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Airline companies are interested in the consistency of the number of babies on each flight, so that they have adequate safety equipment. Suppose an airline conducts a survey. Over Thanksgiving weekend, it surveys six flights from Boston to Salt Lake City to determine the number of babies on the flights. It determines the amount of safety equipment needed by the result of that study.
a. Using complete sentences, list three things wrong with the way the survey was conducted.
b. Using complete sentences, list three ways that you would improve the survey if it were to be repeated.
Find the probability that in a given month a) there are exactly 9 days with 0.01 inch or more precipitation, b) there are at most 9 days.
Discuss using a 5dB exchange exchange rate versus a 3dB exchange rate in protecting workers hearing. Make a case for the use of either the 90dBA PEL and 5dB exchange rate or the 85dB REL and a 3dB exchange rate?
q1. what is the purpose of sampling?a. to verify that the population is approximately normally distributedb. to
At 5% level of significance, is there evidence of difference in mean life of bulbs made by the 2 kinds of machines. What is your conclusion?
What are some of the flaws in this observational analysis? How might it be better designed and Explain why this is a good method
A student earned grades of 92, 79, 93, and 74 on her four regular tests. She earned a grade of 79 on the final exam and 88 on her class projects. Find the range, variance, and standard deviation for each of the two samples, then compare the two set..
Compute 95 percent confidence interval for mean percentage share of billing volume from network television for population of all US advertising agencies.
Do the data indicate that the distribution of preferences for older adults is significantly different from the distribution for college students? Test with .05.
Negatively correlated and that the area of the home and the selling price are positively correlated? Use the .05 significance level. Report the p- value of the test.
Construct a payoff table for the president's R&D investment problem.
suppose probability samples of size n2 are selected from 1 2 3 4 with probabilities d1.4 d2.4 d3.1 and d4.1.
if the alpha level is increased from a .01 to a .05 what happens to the size of the critical region.a. it
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