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D Dax limited installed a new safety equipment in order to reduce the number of person hours lost as a result of industrial accident. In a test to of the effectiveness of the equipment, a random sample of 50 departments was chosen. The number of person- hours lost in the month prior to and the month after the installation of the safety equipment was recorded. The percentage change was calculated and recorded. Assume that the population standard deviation is 5 and sample mean is -1.2. Can we infer at the 10% significance level that the new safety equipment is effective?
You are required to
a. Formulate hypotheses
b. Decide the suitable test statistics and justify your selection.
c. Calculate the value of the relevant test statistics and identify the P value
d. Based on the test statistics in part (III), decide the decision criteria.
e. Make the final conclusion based on the analysis.
Tommy's allowance is $5.50 per week. How much is that using the least number of dollars and dimes
With the common stock selling at $37, what is the conversion value of the bond?
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What is the probability a randomly chosen CD is not perfect? If the disk is not perfect, what is the probability it cannot be used at all?
This chapter discusses a number of uses for RSM: (a) to improve product design, (b) to provide experience in scientific "investigation
In how many different ways can the researches select to patients to receive the trial drug from the total of 20?
The data below represents the number of passengers per flight for a random sample of 50 flights from Halifax to Toronto on a particular airline.
question 1aa statistics practitioner wants to test the following hypothesesho p.70h1 pgt .70a random sample of 100
F90 posted a question Sep 18, 2014 at 12:58pm ..
Seventy million pounds of trout are grown in the U.S. every year. Farm-raised trout contain an average of 32 grams of fat per pound, with a standard deviation of 7 grams of fat per pound.
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For the same kind of lottery as in Exercise 3, which of the following strategies can improve your chance of winning? If the method works, explain why. If not, explain why using appropriate statistics terms.
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