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 :


It is a left tailed test at 0.05 significance.
Standard errors of p=
=
=
=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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Answer:
18,000 is the maximum and indicates highest profit
Step-by-step explanation:
sorry for leaving that second part out
Answer:
9
step by step explanation :
390
<em>Hope</em><em> this</em><em> helps</em><em> </em><em>:</em><em>)</em>
X=-.5, it’s less than 0, and concave up & increasing in this situation are the same.
Answer:
A) 9
Step-by-step explanation:
No. of hours required: 4×27 = 108
If 6 machines working:
108÷6 = 18 hours
27 - 18 = 9 hours fewer