etermine the null and alternative hypotheses based on the following: A. According to the Centers for Disease Control and Prevention, 19.6% of children aged 6 to 11 years are overweight. A school nurse thinks that the percentage of 6- to 11-year-olds who are overweight is different in her school district. B. The standard deviation in the pressure required to open a certain valve is known to be s = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased. C. For students who first enrolled in two year public institutions in a recent semester, the proportion who earned a bachelor’s degree within six years was 0.386. The president of a certain college believes that the proportion of students who enroll in her institution have a lower completion rate.
Determine the null and alternative hypotheses based on the following:
A. According to the Centers for Disease Control and Prevention, 19.6% of children aged 6 to 11 years are overweight. A school nurse thinks that the percentage of 6- to 11-year-olds who are overweight is different in her school district.
B. The standard deviation in the pressure required to open a certain valve is known to be s = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased.
C. For students who first enrolled in two year public institutions in a recent semester, the proportion who earned a bachelor’s degree within six years was 0.386. The president of a certain college believes that the proportion of students who enroll in her institution have a lower completion rate.
D. Historically, the time to order and deliver a pizza at Jimbo’s pizza was 48 minutes. Jim, the owner, implements a new system for ordering and delivering pizzas that he believes will reduce the time required to get a pizza to his customers.
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