8 (14 pts). The percentage of customer satisfaction for a ho…
8 (14 pts). The percentage of customer satisfaction for a hotel was 73% last year. The manager wants to know whether there is any difference of customer satisfaction between this year and last year. A survey of 544 customers shows that 386 customers are satisfied. (a) What is the population? What is the sample? (b) At α = 0.05 level of significance, determine whether there is evidence that the percentage of customer satisfaction this year is different from 73%. (c) Identify the type of error for your conclusion. Find the probability of error and probability of confidence if it is type I error.
Read DetailsA patient is sent to your laboratory to have his lower extre…
A patient is sent to your laboratory to have his lower extremity bypass graft evaluated with duplex. While performing the examination you notice that the velocity at the proximal anastomosis is 80 cm/s. You continue the examination and obtain a pulse wave Doppler signal about 1cm distal to the proximal anastomosis and you get a velocity of 210 cm/s. What do these findings suggest?
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