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stich3 [128]
2 years ago
15

The marketing manager for an automobile manufacturer is interested in determining the proportion of new compact-car owners who w

ould have purchased a GPS navigation system if it had been available for an additional cost of $300. The manager believes from previous information that the proportion is 0.30. Suppose that a survey of 200 new compact-car owners is selected and 79 indicate that they would have purchased the GPS navigation system. If you were to conduct a test to determine whether there is evidence that the proportion is different from 0.30, which test would you use
Mathematics
1 answer:
pshichka [43]2 years ago
4 0

Answer:

Two-tailed test.

Step-by-step explanation:

There are two types of tests:

One-tailed tests and two-tailed tests.

When we only test if the mean is less or more than a value, we have a one-tailed test.

When we test if the mean is different from a value, we have a two-tailed test.

If you were to conduct a test to determine whether there is evidence that the proportion is different from 0.30, which test would you use?

Test if it is different, so a two-tailed test.

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A random sample of 145 students is chosen from a population of 4,250 students. The mean IQ in the sample is 130, with a standard
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Approximately, the 90% confidence interval for the students' mean IQ score is between 129.045 - 130.956

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