The current mean rate for producing 5 amp fuses at Monarch Electric Company is 2
ID: 3022417 • Letter: T
Question
The current mean rate for producing 5 amp fuses at Monarch Electric Company is 250 per hour. A new machine has been purchased and installed. A sample of 10 randomly selected hours from last week revealed the mean hourly production on the new machine was 256, with a sample standard deviation of 12 per hour. At a 0.05 significance level can Monarch conclude that there is a change in the hourly mean production rate?
a.
What is the population parameter to be tested?
the variance of the production rate
the production rate of 256 per hour
the current mean production rate
the new mean production rate
the proportion of defective parts
What are your hypotheses?
H0 : = 256 and Ha : 256
H0 : = 250 and Ha : 250
H0 : > 256 and Ha : 256
H0 : > 250 and Ha : 250
What is the value of the test statistic?
1.96
- 3.4
1.58
- 0.6
3.58
What is the estimated p-value of the test?
Between 0.005 and 0.01
Between 0.025 and 0.05
Between 0.01 and 0.025
Between 0.10 and 0.20
Between 0.05 and 0.10
What is your conclusion?
the old mean production rate changed
the new mean production rate can be still 250 per hour
there is an increase in the proportion of defective parts
there is an increase in the mean production rate
the new mean production rate differs from the old one
the variance of the production rate
the production rate of 256 per hour
the current mean production rate
the new mean production rate
the proportion of defective parts
Explanation / Answer
a.) The new mean production rate
b.) H0 : = 250 and Ha : 250
c.) t = (256 - 250)/(12/10)
= 1.58
Between 0.01 and 0.025
d.) the new mean production rate can be still 250 per hour
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