1. Average monthly temperatures in the city of Denton is an examplé oft: 32Auoo

Question

1. Average monthly temperatures in the city of Denton is an examplé oft: 32Auoo Ordinal level of measurement Interval level of measurement C. Nominal level of measurement D. Ratio level of measurement 2. Refer to the frequency distribution table below: What is the relative frequency of the $1800-$1899" class? Class S1500 -$1599 S1600 - $1699 $1700 -$1799 $1800- $1899 $1900-$1999 Frequency 5 A, 10% B, 20% C.2% D. 5% Use the following sample values to answer questions #3 through #6 : 2, 2, 4, 5, 6, 8 3. The sample mean is? A. 4.5 D. 8 4. The median is? A. 4.5 B. S c. 2 D.8 5The mode is? A. 4.5 D. 8 6. The sample variance is? (You may find the worksheet below useful A. 5.5 B. 6.333 C. 4.583 D. 2.345 Values Deviations Squared deviations

Explanation / Answer

#1.

B. Interval level of measurement because temperature can be negative

#2.

Total frequency = 25

Relative frequency = 5/25 = 0.2

i.e. 20%

#3.

Sample mean = sum of numbers / count = 4.5

#4.

Arranging given numbers in ascending order

2 2 4 5 6 8

Median = (4+5)/2 = 4.5

#5.

Mode = 2 (maximum occurance)

#6.

std. dev. = sqrt(27.5/6) = 2.1409

Values Deviations SD 2 -2.5 6.25 2 -2.5 6.25 4 -0.5 0.25 5 0.5 0.25 6 1.5 2.25 8 3.5 12.25 27.5

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