HW10 Skeleton

10.1

• 1. type answer here. hypothesis
• 2. type answer here. hypothesis testing
• 3. type answer here. null hypothesis
• 4. type answer here. alternative hypothesis
• 5. type answer here. 1
• 6. type answer here. 2
• 7. type answer here. level of significance
• 8. type answer here. false
• 9. type answer here. Note there is two parts to this question. right-tailed test, mean
• 10. type answer here. Note there is two parts to this question. left-tailed test, p
• 11. type answer here. Note there is two parts to this question. two-tailed test, standard deviation
       

18. 1. type answer here. H0: u = 32 ounces H1: u < 32 ounces

    2. type answer here. deciding that packages are less than 32 ounces when actually they are greater than 32 ounces.

    3. type answer here. deciding that packages are at least 32 ounces when actually they are less than 32 ounces.
19. 1. type answer here. H0: standard deviation = 0.7 psi H1: standard deviation < 0.7 psi
    2. type answer here. The quality-control manager rejects the hypothesis that the variability in the pressure required is 0.7 psi, when the true variability is 0.7 psi
    3. type answer here. The quality-control manager fails to reject that the variability in the pressure required is 0.7 psi when the variability is less than 0.7 psi.  
20. 1. type answer here. H0: u = 54 quarts H1: u > 54 quarts
    2. type answer here. Many Americans eat more than 54 quarts of popcorn annually
    3. type answer here. A type two error has been made and there is a .05 probability of making a type 1 error
21. 1. type answer here. H0: p = 0.028 H1: p > 0.028
    2. type answer here. There is not sufficent evidence to conclude the proportion of high school students exceeds 0.028 at this counselor’s high school.
    3. type answer here. A type 2 error was committed because the sample evidence led the counselor to conclude the proportion of e-cigs used at her school was 0.028 when the proportion was higher.