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Q1. For this assignment you will be provided with 2 clinical research questions on sample size and one published paper to determine the power of the primary outcome measure reported in the study.
Q2. A survey is being planned to estimate the prevalence of secondary infertility amongst couples aged 20-45. The investigators expect the prevalence to be 10%, and would like to estimate it to within 5% of the true value (with 90% confidence). How many couples are required?
Students will conduct one brief research exercise that will be written up as a research report using APA style.
The sampled results show that sample mean and standard deviation were $52.00 and $17.50, respectively. Use this information to create a 95% confidence interval for the mean.
At the .02 significance level can we conclude that the mean time to correcting a shipment is less than 10 minutes? Do the following: Compute the value of the test statistic.
The top motivation is for using a credit card. Can you conclude that there has been a chagne in the claimed or expected distribution? Use a =0.025.
Finding appropriate z- and t-scores is important when constructing confidence intervals. Confidence intervals allow one to estimate important population parameters such as population mean, population proportion, population standard deviation, etc. We..
A prestigious university requires a score of at least 750 on a graduate exam for admission to its MBA program. Suppose the graduate exam is normally distributed with a mean of 500 and a standard deviation of 200.
What is the average time that catalog customers must wait before their calls are transferred to the order clerk? (b) What is the average number of callers waiting to place an order?
The means of two normally distributed populations, where the unknown population variances are assumed to not be equal. What is the upper confidence limit is?
table given below presents the number of surface finish defects in the primer paint found by visual inspection of
Write down the differential equations which describe the probabilistic behavior of the unit in time as a Markov process.
Draw the OC curve. If the average number of defects increased by to 10 per tractor, what would the probability of detecting the shift in a control chart?
A poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
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