Convenience Simple random sample is the

The standard deviation is a number that measures how far data


Values are from their mean.
Remember that standard deviation


Describes numerically the expected deviation a data value has from the mean. In simple English, the standard deviation


Allows us to compare how “unusual” individual data is compared to the mean.

74.What is the variance for the following set of scores: 2, 2, 2, 2, 2.

Mean=2
Variance=0

75. R 2 is the notation for:

Coefficient of determination

76. In a linear regression equation, Y=a + bX, what is the b denote?

Slope of the line

77. In a linear regression equation, what does a slope of 2.5 indicate?

For every increase of 1 uniton axis ,there is a decrease of 2.5 units on axis

78. R is-

Correlation coefficient

79. In a linear regression equation, what does a slope of 2.5 indicate?

For every increase of 1 uniton axis ,there is a decrease of 2.5 units on a axis

80. The rental values (in dollars) of a sample of four available apartments close to the university are 470, 600, 580, 550. The standard deviation of the sample is

57.15

81. There are three children in a room, ages three, four, and five. If a four-year-old child enters the room, the

mean

82. The standard deviation of 16 measurements of people's weights (in pounds) is computed to be 5.4. The variance of these measurements is

83. A set of data has a median that is much larger than the mean. Which of the following statements is most consistent with this information?

29.16

84. Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The median salary for the employees working for the company will