A cell phone company
1 answer:
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K, remember
(ab)/(cd)=(a/c)(b/d) or whatever
also
and
and
![x^ \frac{m}{n}= \sqrt[n]{x^m}](https://tex.z-dn.net/?f=x%5E%20%5Cfrac%7Bm%7D%7Bn%7D%3D%20%5Csqrt%5Bn%5D%7Bx%5Em%7D%20%20)
and
and
and
(a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)
so
=
=
=
=
=
=
(ab)/(cd)=(a/c)(b/d) or whatever
also
and
and
and
and
and
(a/b)/(c/d)=(a/b)(d/c)=(ad)/(bc)
so
Answer: The proportion of new car buyers that trade in their old car has statistically significantly decreased.
Step-by-step explanation:
Since we have given that
p = 48% = 0.48
n = 115
x = 46
So,
So, hypothesis would be
So, test value would be
At 10% level of significance, critical value would be
z= 1.28
Since 1.28 < 1.72
So, we will reject the null hypothesis.
Hence, the proportion of new car buyers that trade in their old car has statistically significantly decreased.