Answered: 6. A researcher claims that the average… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.6: Summarizing Categorical Data

Problem 30PPS

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a. state the null and alternative hypothesis b. find the critical value/s and test value c. make the decision d. conclusion

6. A researcher claims that the average cost of men's athletic shoes is less than Php 4,000. He selects a sample
of 30 pairs of shoes from a catalog and finds out the following costs (in peso). Is there enough evidence to
support the researcher's claim at a = .10?
2,500
1,200
3,200
2,000
4,600
5,000
6,000
2,100
4,000
3,700
3,000
4,000
1,800
4,200
6.200
1,500
4,500
3,200
1,900
4,300
2,000
3,000
3,600
5,500
3,800
1,000
7,000
5,200
6,200
4,900
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b) In a company having 80 employees, 60 earn Rs. 3 per hour and 20 earn Rs. 2 per hour. Determine the mean earning per hour
If an economist wants to determine whether there is sufficient evidence that the average monthly family income in a community exceeds Php40000, A. Either a one-tailed or two-tailed test could be used. B. A one-tailed test should be used. C. A two-tailed test should be used. D. A t-test should be used.
if SS total = 8.3 and SS between What is SS error ? = 4.6, -
4. A company pays an average of Php 100.00 per hour with a standard deviation of Php 15.00. If the pay for the employees is more or less distributed normally, find the following: a. Percentage of workers receiving less than Php 95.00; b. Percentage of workers receiving above Php 132.00; c. Percentage of workers whose pay is between Php 68.00 to Php 140; d. If the number of workers is 750, how many workers receiving a pay between Php 85.00 to Php 115.00.
1. The following salaries (in pesos) were obtained from a sample of 12 executive secretaries: 7,500 13,000 10,300 7,600 10,600 8,350 8,400 5,800 6,300 9,200 7,500 9,466 (a.) Find the point estimate for the mean and standard deviation of the salaries of all the executive secretaries (b.) What is the proportion of executive secretaries with salaries above Php. 9,000.00? 2. Mr. Santiago's company sells bottled coconut juice. He claims that a bottle contains 500 ml of such juice. You wanted to know if his claim is true. They took 6 random samples of 10 bottles. Sample 1 500 498 497 503 499 497 497 | 497 497 495 Sample 2 500 500 | 495 494 498 500 500 500 500 497 Sample 3 497 497 502 496 497 497 497 497 497 495 Sample 4 495 500 497 497 500 500 495 497 497 501 Sample 5 497 497 499 496 |497 497 499 500 500 502 Sample 6 496 495 | 497 497 500 500 496 497 496 497 Based on the point estimate, would you say that the claim is true?
Any quantity that is computed from a sample is called
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6. In March 2010, the Pew Research Group surveyed 1708 adults Americans and asked, "Do you believe the USA was right or wrong to in using military force against Iraq?" Of the 1708 adults surveyed, 1186 stated the USA made the correct decision. In January of 2020, the Pew Research group asked the same question to 1375 adult Americans and found that 934 still share the same opinion that military force was correct. Is there significant evidence to support the claim that this proportion is lower now than it was in 2010? Use alpha = 0.05 a. Set up the Hypotheses and indicate the claim H0: Ha: b. Decision rule. please show the rejected region c. Computation d. Decision e. Interpretation
1. The weight of the washing powder contained in a box is normally distributed and its mean value is, following the producer, 3kg. A sample gave results [0 2, 93 2,97 3, 05 2,91 3, 02 2,87 2,92 Verify the claim of the producer versus the opinion of that average value is less than 3kg. Put [Ans.1, 95 € (1,94; ) we reject the claim of the producer] a = 0,05.
7. Bob earned 116 on his accounting midterm and 82 on his biology exam. For the accounting exam the mean score was 102 with standard deviation 14. For the biology exam the mean was 70 with standard deviation 5. a) Convert each exam score to a standard score z. b) On which test did he do better compared to the rest of the class?
The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls, Iowa was $37. The restaurant manager believes that the mean may be higher this year. State the appropriate null and alternative hypotheses.
Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were: Sample 1 2 3 4 5 6 Sample Mean (in.) 8.900 8.902 8.889 8.908 8.899 8.897 Range (in.) Sample Sample Mean (in.) Range (in.) 7 8.903 8 8.907 9 8.895 10 8.903 11 8.901 12 8.906 For the given data, the x = 8.9008 inches (round your response to four decimal places). Based on the sampling done, the control limits for 3-sigma x chart are: Upper Control Limit (UCL) = inches (round your response to four decimal places). 0.033 0.041 0.034 0.051 0.031 0.036 0.041 0.034 0.027 0.029 0.039 0.047

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