Hypothesis that more female use instagram
Test the hypothesis that more female's use instagram than male's. Samples of 500 female and 500 male's were chosen, and 430 females and 390 males used instagram in the past week. Use the 10% significance level
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Carnival is exploring the possibility of offering a ferry service between Hilo and Maui, provided there is enough demand. Carnival randomly interviewed 210 commuters from the two islands, and 146 of them indicated they would use the ferry service
Insurance for an appliance costs $30 and will pay $330 if the insured item breaks within 2 years. The insurance company estimates that 3% of the insured items will break within 2 years. Let X be the random variable that assigns to each outcome (it
IS there evidence to suggest the proportion of males who feel air travel is now safer is greater than the proportion of females? Complete this test specifically for proportions.
One strategy for increased SAT exam scores is to take the test, study on weak areas, then retake the test. Based on the data presented from 11 students, does it appear retaking the exam results in increased exam scores?
Calculate a 90% confidence interval for the true average hole diameters, and give the interpretation.
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The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability that between 175 and 200 homes are going to be
In a normal distribution what is the proportion of area between the z scores -2.09 and +.53
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A 26-year-old man with a history of depression has been taking fluoxetine 40 mg/day for 12 weeks with no response.
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