A herbal tea company markets three different tea products, namely Mental Boost, Physical Power and Skin Remedy. The breakdown of the percentage contribution of each product to total sales (in units sold) in 2020 is as follows: •Mental Boost, 29% •Physical Power, 28% •Skin Remedy, 25% After a one-week Instaface marketing campaign, during which international celebrity Slim Harbashian posted numerous photos of herself drinking the Skin Remedy tea, a sample of 300 sales was analysed. The breakdown of the number of each type of tea sold is as follows: •Mental Boost, 95 units sold ●Physical Power, 70 units sold •Skin Remedy, 89 units sold •Other products, 46 units sold Use a=0.05 for all calculations in questions that follow. What is the critical value that should be used for this test? a. 9.348 b. 9.488 C. 7.815 O d. 7.779

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