14. Letters were received in an office on each of 100 days.Assuming the following data to form a random sample from a Poisson'sdistribution, fit the distribution and calculate the expected frequencies-4 - 0183.taking e Number of letters (x)Frequency (f)01142153422 2152068768290101

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Answered: 14. Letters were received in an office…

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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Ch6. "A carpet manufacturing company is comparing the tensile strengths of two different types of synthetic fiber. Synthetic fiber A used in manufacturing carpet has tensile strength that is normally distributed with mean 75 psi and standard deviation 8 psi, and synthetic fiber B has tensile strength that is 75 psi and standard deviation 12 psi. Random sample of nA = 16 and nB = 9 of fiber specimens are selected. Find the probability that the sample mean of fiber specimen A exceeds the sample mean of fiber specimen B by 4."
The average wait time to get seated at a popular restaurant in the city on a Friday night is 7 minutes. Is the mean wait time greater for men who wear a tie? Wait times for 12 randomly selected men who were wearing a tie are shown below. Assume that the distribution of the population is normal. 9, 5, 5, 7, 8, 5, 7, 7, 9, 5, 6, 9 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: pv = 7 H: pv> c. The test statistic t v = -0.352 (please show your answer to 3 decimal places.) d. The p-value = 0.3657 X (Please show your answer to 4 decimal places.) e. The p-value is >vV a vX the null hypothesis. f. Based on this, we should reject g. Thus, the final conclusion is that ... O The data suggest the populaton mean is significantly more than 7 at a = 0.10, so there is statistically significant evidence to conclude that the population mean wait time…
The average wait time to get seated at a popular restaurant in the city on a Friday night is 7 minutes. Is the mean wait time greater for men who wear a tie? Wait times for 12 randomly selected men who were wearing a tie are shown below. Assume that the distribution of the population is normal. 9, 5, 5, 7, 8, 5, 7, 7, 9, 5, 6, 9 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use t-test for a population mean b. The null and alternative hypotheses would be: Ho: P Select an answer H1: pv Select an answer v c. The test statistic (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is >v f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that .. O The data suggest the populaton mean is significantly more than 7 at a = 0.10, so there is statistically significant evidence to conclude that the population…
Assuming data re cholesterol indicated a mean total cholesterol level for adult persons 20 years of age and older in the United States was 190 mg/dl; with a known standard deviation of 30 mg/dl. The underlying population is normally distributed. 17. What is the probability that a randomly selected adult, ≥20 years of age will have a cholesterol level <170 mg/dl?
In a field test, 30 units have been tested for 125 hours each with the following failure times. In the event of a failure, the unit was repaired and the test continued. [Hint: use the exponential distribution] 10, 26, 31, 55, 75, 90, 120 What is the failure rate of the units based on this information? Write the Reliability function. What is the survival probability of the units at time 50 and time 100? Sketch the hazard plot based on the assumptions made. Solve for t at R(t)=0.90?
With the diagram please
Ch6. "A carpet manufacturing company is comparing the tensile strengths of two different types of synthetic fiber. Synthetic fiber A used in manufacturing carpet has tensile strength that is normally distributed with mean 75 psi and standard deviation 12 psi, and synthetic fiber B has tensile strength that is 70 psi and standard deviation 12 psi. Random sample of nA = 16 and nB = 9 of fiber specimens are selected. Find the probability that the sample mean of fiber specimen A exceeds the sample mean of fiber specimen B by 4."
Suppose the weight of turkeys in a store are normally distributed with mean 15.5 lb and standard deviation 2 lb. If a turkey is grabbed at random what is the probability that the weight will be less than 16 lb?
Q3 i) The average number of acres of land cultivated with food grains is normally distributed with mean 4,300 acres per year, and standard deviation of 750 acres. What is the probability that between 2,500 and 4,200 acres will be cultivated in any given year? What number of cultivated acres corresponds to the 38th percentile?
Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of 2.82.8 and a mean diameter of 210210 inches. If 8484 shafts are sampled at random from the batch, what is the probability that the mean diameter of the sample shafts would be less than 209.7209.7 inches? Round your answer to four decimal places.

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14. Letters were received in an office on each of 100 days. Assuming the following data to form a random sample from a Poisson's distribution, fit the distribution and calculate the expected frequencies taking e = 0183.