The standard deviation in the pressure required to open a certain valve is known to be o= 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased. (a) State the null and alternative hypotheses in words. (b) State the null and alternative hypotheses symbolically. (c) Explain what it would mean to make a Type I error. (d) Explain what it would mean to make a Type Il error.

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The standard deviation in the pressure required to open a certain valve is known to be o = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased.
(a) State the null and alternative hypotheses in words.
(b) State the null and alternative hypotheses symbolically.
(c) Explain what it would mean to make a Type I error.
(d) Explain what it would mean to make a Type Il error.
.....
(c) What would it mean to make a Type I error?
The manager
the hypothesis that the pressure variability is
psi, when the true pressure variability is
psi.
(Type integers or decimals. Do not round.)
Transcribed Image Text:The standard deviation in the pressure required to open a certain valve is known to be o = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased. (a) State the null and alternative hypotheses in words. (b) State the null and alternative hypotheses symbolically. (c) Explain what it would mean to make a Type I error. (d) Explain what it would mean to make a Type Il error. ..... (c) What would it mean to make a Type I error? The manager the hypothesis that the pressure variability is psi, when the true pressure variability is psi. (Type integers or decimals. Do not round.)
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