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Find all values ofx(if any) where the tangent line to the graph of the given equation is horizontal. HINT [The tangent line is horizontal when its slope is zero.] (If an answer does not exist, enter DNE. Enter your answers as a comma-separated list.) y= -7x2 - 8x
400 customers of the company and finds that 30 of them are actually not happy about the service. Set up the null and alternative hypotheses to test for the company's claim.
a scientist attempts to perform a difficult experiment. she is successful in about 80 of her attempts. she attempts the
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
What are the appropriate ABC groups of inventory items? If demand for an item is 3 units per day, and delivery lead-time is 15 days, what should we use for a simple re-order point?
Suppose that four families are surveyed and that each one reports whether its income exceeded the reported medium for that year. List the sample points.
How many more days should be included in the sample to be 95% sure the population mean μ is within $50 of the sample mean x?
What justi?es the inclusion of a disturbance or error term in regression analysis?
Calculated test statistic at the 5% level of significance and An airline claims that 65% of its flights depart on time.
Determine the probability that a single light bulb lasts over 120 hours. (d) Could you use the CLT to approximate the distribution of the total lifetime of these bulbs?
in rolling a die the probability of obtaining 2 3 or 4 in three statistically independent throws
question hallux abducto valgus call it havis a deformation of the big toe that often requires surgery. doctors used
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