Statistics Store 1 Store 2 mean median Q1 Q3 Range SD Coefficient of Determination

Question

1.      The cost (in dollars) for a sample of 7 products were obtained for two stores as shown in the table below. Get all the statistics for both stores to complete the second table.

Product	Product cost in Store 1	Product cost in Store 2
1	23	25
2	45	47
3	67	69
4	12	17
5	78	67
6	99	89
7	45	50

Statistics	Store 1	Store 2
mean
median
Q1
Q3
Range
SD
Coefficient of Determination

Answer 1

Using a TI-84 Plus Calculator, you can check your hand-calculations to ensure you get the same result. However, there are some professors and stats text books that actually calculate the Q1 and Q3 differently - so, beware and check with how your class is handling the calculations.

Store 1: mean: 52.714

median: 45

Q1: 23

Q3: 78

Range: 87

Store 2: mean: 52

median: 50

Q1: 25

Q3: 69

Range: 72

R-squared: 0.988

Tbe coefficient of determination is R- squared (where R is the correlation coefficient): 0.988 So, the coefficient of determination gives the proportion of the variation in the dependent variable predicted by the independent variable.