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You conduct an experiment on reaction time (the time it takes to push a button in response to a signal). One group is given a simple reaction time task (a light comes on and they push the button.)...

In a small town, from a sample of 100 car commuters, the sample mean time to travel to work daily was found to be 35,8 minutes. Assume that the population standard deviation is 11 minutes and that...

A human capital executive for a mining investments think tank has asked one of his lieutenants to estimate the true mean employment period of gold miners over the past decade. From a random sample...

Investec Investment Banking Corporation, listed on the Johannesburg Stock Exchange (JSE), analysed the value of purchases made on credit cards by a sample of 25 of its credit card clients. The sample...

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