Answer:
Step-by-step explanation:
Given that sample size = n=45
mu = 64 and sigma =14
a) Sample mean will follow a normal distribution irrespective of the original distributions provided
i) samples are randomly drawn
ii) samples represent the population
iii) Sample size is sufficiently large
b) Here we have sample std dev= 
c) 
Answer:
<em>y = 13</em>
Step-by-step explanation:
y = 13
Answer:
7 and 12
Step-by-step explanation:
x - y = 5
y = (5+x)
x+ (5+x) = 19
2x +5 = 19
2x = 14
x = 7
19-7 = 12
12 +7 = 19
12-7 = 5
Answer:
50
Step-by-step explanation:
We can see that that is a perfect 90 degrees from the little square. If we know the sum is 90 and we have 40, 90 - 40 = 50
Answer:
20+12x=80
Step-by-step explanation:
she can buy 5 shirts
