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Answer to a problem based on statistical graphics.
A new assembly operation has just been started. The numbers of defects per chassis for the first 10 produced are:
Chassis #
Number of Defects
1
0
2
3
-4
5
6
7
8
9
10
4
Create a c-bar chart and determine if corrective action is needed.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
Fast Service Truck Lines uses the Ford Super Duty F-750 exclusively. Management made a study of the maintenance costs and determined the number of miles traveled during the year followed the normal distribution. The mean of the distribution was 60..
It has been evaluated that 30% of all farms are family-owned. In sample of 12 farms, determine the probability that exactly 3 farms are family owned?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
Does this result support original claim, or is population percentage considerably less than 45%. Use alpha=.05 for level of significance.
The sample mean of the number of spots on the 6000 rolls, should be about If this die is rolled 6000 times, the number of times we get a 2 or a 3 should be about
The results of a recent poll on the preference of shoppers regarding two products are shown below.
The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals:
At.05 significance level, can we conclude that larger proportion of the agents think the economy is expanding this month?
what is the required sample size is the error is to be less than 1/2 hour with a 95% level of confidence?
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
What is the probability that no more than two of the three are commercial successes?
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