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A manufacturing company is interested in predicting the number of defects that will be produced each hour on the assembly line. The managers believe that there is a relationship between the defect rate and the production rate per hour. The managers believe that they can use production rate to predict the number of defects. The following data were collected for 10 randomly selected hours. Defects Production Rate Per Hour 20 400 30 450 10 350 20 375 30 400 25 400 30 450 20 300 10 300 40 300 Given these sample data, the simple linear regression model for predicting the number of defects is approximately = 5.67 + 0.048x.
A consumer agency has retained an independet testing firm to examine a television manufacturer's claim that its 25-inch console lmodel consumes just 110 watts of electricity.
there are 7 seniors and 3 juniors in the statistics club and a team of 5 will be randomly selected to attend the joint
a publisher wants to estimate the mean length of time in minutes all adults spend reading newspapers. to determine this
a researcher is investigating the effectiveness of a new medication for lowering blood pressure for individuals with
the owner of a donut shop wishes to determine the best mix for her three products zingers crullers and eacuteclairs.
1.a pediatrician is interested in studying the effect of motrin on reducing temperature in young children. four
many teens have posted profiles on sites such as facebook and myspace. a sample survey asked random samples of teens
you run a landscaping company and need to know the average time it takes to plant anbspnbspnbsplarge tree for
for the following sample8 1 51 5a. find the mean and the standard deviation.b. now change the score of x8 to x18 and
While in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the p-value is?
a fair 4 sided die has the numbers 123 and 4 on its faces. the die is rolled 20 times. the random variable x represents
Students revealed and average cost of books of $370 per student. The Dean of Students believes that cost are greater this semester. What is the test value for this hypothesis?
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