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State the null hypothesis as a complete sentence

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Reference no: EM131928023

A well-known brokerage firm executive claimed that at least 90% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800 people, 88% of them said they are confident of meeting their goals.

For this claim state the null and alternative hypothesis as an expression:

State the null hypothesis as a complete sentence:

State the alternative hypothesis as a complete sentence:

How could we re-write the claim to make this a two-tail test?

Reference no: EM131928023

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