What is the Expected Value for the following numbers?XP(X)0.020.090.0500.020.140.050.230.020.160.22012345678910

The following information has been provided: X P(X) 0 0.02 1 0.09 2 0.05 3 0 4 0.02 5…

Answered: What is the Expected Value for the…

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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Bone mineral density and cola consumption has been recorded for a sample of patients. Let x represent the number of colas consumed per week and y the bone mineral density in grams per cubic centimeter. Based on the data shown below answer the questions rounding your final answers to four decimal places. (a) Create a scatter plot with linear regression line for the data. (2 points) y = X + (b) Interpret the slope of the regression equation in a complete sentence. (2 points) (C) Use the linear correlation coefficient to determine if there is correlation. (5 points) r = Is there correlation at the 0.05 level of significance? (2 points) no О yes
Q.2: Mr. Ahmed is planning to recruit some additional sales staff for his company Al Khalif LLC. Since the sale varies from time to time, he decided to recruit staff if average sales is more than RO 35000. Following are the details of his company's sales for past 50 days. Sales 00- 10-20 20-30 30-40 40-50 50-60 60-70. 70- ('000RO) 10 80 No. of 05 07 10 05 08 05 05 05 days a) What would you suggest Mr. Ahmed regarding recruitment of sales staff? Give reason for your answer. b) What is the mode sale of the company? Why do you calculate mode sales?
P(-0.34
The mean and median of Al's n = 3 observa- tions both equal 10. The mean and median of Bev's n = 5 observations both equal 18. (a) Carol combines Al's and Bev's data into one collection of n 8 observations. Can the mean of Carol's data be calculated from the information given? If you think not, just say that. If you think it can, them calculate Carol's mean. (b) Refer to part (a). Demonstrate, by an ex- plicit example, that there is not enough information to determine Carol's median. Hint: Find two sets of data sets that sat- isfy Al's and Bev's conditions, yet, when combined, give different medians.
Find the standard deviation x P(x) 00.06 1 0.06 2 0.32 3 0.28 40.28
I need help solving the following problem in the attached image.
8. Find the standard deviation. (Enter an exact number as an integer, fraction, or decimal.) x P(x) x*P(x) (x − ?)2P(x) 3 0.1 3(0.1) = 0.3 (3 − 6.4)2(0.1) = 1.156 5 0.3 5(0.3) = 1.5 (5 − 6.4)2(0.3) = 0.588 7 0.4 7(0.4) = 2.8 (7 − 6.4)2(0.4) = 0.144 9 0.2 9(0.2) = 1.8 (9 − 6.4)2(0.2) = 1.352
5
Pedro thinks that he has a special relationship with the number 1. In particular, Pedro thinks that he would roll a 1 with a fair 6-sided die more often than you'd expect by chance alone. Suppose p is the true proportion of the time Pedro will roll a 1. (a) State the null and alternative hypotheses for testing Pedro's claim. (Type the symbol "p" for the population proportion, whichever symbols you need of "<", ">", "=", "not =" and express any values as a fraction e.g. p = 1/3) H0 = Ha = (b) Now suppose Pedro makes n = 42 rolls, and a 1 comes up 9 times out of the 42 rolls. Determine the P-value of the test: P-value = (c) Answer the question: Does this sample provide evidence at the 5 percent level that Pedro rolls a 1 more often than you'd expect? (Type: Yes or No)
The failure time (T) of an electronic circuit board follows exponentially distribution with failure rate λ = 10−4/h. What is the probability that (i) it will fail before 1000 h? (ii) it will survive at least 10,000 h ? (iii) it will fail between 1000 and 10,000 h? (iv)Determine the mean time to failure. .
Pedro thinks that he has a special relationship with the number 6. In particular, Pedro thinks that he would roll a 6 with a fair 6-sided die more often than you'd expect by chance alone. Suppose ?p is the true proportion of the time Pedro will roll a 6. (a) State the null and alternative hypotheses for testing Pedro's claim. (Type the symbol "p" for the population proportion, whichever symbols you need of "<", ">", "=", "not =" and express any values as a fraction e.g. p = 1/3) ?0 = ?? = (b) Now suppose Pedro makes n = 34 rolls, and a 6 comes up 7 times out of the 34 rolls. Determine the P-value of the test: P-value = (c) Answer the question: Does this sample provide evidence at the 5 percent level that Pedro rolls a 6 more often than you'd expect? (Type: Yes or No)
Empirical research on stock market data for two consecutive trading days indicates that 40% of the stocks that went up on the first day also went up on the second day. Yesterday, 600 stocks went up. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p, where p gives the proportion of the 600 stocks that went up yesterday that will go up today. ? (b) Find the standard deviation of p. (c) Compute an approximation for P(p <0.39), which is the probability that fewer than 39% of the stocks that went up yesterday will go up again today. Round your answer to four decimal places.

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What is the Expected Value for the following numbers? P(X) 0.02 0.09 0.05 0 0.02 0.14 0.05 0.23 0.02 0.16 0.22 0 2 3 4 5 6 7 8 9 10