HW10 Skeleton

10.1

• 1. Hypothesis
• 2. Hypothesis testing
• 3. Null hypothesis
• 4. Alternative hypothesis
• 5. Type I error
• 6. Type II error
• 7. Level of significance
• 8. False
• 9. right-tailed; mew
• 10. left-tailed; p
• 11. two-tailed; sigma

 

18. 1. Null hypothesis: mew = 32 ounces Alternative hypothesis: mew < 32 ounces

    2. A Type I error is made when the consumer advocate rejects that the peanut butter jars are being filled to 32 ounces, when they are being filled to 32 ounces.

    3. A Type II error is made when the consumer advocate does not reject the peanut butter jars are being filled to 32 ounces, when the jars are being filled to less than 32 ounces.

19. 1. Null hypothesis: sigma = 0.7 psi Alternative hypothesis: sigma < 0.7 psi

    2. A Type I is made when the quality control manager rejects that the pressure variable is 0.7 psi when it is true.

    3. A Type II error is made when quality-control manager does not reject that the pressure variability is 0.7 psi when variability is less than 0.7 psi.

 

36. 1. Null Hypothesis: mew = 54 quarts Alternative hypothesis: mew > 54 quarts

    2. Buy popcorn for some good family fun.

    3. A Type II error has been made by the marketing department. The probability of making a Type I error is 95%.

37. 1. Null hypothesis: p = 0.028 Alternative hypothesis: p > 0.028

    2. There is not significant evidence to conclude that the percentage of high school students who smoke e-cigarettes is higher at the counselor’s high school.

    3. A Type II error occured because the councelor was lead to believe that the proportion of e-cigarette users at her school was 0.028 when it was 0.034.