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A survey on a random sample of 400 full-time employees in Australia gave an average weekly salary of $1530 with a standard deviation of 203.

A survey on a random sample of 400 full-time employees in Australia gave an average weekly salary of $1530 with a standard deviation of 203.

Construct a 95% confidence interval for full-time weekly salary in Australia and write down the lower limit of the interval (up to 3 decimal places).

Hint: the upper limit is 1549.894

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