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A semiconductor manufacturer produces devices used as central processing units in personal computers. The speed of the devices (in megahertz) is important because it determines the price that the manufacturer can charge for the devices. The following table contains measurements on 120 devices. 680 669 719 699 670 710 722 663 658 634 720 690 677 669 700 718 690 681 649 675 701 721 683 735 688 763 672 698 659 704 652 720 660 695 701 724 681 679 691 683 705 746 706 649 668 672 690 724 717 727 653 637 660 693 704 652 664 702 661 720 702 683 723 710 680 684 705 662 644 683 695 678 674 696 692 690 694 660 668 698 668 660 680 739 679 682 724 642 704 695 695 670 656 718 660 648 681 748 697 703 660 722 656 667 683 691 680 685 681 715 665 676 665 675 655 659 720 675 697 663 This data set: Homework4, has been uploaded with our Homework#4 folder, download and read this data to R studio and use it to answer the following questions. a) Calculate the following using R, mean, median, standard deviation and a summary statistic. b) State the meaning of the value of your standard deviation obtained from (a) above. c) Plot stem-and-leaf, dot plot, box plot and histogram. d) Describe the shape of the histogram and state whether the mean is a good measure or not. State a reason for your choice.

A semiconductor manufacturer produces devices used as central processing units in personal computers. The speed of the devices (in megahertz) is important because it determines the price that the manufacturer can charge for the devices. The following table contains measurements on 120 devices. 680 669 719 699 670 710 722 663 658 634 720 690 677 669 700 718 690 681 649 675 701 721 683 735 688 763 672 698 659 704 652 720 660 695 701 724 681 679 691 683 705 746 706 649 668 672 690 724 717 727 653 637 660 693 704 652 664 702 661 720 702 683 723 710 680 684 705 662 644 683 695 678 674 696 692 690 694 660 668 698 668 660 680 739 679 682 724 642 704 695 695 670 656 718 660 648 681 748 697 703 660 722 656 667 683 691 680 685 681 715 665 676 665 675 655 659 720 675 697 663 This data set: Homework4, has been uploaded with our Homework#4 folder, download and read this data to R studio and use it to answer the following questions. a) Calculate the following using R, mean, median, standard deviation and a summary statistic. b) State the meaning of the value of your standard deviation obtained from (a) above. c) Plot stem-and-leaf, dot plot, box plot and histogram. d) Describe the shape of the histogram and state whether the mean is a good measure or not. State a reason for your choice.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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A semiconductor manufacturer produces devices used as central processing units in personal computers. The speed of the devices (in megahertz) is important because it determines the price that the manufacturer can charge for the devices. The following table contains measurements on 120 devices. 680 669 719 699 670 710 677 669 700 718 690 681 702 696 692 649 675 701 721 683 735 688 763 672 681 722 663 658 634 720 690 679 691 683 705 746 706 649 668 717 727 683 652 720 660 695 701 724 668 698 668 660 653 637 660 693 679 682 704 652 664 702 661 720 695 670 656 723 710 680 684 705 681 662 644 683 695 678 674 724 748 697 690 656 667 683 698 672 642 694 660 659 704 690 724 680 739 704 695 718 660 648 703 660 722 691 680 685 681 715 665 676 665 675 655 659 720 675 697 663 This data set: Homework4, has been uploaded with our Homework#4 folder, download and read this data to R studio and use it to answer the following questions. a) Calculate the following using R, mean, median, standard deviation and a summary statistic. b) State the meaning of the value of your standard deviation obtained from (a) above. c) Plot stem-and-leaf, dot plot, box plot and histogram. d) Describe the shape of the histogram and state whether the mean is a good measure or not. State a reason for your choice.
Transcribed Image Text:A semiconductor manufacturer produces devices used as central processing units in personal computers. The speed of the devices (in megahertz) is important because it determines the price that the manufacturer can charge for the devices. The following table contains measurements on 120 devices. 680 669 719 699 670 710 677 669 700 718 690 681 702 696 692 649 675 701 721 683 735 688 763 672 681 722 663 658 634 720 690 679 691 683 705 746 706 649 668 717 727 683 652 720 660 695 701 724 668 698 668 660 653 637 660 693 679 682 704 652 664 702 661 720 695 670 656 723 710 680 684 705 681 662 644 683 695 678 674 724 748 697 690 656 667 683 698 672 642 694 660 659 704 690 724 680 739 704 695 718 660 648 703 660 722 691 680 685 681 715 665 676 665 675 655 659 720 675 697 663 This data set: Homework4, has been uploaded with our Homework#4 folder, download and read this data to R studio and use it to answer the following questions. a) Calculate the following using R, mean, median, standard deviation and a summary statistic. b) State the meaning of the value of your standard deviation obtained from (a) above. c) Plot stem-and-leaf, dot plot, box plot and histogram. d) Describe the shape of the histogram and state whether the mean is a good measure or not. State a reason for your choice.
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