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    Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts Read More

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    Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts Read More

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    Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts Read More

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    Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts Read More

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    Slide # 5

    Far far away, behind the word mountains, far from the countries Vokalia and Consonantia, there live the blind texts Read More

     
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  • Chapter 10 Soal ANOVA

    10.65

    The data below represent the lifetime of four different alloys.

                                                           Alloy

    1 2 3 4
    999 1022 1026 974
    1010 973 1008 1015
    995 1023 1005 1009
    998 1023 1007 1011
    1001 996 981 995

     

    1. At the 0.05 level of significance, is there evidence of a difference in the mean lifetime of the four alloys?
    2. If appropriate, determine which alloys differ in mean lifetime.
    3. At the 0.05 level of significance, is there evidence of a difference in the variation in lifetime among the four alloys?
    4. What effect does your result in (c) have on the validity of the results in (a) and (b

    10.67

    The retailing manager of a supermarket chain wants to determine whether product location has any effect on the sale of pet toys. Three different aisle locations are considered: front, middle, and rear. A random sample of 18 stores is selected wit 6 stores randomly assigned to each aisle location. The size of the display area and price of the product are constant for all stores. At the end of a 1-month trial period, the sales volumes (in thousands of dollars) of the product in each store were as follows:

    FRONT MIDDLE REAR
    8.6 3.2 4.6
    7.2 2.4 6.0
    5.4 2.0 4.0
    6.2 1.4 2.8
    5.0 1.8 2.2
    4.0 1.6 2.8

    At the 0.05 level of significance, is there evidence of a significant difference in mean sales among the various aisle locations?

    1. If appropriate, which aisle locations appear to differ significantly in mean sales?
    2. At the 0.05 level of significance, is there evidence of a significant difference in the variation in sales among the various aisle locations?
    3. What should the retailing manager conclude? Fully describe the retailing manager’s options wit respect to aisle locations.

     

     

     

     

     

     

     

     

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