Business, 20.06.2020 22:57 kataldaine

Menso is an organisation for people with high Intelligence Quotients (IQs). Menso is investigating the average IQ of primary school students to determine whether its entry requirements should be altered for younger people. A sample of 40 primary school students have been randomly selected from schools throughout the country. The sample mean IQ of those students was calculated as 90. It is known that the population standard deviation of the IQs of all people is 10. It is assumed that this standard deviation will also apply specifically to the IQs of the primary school students. Calculate the upper and lower bounds of the 90% confidence interval for the mean IQ of primary school students. You may find this standard normal table useful. Give your answers to 2 decimal places.

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Menso is an organisation for people with high Intelligence Quotients (IQs). Menso is investigating t...

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