Fill in the frequency table of the final digit of 18 randomly selected phone numbers. Digit Frequency

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Question:

Fill in the frequency table of the final digit of 18 randomly selected phone numbers.

Digit	Frequency
0
1
2
3
4
5
6
7
8
9

Using the sample mean of the final four digits (9704 would lead to a mean of 5), compute the mean of the sample means. (Round your answer to 2 decimal places.)

a) Mean of the sample means

A sample of 40 observations is selected from a normal population. The sample mean is 26, and the population standard deviation is 5. Conduct the following test of hypothesis using the .05 significance level.

H₀ : μ ≤ 25

H₁ : μ > 25

(a)

Is this a one- or two-tailed test?

	"Two-tailed"-the alternate hypothesis is different from direction.
	"One-tailed"-the alternate hypothesis is greater than direction.

(b)

What is the decision rule? (Round your answer to 2 decimal places.)

(Click to select)Do not rejectReject H₀,when z >

(c)

What is the value of the test statistic? (Round your answer to 2 decimal places.)

Value of the test statistic

(d)

What is your decision regarding H₀?

	Do not reject
	Reject

There is (Click to select)insufficientsufficient evidence to conclude that the population mean is greater than 25.

(e)

What is the p-value? (Round your answer to 4 decimal places.)

p-value

A recent study by the Greater Los Angeles Taxi Drivers Association showed that the mean fare charged for service from Hermosa Beach to Los Angeles International Airport is $23 and the standard deviation is $3.00. We select a sample of 22 fares.

What is the likelihood that the sample mean is between $22 and $24? Assume the population of fares is normally distributed. (Round z value to 2 decimal places and final answer to 4 decimal places.)

Probability