. Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided the survey times shown in the file named Fowle. Based upon past studies, the population standard deviation is assumed known with σ = 4 minutes. Is the premium rate justified?
(a). Formulate the null and alternative hypotheses for this application. (b). At α = 0.01, what is your conclusion? (c). What is your interpretation of the type II error for this problem? What is its impact on the firm? (d). What is the probability of making a Type II error when the actual mean time is 17 minutes? (e). Given α = 0.01, if the firm want to control the probability of making a type II error to be less than 0.05 when the actual mean time is more than 17 minutes, how large the sample size is needed?
Time |
17 |
11 |
12 |
23 |
20 |
23 |
15 |
16 |
23 |
22 |
18 |
23 |
25 |
14 |
12 |
12 |
20 |
18 |
12 |
19 |
11 |
11 |
20 |
21 |
11 |
18 |
14 |
13 |
13 |
19 |
16 |
10 |
22 |
18 |
23 |
We need at least 9 more requests to produce the answer.
1 / 10 have requested this problem solution
The more requests, the faster the answer.
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less.
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 13 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys from a particular dient provided the survey times shown in the file named Fowle. Based upon past studies, the population standard deviation is assumed known with 9 minutes. Is the premium rate justified for this...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. A sample of 35 surveys provided a mean time of 17 minutes. Based upon past studies, the population standard deviation is assumed known with σ=4. Is the premium rate justified? Compute the value of the test statistic. (Round to two...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 14 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H0:μ=14H0:μ=14 vs. Ha:μ>14Ha:μ>14 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company charges the customer the premium rate when they...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.2 minutes. Is the premium rate justified? Compute the value of the test statistic (to 2 decimals). What is...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.7 minutes. Is the premium rate justified? 20.3 13.7 16.2 18.1 14.3 17.3 14.6 17.4 18.5 10.2 15.1 16.6...
(4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 16 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H M = 16 vs. H :N > 16 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company...
#3 (4 points) Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 18 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are ?0:?=18 vs. ??:?>18 1. Identify the consequences of making a Type I error. A. The company does not charge the customer the premium rate when they should. B. The company charges the customer...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed in a mean time of 15 minutes or less. If a longer mean survey time is necessary, a premium rate is charged. Suppose a sample of 35 surveys produces the data in the Microsoft Excel Online file below. Use a known σ = 3.9 minutes. Is the premium rate justified? Open spreadsheet Formulate the null and alternative hypotheses for this application. H0:...
(4 points) Fowle Marketing Research, Inc., bases charges to a cient on the assumption that telephone surveys can be completed within an average time of 15 mminutes or less. If more time is required, a premium rate is charged The testable hypotheses in this situation are H0 : μ = 15 vs. 14: μ > 15 1. Identify the consequences of making a Type l eror A. The company charges the customer the premium rate when they should. B. The...
question 3 and 4 with work please cient on the assumpoon that phone surveys can be completed with The estate hypotheses in this station are 1 1.l .co n ces of making a Type I error 2 0 vs H an average time of 20 minutes or less > 20 more time is required a A The company changes the customer the premium rate when they should B. The company does not change the customer the premium when they should...