Answer:
Sale tax rate = 7.5%
Step-by-step explanation:
The book cost $12.95
If you take 12.95 x 0.075 = 0.97125
Round the answerto the hundredth (0.97)
Add the tax, 12.95 + 0.97 = 13.92
Answer:
130° is the answer to it
Step-by-step explanation:
180-50=130
Answer:
44 units
Step-by-step explanation:
Since B is the mid-point of AC
AB=BC
or,4x+14=x+20
or, 4x-x=20-14
or 3x=6
or,x=6/3=2
AC=AB+BC
= 4x+14+x+20
= 4(2) + 14 +2 +20
= 8+14+22
=44 units
Yes it is true that commercial truck owners violate laws requiring front license plates at a higher rate than owners of passenger cars because null hypothesis is rejected.
Given among 2049 Connecticut passenger cars, 239 had only rear license plates. Among 334 Connecticut trucks, 45 had only rear license plates.
let
be the probability that commercial cars have rear license plates and
be the probability that connected trucks have rear license plates.
Cars Trucks Total
Total 2049 334 2383
x 239 45 284
p 0.1166 0.1347 0.1191
α=0.05
Hypothesis will be :
![H_{0}:p_{1} =p_{2}](https://tex.z-dn.net/?f=H_%7B0%7D%3Ap_%7B1%7D%20%3Dp_%7B2%7D)
![H_{1} :p_{1} < p_{2}](https://tex.z-dn.net/?f=H_%7B1%7D%20%3Ap_%7B1%7D%20%3C%20p_%7B2%7D)
It is a left tailed test at 0.05 significance.
Standard errors of p=![\sqrt{p(1-p)/n}](https://tex.z-dn.net/?f=%5Csqrt%7Bp%281-p%29%2Fn%7D)
=![\sqrt{(0.1191*0.8809)/2383}](https://tex.z-dn.net/?f=%5Csqrt%7B%280.1191%2A0.8809%29%2F2383%7D)
=
=0.0066
Test statistic Z=p difference/standard error
=(0.1166-0.1347)/0.0066
=-0.0181/0.0061
=-2.967
p value=0.001505<5%
Since p is less than 5% we reject null hypothesis.
We cannot calculate standard deviation so we cannot calculate confidence interval.
Hence there is statistical evidence at 5% significance level to support that commercial truck owners violate laws requiring front license plates at a higher rate than owners of passenger cars.
Learn more about z test at brainly.com/question/14453510
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