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A purchasing agent at the Kelly Bread Company wants to estimate the mean daily usage of rye flour. She takes a sample for 50 straight days and finds that the sample mean is 180 pounds with a sample standard deviation of 38.5 pounds.a.) State the 90% confidence interval for the mean (Round to hundredths)b.) State the margin of error (Round to Tenths)** Must show T1-83/84 Calculator function used and what numbers were typed in to arrive at answer ** Must show problem using a formula, please type out formula and the number's you used for that formula
What is the difference between a bernoulli distribution and a poisson distribution? How can they be applied to a standardized normal distribution, specifically when looking at a histogram?
In recent years the irradiation of food to reduce bacteria and preserve the food longer has become more common. A company that performs this service has developed four dierent methods of irradiating food. To determine which is best, it conducts a..
A paper company is interested in estimating the proportion of trees in a 500-acre forest with diameters exceeding 2 feet. The company selects 25 plots (100 feet by 100 feet) from the forest and utilizes the information from the 25 plots to help..
Let variable X represents the improvement in time for each assembly line worker. Let μ represents the average improvement in time for the population. Has the training improved the time required on the job? Please test the hypothesis use α=0.05 ..
5. A laboratory weights filters from a coal mine to measure the amount of dust in the mine atmosphere. Repeated measurements of the weight of dust on the same filter has a standard deviation of σ = 0.08 milligram (mg) and mean 123 mg.
What is the sample space and what is the probability of obtaining a total of 5 for the two cards?
Which statistic is used to test a hypothesis a regression equation?Select one:a. t-statisticb. z-statistic
Develop 95% confidence intervals for the proportion of all students, the proportion of male students, and the proportion of female students who were involved in some type of cheating.
Reflection to date
quantitative analysis for decision making course assignment. 1- graphical solutions in linear programming have limited
Find a research article that uses a confidence interval. Give either the citation for it or the website address at which you found it. Discuss what the research was trying to show, as well as the results from the confidence interval. Give a little bi..
What demographic variables were measured at least at the interval level of measurement and what statistics were used to describe the length of labor in this study? Were these appropriate?
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