Question

# In your bid to be elected class representative, you have your election committee survey five randomly...

In your bid to be elected class representative, you have your election committee survey five randomly chosen students in your class and ask them to rank you on a scale of 0-10. Your rankings are 9, 6, 8, 8, 4. (a) Find the sample mean and standard deviation. (Round your answers to two decimal places.) HINT [See Example 1.] sample mean standard deviation (b) Assuming the sample mean and standard deviation are indicative of the class as a whole, in what range does the empirical rule predict that approximately 68% of the class will rank you? , What other assumptions must we make to use the rule? The population distribution is neither bell-shaped nor symmetric. The population distribution is symmetric, but not bell-shaped. The population distribution is bell-shaped, but not symmetric. The population distribution is bell-shaped and symmetric.

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