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Hello everyone.
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So in this question we have given, average sales at a fast food restaurant is equal to $7 ,400 per day.
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Now, after advertising, a sample of 64 days of sales were taken and they found the average daily sales were $7 ,600 per day.
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And the population deviation is equal to $1 ,000.
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Now, we need to find the value of test statistic.
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So from the above information, we have given that x bar is equal to 7 ,600 mu, that is mean is equal to 7 ,400, standard deviation that is sigma is equal to 1 ,000, and sample size, that is n is equal to 64.
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And we know that the formula for finding the test statistic, test statistic, that is z is equal to x bar minus mu divided by sigma divided by square root n.
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Now we need to put all the values in this formula...