For problems 30 to 32, refer to the following: The price-earnings ratio for 19stocks in the retail trade category are: 8.6, 9.9, 9.8, 9.4, 9.1, 11.5, 8.0, 10.4, 10.2,11.1, 10.5, 8.3, 8.7, 8.4, 11.9, 9.9, 9.1, 8.3, 10.730. How many observations fall above the 7th decile of the price-earnings ratio?O A. 5В. 6O C.7O D. 831. What is the first quartile value of the price-earnings ratio?O A. 8.3B. 8.65O C. 10.45O D. 11.1832. How many observations fall below the 1st quartile value of the price-earningsratio?A. 5В. 6O C.7D. 8O OO OO O

Here given 19 data of price earning ratio...arrange given data in ascending order further steps are…

Answered: 30. How many observations fall above…

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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7. A five-stage progressive die has four critical dimensions. X is 25.30, 14.82, 105.65, and 58.26 mm and R is 0.06, 0.05, 0.07, and 0.06 for the dimensions. Can a deviation chart be used? Let RTotal equal the average of the four range values. Step by step explanation please
mean of the process is the estimate developed in part (a). Twenty-five samples of 100 items each were inspected when a process was considered to be operating satisfactorily. In the 25 samples, a total of 135 items were found to be defective. What is an estimate of the proportion defective when the process is in control? b. a. What is the standard error of the proportion if samples of size 100 will be used for statistical process control? Compute the upper and lower control limits for the control chart. C.
8. A list of exam scores shows that the raw score of X = 50 corresponds to z = -2.00 and a raw score of X = 62 corresponds to z = +1.00. Find the mean and standard deviation for the distribution of raw scores.
7. Female Pulse Rates Pulse rates of adult females are listed in Data Set 1 “Body Data” in Appendix B. The lowest pulse rate is 36 beats per minute, the mean of the listed pulse rates is x = 74.0 beats per minute, and their standard deviation is s = 12.5 beats per minute. a. What is the difference between the pulse rate of 36 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 36 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between - 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 36 beats per minute significant?
3. A data set is normally distributed with a mean of 50 and a standard deviation of 8. What percent of data are (a) less than 60? (b) greater than 36? (c) greater than 56? (d) between 46 and 62?
7. What is the z-score of x = 7, if it is 0.133 standard deviations to the left of the mean? (Enter an exact number as an integer, fraction, or decimal.)z =
The mean score for first exam in your first organic chemistry class (section A) was 60, with a standard deviation of 5. Your score on the exam was 70. A. How many standard deviations above the mean is your score?
6. A comparison of life expectancy in random samples of 40 less-developed countries and 31 industrialized countries reveals the following (fictional) data. The standard deviations are significantly different from one another. Is there a significant difference in mean life expectancy between countries with these two levels of economic development? X=life expectancy of the resident at birth. Less-Developed Countries Mean=66.1 years N=40 Standard error of the difference between means=.60 Industrialized Countries Mean=76.7 years N=31
6. Interval estimation when o is unknown (the data “Alcohol" is provided) Consumption of alcoholic beverages by young women of drinking age has been increas- ing in the United Kingdom, the United States, and Europe (The Wall Street Journal, Feb- ruary 15, 2006). Data (annual consumption in liters) consistent with the findings reported in The Wall Street Journal article are shown for a sample of 20 European young women. 266 82 199 174 97 170 222 115 130 169 164 102 113 171 93 93 110 130 Assuming the population is roughly symmetric, construct a 95% confidence interval for the mean annual consumption of alcoholic beverages by European young women.

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