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The total cholesterol level of US females 2 years old or older is normally distributed with a mean of 206 mg/dl and a standard deviation of 44.7 a. determine the percentage of US females 20 years old or older who have a serum total cholesterol level between 1150 mg/dl and 250 mg/dl b. determine the percentage of US females 20 years old or older who have a serum total cholesterol level below 220 mg/dl c. obtain and interpret the quartiles for serum total cholesterol level of US females 20 years old or older d. find the and interpret the fourth decile for serum total cholesterol level of US females 20 years old or older
The standard deviation for the costs of all doctors visits is $35.15, estimate with 95% confidence the average cost of a doctors visit for all the patients of this medical clinic.
The front hall display case. The display case is 30 inches tall. Which scale will allow her to make the tallest model that will fit in the display case?
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
When estimating the mean of a population, how large must the sample be in order that the 95% error margin is 1/8 the standard deviation?
Draw a histogram showing the 20 sample means. (Use classes -0.5 to 0.5, 0.5 to 1.5, 1.5 to 2.5 and so on). Describe the distribution of the x-bars that you see in part b (shape of distribution, center, and the amount of dispersion).
Borst et.al. investigated the relation of ego development, age, gender, and diagnosis to suicidality among adolescent psychiatric inpatients.
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
What is the probability that the cereal would be high fiber? In other words, what is P (high fiber)?
Houston is $19,900 and in Los Angelos is $21,800. What is the probability that a brand manager in Houston has a base salary in excess of $100,000?
Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.
The membership for the club this year isobserved to be 14 freshman, 19 sophomores, 51 Juniors and 16Seniors. At 95% level of confidence, test the advisors belief..
A normal distributed population has a mean of 250 pounds and a standard deviation of 10 pounds. Given n = 20, what is the probability that this sample will have a mean value between 245 and 255 pounds?
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