Question

Directions: Draw the normal curve and shade the specific region show formulas

A random same of 200 business showed thatb120 of them ban smoking on their premises. Finding a 95% confidence interval for the population portion of all the business ban smoking on their premises

Step 1

**Confidence interval:**

The (1-α) % confidence interval for proportion *p *is given by,

Step 2

**Computing the 95% confidence interval for population proportion:**

It was found that, 120 businesses were ban smoking on their premises out of the 200 businesses. That is, *n=*200 and the sample proportion, *p-*hat* = *0.6 (=120/200). The confidence level is 95%. Therefore, the significance level, α = 0.05 and the *z* value corresponding to α/2 is 1.96. The 95% confidence interval for population proportion is given by:

Step 3

**Plotting the confidence interval on a normal curve:**

The graph of...

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