Question

Asked Mar 20, 2019

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Step 1

**a.**

**Finding the standard error of the proportion of households spending more than $100 per week on groceries:**

Here, *p *bar be the true population proportion of households spend more than $100 per week on groceries, *n* is the sample size.

The formula for the standard error is,

Step 2

From given information *p* bar = 0.15 and n = 800

Then the standard error is obtained as follows:

Step 3

**b**.

**Finding the probability that the sample proportion will be within ****±****0.02 of the population p...**

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