)

Using the following information to answer questions 1-8:

2 1 3 0 1 2 0 5 1 4

What is the mean?

a) 1.90 b) 2.11 c) 1.73 d) 1.66

What is the median?

a) 1.00 b) 1.50 c) 1.60 d) 1.90

What is the mode?

a) 0 b) 1 c) 2 d) 3

What is the range?

a) 1 b) 4 c) 5 d) 3

What is the variance?

a) 1.66 b) 2.77 c) 1.76 d) 3.11

What is the standard deviation?

a) 1.66 b) 2.77 c) 1.76 d) 3.11

What is the 1st quartile?

a) 0 b) 1 c) 2 d) 3

What is the 70th percentile?

a) 1 b) 1.5 c) 2 d) 2.5

Questions 9-16 refer to the following frequency distribution:

The following information represents the number of tons of grain stored at the 60 grain elevators of central Soya, Inc.

Class Frequency What is the relative frequency for the class 170-174?

a) 16 b) 36 c) 0.27 d) 0.60

What is the mean?

a) 170.25 b) 12 c) 172.75 d) 167

What is the median?

a) 169.5 b) 170 c) 172.63 d) 173.13

160-164 6

165-169 14

170-174 16

175-179 13

180-184 11

Total 60

What is the mode?

a) 16 b) 170 c) 172 d) 174

What is the variance?

a) 39.68 b) 12.33 c) 151.55 d) 149.02

What is the standard deviation?

a) 6.30 b) 3.51 c) 12.31 d) 12.21

What is the 1st quartile?

a) 168.21 b) 167.07 c) 167.57 d) 167.71

What is the 70th percentile?

a) 176.35 b) 176.85 c) 176.81 d) 177.31

Part B: True or False (17-30)

The random sample is the most important, because statistical theory applies to it alone.

In a frequency distribution, the class mark is the number of observations that fall within that class.

Original class interval frequencies can be obtained by multiplying the respective relative frequencies by the total number of observations.

The sum of the class frequencies is...

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