The Sugar Producers Association Wants to Estimate the Mean Yearly

question 17

Multiple Choice

The Sugar Producers Association wants to estimate the mean yearly sugar consumption. A sample of 25 people reveals the mean yearly consumption to be 27 kg with a sample standard deviation of 9 kg. Assume a normal population. For a 90% confidence interval, what is the critical value needed?

• A) t = 1.708
• B) t = 1.711
• C) t = 2.797
• D) z = 1.645
• E) z = 1.96

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