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A company that manufactures fluorescent light bulbs claims that the bulbs will operate for 10,000 hours. However engineers, familiar with the production process, used to believe that, on average, the company's light bulbs last for less than 10,000 hours. To test this hypothesis, 50 light bulbs were randomly selected and their lifespans were recorded. The data resulted in a sample mean of 9875 hours. You are interested in whether there is sufficient evidence to conclude that the true mean lifespan of the company's light bulbs is less than 10,000 hours.
If the p-value for the test were 0.119, what would be the test statistic for the test?
a) -1.960
b) -1.180
c) -2.240
d) Not enough information to answer the question.
e) None of the above are correct.
There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met.
two distinct solid fuel propellants type a and type b are being considered for a space program activity. burning rates
Draw the probabilities out like an org. chart, then choose to buy from the airline that is least likely to go bankrupt in June. Your research will include getting the bankruptcy.
What are the boundary points of the feasible region? What is the profitability at each boundary point of the feasible region?
a. Using the 0.10 level of significance, is there evidence that the population mean is above $565?
A sensitive measuring device should not have a large variance in the errors of measurements it makes. A random sample of 41 measurement errors gives s2 = 102.
Find two values of the normal random variable with mean 88 and standard deviation 5 lying symmetrically on either side of the mean and covering an area.
Do men really spend more money on St. Patrick's Day as compared to women? A recent survey found that men spend an average of $43.87 while women spend.
Is it fair to ask for money from patients on the date of the service? Why or why not?
The company uses two cost driver rates for allocating manufacturing overhead costs to job orders: one on the basis of machine hours for allocating machining department overhead costs and the other on the basis of direct labor cost for allocating t..
How would I find the probability if the student passes the quiz by guessing exactly 35 out of the 50 questions correctly.
Calculate the probability of getting three tickets within a 12 month period for a driver who averages one speeding ticket every 18.6 months
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