Mathematics, 12.03.2021 20:40 cutegirl0987
State whether the following statement is true or false, and explain why. If the statement is false, state the true change. If the profits in your consulting business increase by 6% one year and decrease by 4% the following year, your profits are up by 2% over two years.
Answers: 2
Mathematics, 21.06.2019 20:00
Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.
Answers: 1
Mathematics, 21.06.2019 22:50
Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables
Answers: 3
Mathematics, 22.06.2019 04:10
You are in charge of the customer service phone line with many employees. at the end of each phone callthe customers are asked to rate their service from 1 to 5 stars, with 5 being the best. you find the averagerating for 20 randomly selected employees and decide you want to improve the ratings so you require thoseemployees to go through a new training program. you then wait a week and find the new average rating foreach employee. the average change is an increase in 1.3 stars with a standard devation of .9 stars.(a) is this data paired or not paired? (b) what are the null and alternative hypothesis being tested? (c) what is the t-statistic you would use? write the general formula and the final calculation.(d) sketch a t-distribution, label your t-statistic and the probability you would be interested in:
Answers: 2
State whether the following statement is true or false, and explain why. If the statement is false...
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