Let X be the number of workouts a person does in a week. Suppose that X has the following probabilitydistribution:3edC#$SB4CA. What is the expected number of workouts a personStandard deviation =rExpected valueB. What is the standard deviation of the number of workouts a personfVYou can use the tool below to help you compute standard deviation.%5tcab6X 0Pp| 0.09Ollyhhop&7n1230.14 0.43 | 0.25Oudoes perRound to 2 decimal places, as needed.does per week?jRound to 2 decimal places, as needed.* 00week?840.093k(9O<altOрctrl[?+ 11=1<backs1

Let X be the number of workouts a person does in a week. 4

Answered: et X be the number of workouts a person…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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I Professor Brown administered an achievement test, which as he remembers from years of experience, yielded a population mean score of 85. If his class of 25 students obtained a mean score of 89 with standard deviation score of 14, can the professor claim that his class is a superior class? Assume that the mean score is approximately normally distributed. Use a = 0.01
Calcium levels in people are normally distributed with a mean of 9.4 and a standard deviation of 0.4 . Individuals with calcium levels in the bottom 10% dL of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
The average amount of money spent for lunch per person in the college cafeteria is $6.24 and the standard deviation is $2.05. Suppose that 6 randomly selected lunch patrons are observed. Assume the distribution of money spent is normal, and round all answers to 4 decimal places where possible.What is the distribution of ¯x?
Look at this histogram of heights from the GSS, which happens to be a case where a variable is relatively close to Normally-distributed (Normal curve laid atop for reference). Although it is tough to “eyeball” standard deviations, I am going to give you a list of values that could possibly describe one standard deviation of this distribution. Only one is even in the “ballpark”. Please select it based on your knowledge of Normal distributions. a. One inch b. Four inches c. 20 inches d. 50 inches
Calculate : (i) Quartile deviation (Q.D.), and (ii) Mean Deviation (M.D.) from mean, f the following data : Marks. : No. of Students : 3. 0-10 6 10-20 5 20-30 30-40 40-50 15 50-60 60-70 3
Ch 8 FRQ ( The distribution of average speeds of the top 53 drivers in NASCAR is roughly symmetric, unimodal, and bell-shaped, with a mean of 184.8 mph and a standard deviation of 7.2 mph. In the space above, draw a Normal Curve, from z=-3 to z=+3. Draw vertical lines at the mean and each whole number standard deviation above and below the mean. Write two rows of numbers under the base line; one row with the number of standard deviations above and below the mean (z-scores), and a row under that with the actual values for this problem. ] What percent of drivers would you expect to have speeds below 199.2 mph ? Show all work. s] What is the area under the curve to the left of a speed of 170.4mph Show all work. What is the probability that a driver selected at random will have a speed below 172.0 mph ? Show all work. B] What percent of drivers would you expect to have a speed above 177.0 mph ? Show all work. How many drivers would you expect to have speeds between 170.4 mph and 177.0 mph…
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A distribution of values is normal with a mean of 197.6 and a standard deviation of 24.6.Find P40, which is the score separating the bottom 40% from the top 60 P40 =
Claim: The standard deviation of pulse rates of adult males is more than 12 bpm. For a random sample of 172 adult males, the pulse rates have a standard deviation of 11.5 bpm. Find the value of the test statistic?
↑ N S Bags of Halloween candy are sold in 12 ounce packages. The company claims the standard deviation of the weight of the packages is 0.4 ounces. a. What is the expected mean weight of random samples of 10 packages? Mean -= 12 ounces Mean type your answer... b. What's the variation in that mean weight? Find SD (2). Standard Deviation type your answer..... Previous #m 3 X e d C S4 $ C r f % 5 V ounces t 9 A 6 ounces DELL Oll b y h & 7 O c U 11 *00 8 O m i k 61 ( 9 V O alt O A Р ctrl 11 { ? Nex 4 +
Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.

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