Answer:
Step-by-step explanation:
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1 answer:
Answer:
x = 2
Step-by-step explanation:
First, let's write out our equation:
I want to isolate x on one side, so first, I'll add 4 to both sides to remove the -4 from next to 2x:
Notice that I combined like terms with the -4 and 4 (to get 0) and the 6 and 4 on the right side (to get 10). Next, I'll add 3x to both sides:
And then I'll add like terms:
Now, all we have to do is divide both sides by 5:
And there's our answer. Hopefully that's helpful! :)
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Answer:
Step-by-step explanation:
Let's put the data as below:
n1=15 x1=2.8 s1=1.6 and s1²=2.56
n2=19 x2=2.4 s2=1.7 and s2²=2.89
alpha= 0.05
To test the hypothesis:
H0= There is no sufficient evidence that low income household have fewer children
H1=There is sufficient evidence that low income household have fewer children
Assume that population variances are equal.
the t-static for two samples,
~t with min (n1-1,n2-1)df
The pooled variance estimate Sp equals:
Sp²=2.7456
Sp=1.65699
Degrees of freedom=n1+n2-2=32
Under null hypothesis:
The critical value ttab=2.0369 for alpha=0.05
So we reject our null hypothesis H0
So there is sufficient evidence that low income households have fewer children than high income households