7) What must be the sum of the P(X) in the mean and variance of discrete randomconvariable?C. 100%D. 1 000%A. 1%В. 10%*For numbers 8- 10, use the data below.The number of boxes of face mask being sold by a pharmacy per day are 5, 6, 7, 8, 9, and 10along with the probabilities of 0.2, 0.1, 0.1, 0.1, 0.2, 0.3.8) Based on the data given, more likely, how many boxes of face mask would thepharmacy sell per day?А. 5В. 6С.8D. 109) What is the mean of the discrete random variable?A. 5.9В. 6.9С. 7.9D.8.910) Which of the following statements best interpret the computed mean?A. The pharmacy would sell more or less 8 boxes of face mask per day.B. The pharmacy would sell8 boxes of face mask per day.C. The pharmacy would sell exactly 7 boxes of face mask per day.D. The pharmacy would sell more than 7 boxes of face mask per day.

Given Information: The number of boxes of face masks being sold per day are 5, 6, 7, 8, 9, and 10.…

Answered: 8) Based on the data given, more…

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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There are 3 students that make up the total population of Summer Calculus students at ACM. Their grades on the first test were 80, 55, 57. a) What is the mean of this population? b) What is the variance of this population? c) What is the standard deviation of this population?
9. Carboxy- hemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to have a high percentage of carboxyhemoglobin in their blood (Reference: A Manual of Laboratory and Diagnostic Tests by F. Fischbach). Let x be a random variable rep- resenting percentage of carboxyhemoglobin in the blood. For a person who is a regular heavy smoker, x has a distribution that is approximately normal. A random sample of n-12 blood tests given to a heavy smoker gave the following results (percentage of carboxyhemoglobin in the blood): 9.1 9.5 10.2 9.8 11.3 12.2 11.6 10.3 8.9 9.7 13.4 9.9 Where = 10.49 and s = 1.36. A long-term population mean u -10% is considered a health risk. However, a long- term population mean above 10% is considered a clinical alert that the person may be asymptomatic. We will investigate the claim: the data indicate that the population mean percentage is higher than 10% for this patient? Use a = 0.05. a. Find the test statistic. b. Find the critical…
Assume that the height of male students in a large university is normally distributed with mean 172.7 cm and variance 57.76 cm². (a) Suppose 80 random samples, each with 25 male students are obtained. In how many samples would you expect the sample mean to be between 169.66 cm and 173.46 cm? Give you answer to one decimal place. Answer: number of samples = (b) Suppose 6 random samples, each with 25 male students are obtained. Compute the probability that exactly 4 of the 6 samples will have its sample mean between 169.66 cm and 173.46 cm. Give your answer to two decimal places. Answer: probability=
Assume that females have pulse rates that are normally distributed with a mean of u = 76.0 beats per minute a. If 1 adult female is randomly selected, find the probability that her pulse rate is between 69 beats per min The probability is (Round to four decimal places as needed.) b. If 25 adult females are randomly selected, find the probability that they have pulse rates with a mean bet The probability is (Round to four decimal places as needed.) c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30? O A. Since the distribution is of sample means, not individuals, the distribution is a normal distribution fo OB. Since the distribution is of individuals, not sample means, the distribution is a normal distribution fo OC. Since the mean pulse rate exceeds 30, the distribution of sample means is a normal distribution fo O D. Since the original population has a normal distribution, the distribution of sample means is a norma
One of my homework questions... Given that X ~ N(300, 15). We survey 20 at a time and are interested in the distribution of X-bar. What can be said about the median of the random variable X-bar? The group of answer choices It is the same as the average of X. All answers are correct. It is the same as the average of X-bar. It is the same as the median of X. I think it's all of the above, but not totally sure
Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.
3. The taxi and takeoff time for commercial jets is a random variable x with a mean of 8 minutes and a standard deviation of 3 minutes. Assume that the distribution of taxi and takeoff times is approximately normal. a). Find the probability that for 36 jets the average taxi and takeoff time is less than 8.33 minutes per plane. b). Find the probability that for 36 jets the average taxi and takeoff times is more than 8.55 minutes.

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