# Question

Suppose the first row of 12 observations in Exercise 3.110 came from solder connections made at station 105 and the second row came from station 107. Use a pair of stem- and- leaf diagrams to determine whether you should suspect a difference in the soldering process at the two stations.

## Answer to relevant Questions

Two different lathes turn shafts to be used in electric motors. Measurements made of their diameters (in cm) are Construct two stem-and- leaf diagrams to see if you should suspect that the two lathes are turning out shafts ...The following are the number of highway accidents reported on 30 successive days in a certain county: Construct a frequency distribution of these data. Identify the class boundaries, the class marks, and the class interval. Construct cumulative percentage distributions from the frequency distributions of absences given in Exercise 3.122. In exercise Find the distribution function of the random variable X of Exercise 3.17 and use it to reevaluate part (b). The density function of the random variable X is given by Find P(X < 1/4 ) and P(X > 1/2).Post your question

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