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1. A recent study reported that the prevalence of hyperlipidemia (defines as total cholesterol over 200) is 30 % in children 2 to 6 years old of age. If 12 children are analyzed. a) What is the probability that at least 3 are hyperlipidemia? b) What is the probability that at exactly 3 are hyperlipidemia? c) How many would be expected to meet the criteria for hyperlipidemia? 3. Total cholesterol in children age 10 to 15 is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4 a) What proportion of children 10 to 15 years of age have total cholesterol between 180 and 190? b) What proportion of children 10 to 15 years of age would be classified as hyperlipidemia? Assume that hyperlipidemia is a total cholesterol level of 200 over. 6. A study is conducted to assess the impact of caffeine consumption, smoking alcohol consumption and physical activities on cardiovascular disease. Suppose that 40% of participants consume caffeine and smoke. If 8 participants are evaluated what is the probability that. a) Exactly half of them consume caffeine and smoke? b) More than 6 consume caffeine or smoke? c) Exactly 4 don not consume caffeine or smoke? 10. Diastolic blood pressure are assumed to follow a normal distribution with a mean of 85 and standard deviation of 12 a. What proportion of people have diastolic blood pressure less than 90? b. What proportion of people have diastolic blood pressure between 80 and 90?
Mall security estimates that the average daily per-store theft is no more than $250, but wants to determine the accuracy of this statistic. The company researcher takes a sample of 64 clerks and finds that =$252 and s = $10.
1. Discuss the following concepts and give examples from everyday life in which you might encounter each concept. Hint: For instance, consider the experiment of arriving for class. Some possible outcomes are not arriving (missing class), arriving on ..
Evaluate the relationship between visits per week and week. Interpret your regression results by discussing significance of the regression equation and magnitude of the estimated coefficients.
What is your linear speed in feet per minute
the following data summarize the results from an independent-measures study comparing three treatment
If the budget analyst wanted to build a regression model using only two independent variables to predict nursing salaries, what variables should be used?
Suppose that you wish to invest in two stocks which both have a current price of $1. The values of these two stocks in one month are described by two random variables, say, X 1 and X 2 . Suppose that the expected values and variances of X 1 and..
the pdf for frechet distribution is ltbrgtfxa?a x-?-a-1 exp-x-?-a ltbrgtthen how we can calculate the cdf for frechet
A company manufactures microwave for popcorn and claims that only 2% of the popcorn failed to pop. Another company who is competitor believes that percentage could be much higher. So this second company does tests with 3000 kernels and finds ..
1. if the mean number of hours of television watched by teenagers per week is 12 with a standard deviation of 2 hours
A steel company is producing steel for a new contract. The contract specifies the information in the following table for the steel. MATERIAL MINIMUM MAXIMUM Maganese 2.10% 3.10% Silicon 4.30% 6.30% Carbon 1.05% 2.05% The steel company mixes batches o..
Probabilities
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