It would be 15 because 2/3 of $12 is $8. she has enough money to buy 10 bags from the gift shop which means she has $120. at the pharmacy, $120 would buy her 15 bags.
The difference between 1/8 and 6/10 = 0.475 , does this help?
Answer:
The first one is none of the answers are correct and the second one is -1,-7
Step-by-step explanation:
Just plug in the x and y values
Answer:
-1.683
Step-by-step explanation:
Given :
Group 1 :
x1 = 667 ; n1 = 10 ; s1 = 20
Group 2 :
x2 = 679 ; n2 = 14 ; s2 = 15
The test statistic assuming equal variance :
x1 - x2 / √[Sp² * (1/n1 + 1/n2)]
sp² = [(n1 - 1)*s1² + (n2 - 1)*s2²] ÷ (n1 + n2 - 2)
Sp² = [(10 - 1)*20² + (14 - 1)*15²] = 296.59
Test statistic =
(667 - 679)/ √[296.59 * (1/10 + 1/14)]
-12 / 7.1304978
Test statistic = - 1.682
