95% confidence intervals constructed: n = 418 Question 1: Yes, p = 0.1986; 0.160

Question

95% confidence intervals constructed:

n = 418

Question 1: Yes, p = 0.1986; 0.1603 to 0.2368

Question 2: Yes, p = 0.6268; 0.5804 to 0.6732

Question 3: Basic p = 0.3923; 0.3455 to 0.4392

                 Enhanced p = 0.6077; 0.5609 to 0.6545

n = 254

Question 4: Every day p = 0.1969; 0.1480 to 0.2457

Question 4: Most days p = 0.5669; 0.5060 to 0.6279

Question 4: Occasionally or never p = 0.2362; 0.1840 to 0.2885

n = 418

Question 5: Almost every day p = 0.0335; 0.0162 to 0.0507

Question 5: Several times a week p = 0.0837; 0.0572 to 0.1103

Question 5: Almost never (rarely) p = 0.7488; 0.7072 to 0.7904

Question 5: Never p = 0.1340; 0.1013 to 0.1666

Question 6: Toll-free phone number p = 0.5502; 0.5025 to 0.5979

Question 6: AMS website p = 0.2536; 0.2119 to 0.2953

Question 6: Direct mail p = 0.11; 0.08 to 0.14

Question 6: Good Tunes & More p = 0.0239; 0.0093 to 0.0386

Question 6: Other p = 0.0622; 0.0390 to 0.0854

Question 7: Yes p = 0.0957; 0.0675 to 0.1239

Question 9: Yes p = 0.8469; 0.8124 to 0.8814

Question 10: Yes p = 0.0909; 0.0633 to 0.1185

Question 8: Trial Weekly rate ($) Willing to Pay

Confidence Interval Estimate for the Mean

Data

Sample Standard Deviation

1.9667

Sample Mean

20.73

Sample Size

      40

Confidence Level

    95%

Intermediate Calculations

Standard Error of the Mean

0.3110

Degrees of Freedom

      39

t Value

2.0227

Interval Half Width

0.6290

Confidence Interval

Interval Lower Limit

20.10

Interval Upper Limit

21.35

1. What proportion of homes subscribe to telephone service from Ashland? Would you say this portion is small, medium, or large?

2. What proportion of homes subscribe to Internet service from Ashland? Would you say this portion is small, medium, or large?

3. What proportion of homes that are using Ashland’s Internet service have Basic cable service? What proportion have Enhanced cable television service?

Data

Sample Standard Deviation

1.9667

Sample Mean

20.73

Sample Size

      40

Confidence Level

    95%

Explanation / Answer

1. 0.1986. The proportion is samll. [The proportion is given as probability, check whether it lies in the 95% ci]

2. 0.6268. The proportion is medium. [the proportion that subscribe to internet service is between 0.5804 t 0.6732]

3. 0.3923 and 0.6077

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