A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were rejected at the final inspection and could not be sold. A new process is introduced that is intended to reduce the proportion of rejected screens. After the process has been in place for several months a random sample of 100 screens is selected and inspected. Of the 100 screens 6 are rejected. What are the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected? H0:p=0.12Ha:p<0.12H0:p=0.12Ha:p<0.12 A H0:p=0.12Ha:p>0.12H0:p=0.12Ha:p>0.12 B H0:p=0.06Ha:p<0.06H0:p=0.06Ha:p<0.06 C H0:pˆ=0.06Ha:pˆ>0.06H0:p^=0.06Ha:p^>0.06 D H0:pˆ=0.12Ha:pˆ<0.12
A manufacturer of cell phone screens is concerned because 12 percent of the screens manufactured using a previous process were rejected at the final inspection and could not be sold. A new process is introduced that is intended to reduce the proportion of rejected screens. After the process has been in place for several months a random sample of 100 screens is selected and inspected. Of the 100 screens 6 are rejected. What are the appropriate hypotheses to investigate whether the new process reduces the population proportion of screens that will be rejected?
-
H0:p=0.12Ha:p<0.12H0:p=0.12Ha:p<0.12
A -
H0:p=0.12Ha:p>0.12H0:p=0.12Ha:p>0.12
B -
H0:p=0.06Ha:p<0.06H0:p=0.06Ha:p<0.06
C -
H0:pˆ=0.06Ha:pˆ>0.06H0:p^=0.06Ha:p^>0.06
D -
H0:pˆ=0.12Ha:pˆ<0.12
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