sAMPLING mETHOD, Basic Statistics

Assignment Help:
A toothpaste company wants to know if its new product increases the length of time in between dentist
visits for its users. The company sets a target of 180 days to determine if its product prevents dentist visits
longer than other toothpastes. A random sample of 49 customers is taken with a mean of 186 days and a
standard deviation of 20. Set up a one-tailed test at 0.01 level.

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