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  3. 6. a survey of 25 grocery stores produced the foll

6. A survey of 25 grocery stores produced the following sample statistics: 1.) mean price for a...

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Statistics

6.

A survey of 25 grocery stores produced the following samplestatistics: 1.) mean price for a gallon of milk was $2.98, and 2.)a calculated standard error of $0.10. What is the 98% confidenceinterval to estimate the true cost of a gallon of milk?

Multiple Choice

  • $2.73 to $3.23

  • $2.85 to $3.11

  • $2.94 to $3.02

  • $2.95 to $3.01

7.

The z-score or z-value corresponding to a95.34% confidence interval is ______.

Multiple Choice

  • 1.96

  • 1.65

  • 1.99

  • 1.68

8. The level of significance is the probability of rejecting thenull hypothesis when it is actually true.

True or False

9. A test statistic is a value, determined from sampleinformation, used to decide whether to reject the nullhypothesis.

True or False

10. If the null hypothesis is µ ≥ 200, then a two-tailtest is being conducted.

True or False

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