Question

The average age of licensed drivers in a county is μ = 42.6, σ = 12, and the distribution is approximately normal. A county police officer was interested in whether the average age of drivers receiving speeding tickets differed from the average age of the driving population. She obtained a sample of N = 16 drivers receiving speeding tickets. The average age for this sample was M = 34.4. Perform the steps 2-5 of the hypothesis testing necessary to determine whether this group differs from the population of drivers in the county.

Answer #1

Here as we defined the hypothesis for two tailed test

H_{0} :
= 42.6

H_{a} :
42.6

Here standard deviation = σ = 12

Sample size n = 16

standard error of sample mean = σ/sqrt(n) = 12/sqrt(16) = 3

Average age of sample = M = 34.4

Step 2 :

Define the confidence level = 0.05

Step 3 :

Critical region for the two tailed test and alpha = 0.05

Z_{critical} = 196

Step 4 :

Z = (34.4 - 42.6)/3 = -2.7333

Step 4

Here as Z > Z_{critical} so we will reject the null
hypothesis and we will conclude that this group differes from the
population of drivers in the county.

For each problem students will write out all steps of hypothesis
testing including populations, hypotheses, cutoff scores, and all
relevant calculations.
The average age for licensed drivers in a county is 42.6, with a
standard deviation of 12, and the distribution is approximately
normal. A county police officer was interested in whether the
average age of those receiving speeding tickets is less that the
average age of the population who has a license. She obtained a
sample of 16 drivers...

The
average age for livmcensed drivers in purple county is u=42.6 years
with a standard deviation of sigma sub xbar=12.The local police
want to know if drivers who received tickets on the day of the
concert differ in age from licensed drivers in Purple County .If
so,they would use that as evidence that the event should not be
held next year.Below are the ages of the six individuals who
received tickets on the day of the concert .
20,23,51,46,31,18
Please...

n = 36
H0: μ ≤ 20
= 24.6
Ha: μ > 20
σ = 12
1
Thirty six GGC students were sampled to determine their average
age. The GGC website indicates that the average age of students was
20 years old, and you decided to conduct an upper tail test because
you think the average age is higher. You collected the above
information. What is the p-value of your hypothesis test.
Question options:
0.5107
0.0214
0.0107
2.1
2
n...

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