5. If the error for estimating µu was within 4 units, how many should we sample at 98% Confidence level to accomplish that if s = 29?
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- The pulse rates of 215 randomly selected adult males vary from a low of 33bpm to a high of 121 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 99% confidence that the sample mean is within 5 bpm of the population mean.At 90% confidence, how large a sample should be taken to obtain a margin of error of 0.017 for the estimation of a population proportion? Assume that past data are not available for developing a planning value for p*. Round up to the next whole number.The population standard deviation for the age of GPTC students is15 years. If we want to be 95% confident that the sample mean age is within two years of the true population mean age of GPTC students, how many randomly selected GPTC students must be surveyed? Round your answer UP to the next higher interger to ensure that the sample sizi large enough.
- The scores for a certain standardized test have a population mean of μ=285 with a population standard deviation σ=125. You take an SRS of size 400 find that the sample mean \bar x is 288. The margin of error in a 90% confidence interval for μ based on this sample isPlease solve by using R calculator or excel. Show all work.A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 4 points with 99% confidence assuming s=10.7 based on earlier studies? Suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
- An automobile manufacturer wants to estimate the mean gasoline mileage that its customers will obtain with its new compact model. How many sample runs must be performed so that the estimate is accurate to within 0.5 mpg at 98% confidence? Assume that ? = 2Please see below. I need help with this.Sample Size: We have established that the body weights of 20-29 year old U.S. males are σ=40 pounds. How many observation do we need in order to estimate mean body weight µ with 95% confidence and a margin of error of ± 10 pounds?
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