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It is known that the serum cholesterol level of females is normally distributed and its population variance is 45 mg/100 mL. Researchers decided to estimate the population mean serum cholesterol level. They observed a sample average serum cholesterol level of 220 mg/ml in 35 females.
a. Compute a 95% confidence interval for the population mean serum cholesterol level of females
b. Researchers at another university are going to collect new data and they are assuming that the female serum cholesterol level is Normally distributed with population variance of 45. How many subjects do they have to observe in order to have a 95% confidence interval with a final length of at most 3?
Identify the independent variables as quantitative or qualitative.- Write the first-order model for E(y).- Write a model for E(y) that contains all first order and interaction terms.
(a) Define the term probability. How is it measured? What range can the measures take and what do they mean?
What is the probability that the male is doubly dominant?
for a particular age group of adult males, the distribution of cholesterol readings, in mg/dl, is normally distributed with a mean of 210 and a standard deviation of 15. What percentage of this population would have readings exceeding 250?
A. How many students listed the same favorite movie. B. How many students had pets. C. How many students cared about the environment.
What must be true about the data sets to make the confidence intervals you constructed in parts (a) and (b) valid?
suppose that x and y are discrete random variables with a joint probability mass function pxyx y.a. generate x pxx.b.
a company is criticized because only 17 of 48 executives at a local branch are women. the company explains that
Based on these data, explain whether or not course attendance had any effect on determining of a restaurants violation of health code.
An individual's credit score is a number calculated based on that person's credit history that helps a lender determine how much he/she should be loaned or what credit limit should be established for a credit card.
A consumer survey has derived the following probability distribution for the number of coffee cups drunk per day by adult New Zealanders:
Estimate the true proportion of ERS calls that involved serious mechanical problems requiring towing and construct a 95% confidence
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