A12 oz bottle of clean green dish soap is $1.09, while a 20 oz bottle cost $1.99. which is the better buy?

12 oz = $1.09.
$1.09 divided by 12 = 0.09083.
20 oz = $1.99
$1.99 divided by 20 = 0.0995

The better buy is the 12 oz bottle because you pay less for the same amount. Because the $1.09 bottle was divided by 12, and the $1.99 was divided by 20, you get the amount each bottle costs if they only contained 1 oz. The better buy is the 12 oz bottle.

Degree of freedom = 2

Expected frequency = 80%

Critical value, = 5.991

χ² statistic = 3.5

Step-by-step explanation:

Given the data :

Hong Kong New York Paris

Yes 86% 76% 78%

No 14% 24% 22%

The degree of freedom for the Chisquare statistic is given as :

(no of rows - 1) * (number of columns - 1)

Number of rows = 2

Number of columns = 3

. Degree of freedom = (2-1) * (3-1) = 1*2 = 2

Expected frequency = (Row total * column total) / grand total

The expected frequency of Hong Kong / Yes cell :

Row total = (86+76+78) = 240

Column total = (86+14) = 100

Grand total, N = (14+24+22)+240 = 300

Expected frequency = (240*100)/300 = 80%

The critical value :

At α - level = 0.05 ; df = 2

Critical value = 5.991

χ² = Σ(observed - Expected)² / Expected

The expected values :

80 80 80

20 20 20

Hence,

χ² = Σ(86-80)²/80 + (76-80)²/80 + (78-80)²/80 + (14-20)²/20 + (24-20)²/20 + (22-20)²/20

χ² statistic = 3.5