As part of an evaluation program, a sporting goods retailer wanted to compare the downhill coasting speeds of four brands of bicycles. She recorded three trials of each brand and determined their maximum downhill speeds. The results are presented in kilometres per hour in the table below. Trial Barth Tornado Reiser 43 37 46 38 43 39 1 2 3 41 45 42 Shaw 43 45 46 Referring to the information above, the within group variation or SSW is Answer to 2 d.p.

The two data sets are dependent. Findd to the nearest tenth. X| 11.2 11.3 11.6 12.9 10.6 5) Y 11.1 12.6 12.9 10.7 13.3 A) -0.6 5) B) -0.8 C) -0.4 D) -0.7 1

Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of μ = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 40 waves showed an average wave height of x = 16.9 feet. Previous studies of severe storms indicate that σ = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. (a) What is the level of significance?   State the null and alternate hypotheses. H0: μ < 16.4 ft; H1: μ = 16.4 ft H0: μ > 16.4 ft; H1: μ = 16.4 ft     H0: μ = 16.4 ft; H1: μ < 16.4 ft H0: μ = 16.4 ft; H1: μ ≠ 16.4 ft H0: μ = 16.4 ft; H1: μ >…

A semiconductor manufacturer produces devices used as central processing units in personal computers. The speed of two model devices, measured in megahertz, is important because it determines the price that the manufacturer can charge for the devices. The following data presents the measurement on 20 devices each for the two models. Model A: 680 670 710 669 669 719 699 722 663 658 634 720 690 677 700 718 690 681 702 Model B: 652 720 660 695 701 724 668 698 668 660 680 739 717 727 653 637 660 693 679 a. Which of the two models is relatively faster? What is your basis for stating such? b. If you were to choose which between the two models you are going to use as central processing unit in a personal computer, which would it be and why? Support your answer statistically.

Please answer the following question: Is there any relationship between the type ofmalaria and the tropical zone of contagious?

10. The distance that a cyclist rides each day is what sort of data: a. Discrete b. Continuous

During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. Frequency 12+ 298 ans = 10- a 2 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 # items over 10 What is the frequency of times the limit was exceeded by at least 3 items?

c. Complete the analysis (be sure to include graphs as appropriate to the test). Show me calculations and results from excel.  d. What is the interpretation of your results?

Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of u- 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm dass rating. Peak wave heights are usually measured from land (using binoculars) off foxed cement piers. Suppose that a reading of 36 waves showed an average wave height of x- 16.9 feet. Previous studies of severe storms indicate that - 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use a - 0.01. (a) What is the level of significance? O State the null and alternate hypotheses. O H: - 16.4 ft; H,: > 16.4 ft O Ho H 16.4 t; H,: - 16.4 m (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. O The standard…

ve 7:16. Calculate Bowley's coefficient of skewness from the following data: 75 100 125 150 175 200 225 250 Mid-value 35 40 48 100 125 80 50 22 Frequency