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04. Suppose, total marks for a course of 25 randomly selected IUB students is normally Distributed with mean 78 and SD 9 . Find 90%,

04. Suppose, total marks for a course of 25 randomly selected IUB students is normally Distributed with mean 78 and SD 9 . Find 90%, 95% and 99% confidence intervals for population mean u. Make a summary based on findings

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