17. Company A claims that their product is more consistent than the competition, Company B. We have been collecting data from Company B for many years and feel certain that Company B has a mean of u = 23.5 and a standard deviation of o=.43. W wish to perform an a= .05 level test. We now collect 10 pieces of data from Company A. The mean of that data is 24.6 and the standard deviation of that data is .36. What is your data value (test statistic) for this problem (3-decimal places)? Type your answer here Write the exact same data value again (3-decimal places) Type your answer here What is your chart number for this problem? Type your answer here

17. Company A claims that their product is more consistent than the competition, Company B. We have been collecting data from Company B for many years and feel certain that Company B has a mean of u = 23.5 and a standard deviation of o=.43. W wish to perform an a= .05 level test. We now collect 10 pieces of data from Company A. The mean of that data is 24.6 and the standard deviation of that data is .36. What is your data value (test statistic) for this problem (3-decimal places)? Type your answer here Write the exact same data value again (3-decimal places) Type your answer here What is your chart number for this problem? Type your answer here

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Description: 17. HT2Fill in the BlanksType youranSwers In all of the blanks and submlt17. Company A claims that their product is more consistent than thecompetition, Company B. We have been collecting data from Company Bfor many years and feel certain that Compa

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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Suppose that the quarterly sales levels among health care information systems companies are approximately normally distributed with a mean of 8 million dollars and a standard deviation of 1.3 million dollars. One health care information systems company considers a quarter a "fallure" if its sales level that quarter is in the bottom 10% of all quarterly sales levels. Determine the sales level (in millions of dollars) that is the cutoff between quarters that are considered "failures" by that company and quarters that are not. Carry your Intermediate computations to at least four decimal places. Round your answer to one decimal place. million dollars X S Save For Later Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use 4 O * Check tab esc ! 1 ← 9. a @ 2 → W S # N = 3 C e $ 4 d r % 5 f acer Oll A t 6 g O. & 7 y h * u 8 j ( 1 9 k m 0 O P 1 M Submit Assignment Privacy Center Accessibility 10:12 backspace { 1 8民口團 11 D ?
Let's consider the annual precipitation levels in Los Angeles county. Suppose the average annual precipitation in LA county is normally distributed with a mean of 15 inches and a standard deviation of 3 inches. We can classify the precipitation levels in the following way: Dry Annual precipitation is more than 1 standard deviation below the mean. Normal Annual precipitation is less than 1 standard deviations below the mean and less than 2 standard deviation above the mean. Humid Annual precipitation is more than 2 standard deviations above the mean. Before answering the following questions it may be helpful to mark on a bell shaped curve where the above regions lie. According to the empirical rule, what is the probability of experiencing a Dry year in Los Angeles? According to the empirical rule, what is the probability of experiencing a Humid year in Los Angeles? According to the empirical rule, what is the probability of experiencing a Normal year in Los…
Please explain
Researchers are interested in the effect of pet companionship on depression in elderly adults. They randomly select 25 participants from the target population and record their depression scores before and after spending a month with a dog (a higher score indicates a higher level of depression). The researchers then compute the difference scores for each participant (difference after before). The mean of differences is -1 and the standard deviation of differences is 2. Can the researchers conclude that there is an effect of pet companionship on depression in elderly adults? Conduct the appropriate statistical test (two-tailed) with a = .05. Should you reject or fail to reject the null hypothesis? Reject O Fail to reject
What test can be used to test the difference between two means when the population standard deviations are known Ox² Oz Ot OF
4. A fertilize company tests blends of fertilizer with hybrid seeds to accurately determine yields. Consistency is desired, so the fertilizer company wants to test the variability of yields. In years past, the farm harvested an average of 88 bushels per acre, with a standard deviation of 6 bushels per acre. acre plots the fertilize company collected data suggesting that the standard deviation of the yield was 5 bushels per acre. blend higher than the old? This year, the farm altered the blend a bit. On 20 one- Is the variance of the new The company wants to use a 10% significance level. Ho: Ha: Decision Rule: Decision: Conclusion:
4. The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of 18c. A study was done to test the claim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 93¢ with a standard deviation of 17¢. Do the data support the claim at the 1% level?
1.23. |Mean and standard deviation. Enter the following data into the Data tab in the One-Variable Statistical Calculator applet: 8, 9, 10, 11, 12. Examine the Statistics tab and report the mean and the standard deviation. |Mean for different data. Refer to the previous exercise. Consider the data 8, 8, 9, 9, 10, 10, 11, 11, 12, 12. 1.24. (a) How would you expect the mean for these data to differ from what you found in the previous exercise? (b) Check your answer to part (a) using the One-Variable Statistical Calculator applet. (c) Repeat parts (a) and (b) of this exercise for the following data: 8, 8, 9, 9, 10, 10, 11, 11, 12, 13. Write a short explanation for what you have found. |Standard deviation for another set of data. Refer to Exercise 1.23. Consider the data 6, 8, 10, 12, 14. 1.25. (a) How would you expect the standard deviation for these data to differ from what you found in Exercise 1.23? (b) Check your answer to part (a) using the One-Variable Statistical Calculator applet.
This research was conducted with Korean adolescents in the Los Angeles area. Would you be willing to generalize the results of this study to Korean adolescents who live in other regions of the country? Why or why not.
In Professor Krugman’s economics course, the correlation between the students’ total scores prior to the final examination and their final‑examination scores is ?=0.5.r=0.5. The pre‑exam totals for all students in the course have mean 280280 and standard deviation 40.40. The final‑exam scores have mean 7575 and standard deviation 8.8. Professor Krugman has lost Julie’s ﬁnal exam but knows that her total before the exam was 300.300. He decides to predict her ﬁnal‑exam score from her pre‑exam total. (a) Which of the choices is the least‑squares regression line of ﬁnal‑exam scores on pre‑exam total scores in this course?
In Professor Krugman's economics course, the correlation between the students' total scores prior to the final examination and their final‑examination scores is ?=0.5.�=0.5. The pre‑exam totals for all students in the course have mean 280280 and standard deviation 40.40. The final‑exam scores have mean 7575 and standard deviation 8.8. Professor Krugman has lost Julie's ﬁnal exam but knows that her total before the exam was 300.300. He decides to predict her ﬁnal‑exam score from her pre‑exam total. © Macmillan Learning (a) What is the slope of the least-squares regression line of final-exam scores on pre-exam total scores in this course? Give your answer to one decimal place. slope: What is the intercept? Give your answer as a whole number. intercept:
4. The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of 18¢. A study was done to test the claim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 93¢ with a standard deviation of 17¢. Do the data support the claim at the 1% level?