Answer:
The null and alternative hypotheses are:
Under the null hypothesis, the test statistic is:
Where:
is the sample mean
is the sample standard deviation
is the sample size
Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:
Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.
Answer:
1. 11
2. 1
3. Associative property of addition: Changing the grouping of addends does not change the sum. For example, ( 2 + 3 ) + 4 = 2 + ( 3 + 4 ) (2 + 3) + 4 = 2 + (3 + 4) (2+3)+4=2+(3+4)left parenthesis, 2, plus, 3, right parenthesis, plus, 4, equals, 2, plus, left parenthesis, 3, plus, 4, right parenthesis
4.According to the identity property of multiplication, the product of any number multiplied by 1 is the number itself. ... Therefore, 14 × 1= 14 illustrates the Multiplicative identity. According to the identity property of addition, the sum of any number added to 0 is the number itself.
Step-by-step explanation:
500ml ⇒ 80g
2500ml ⇒ x (g)
500x=80*2500 /500
x=80*5=400 (g)
<span>"Non nobis Domine, non nobis, sed Nomini tuo da gloriam."</span>
Regards M.Y.
A) -5(-1)+1
y=6
b) -5(0)+1
y=1
c)-5(1)+1
y=-4
d)-5(2)+1
y=-9