Reference no: EM131398414
1. Referring to the description of the population variance, σ2, devise a method of estimating σ2 based on the frequencies, fx.
2. Referring to Exercise 1, and using the data in Exercise 2, estimate σ, the population standard deviation.
Exercise 1
Referring to the description of the population variance, σ2, devise a method of estimating σ2 based on the frequencies, fx.
Exercise 2
Suppose health inspectors rate sanitation conditions at restaurants on a five point scale, where a 1 indicates poor conditions and a 5 is excellent. Based on a sample of restaurants in a large city, the frequencies are found to be f1 = 5, f2 = 8, f3 = 20, f4 = 32, and f5 = 23. What is the sample size, n? Verify that the sample mean is X‾ = 3.7.
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What is the sample size n
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