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1. BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2
a) A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?b) A BMI of 30 or more is considered obese. What proportion of children are obese?c) In a random sample of 10 children, what is the probability that their mean BMI exceeds 25?
What is a normal distribution? What is a Z-Value? Can you provide and example of how they relate?
Find out the critical value for the given degrees of freedom of the F-test also the lower-tailed critical value of F test for the similar level of significance
What does the binomial distribution chart look like? Can I use Excel to come up with this chart?
A University Web server has five main components each with the same reliability. All five components must work for the server to function as intended.
There is no proof the new policy is more effective, but we cannot finish the policy has no effect on smog. Interpretation of P-value for the given context.
Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
Make sure you include a complete ANOVA summary table. Also, report the appropriate null and research hypotheses and the critical value (alpha = 0.05).
Millie and Senta Meter have recently taken Pre and Post test in achievement. The test were normally distributed. Millie's percentile rank changed from 57.93 to 77.34. Senta's changed from 1.07 to 4.95.
Explain in detail what the optimum Neyman=Pearson test is for all values of the false alarm probability a in the open interval (0,1).
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
Many companies use sampling to determine whether a batch should be accepted. A (n, c) sampling plan consists of inspecting n randomly selected items from a batch and accepting the batch if c or fewer sampled items are defective.
Suppose ages for first marriages have normal distribution with standard deviation of four years. Determine the probability that the person getting married for first time is younger than 23 years of age?
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