Test of hypothesis, Basic Statistics

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A toothpaste company wants to know if its new products increases the length of time in between dentists visits for its uses. The company sets a target of 180 days to determine if its products prevents dentists visit longer than other toothpastes. A random samples of 49 customers is taken with a mean of 168 days and standard deviation of 20. Set up a one tail test with an Alpha equals to 0.05.

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