A Student Wanted to Construct a 95% Confidence Interval for the Mean

question 52

Multiple Choice

A student wanted to construct a 95% confidence interval for the mean age of students in her statistics class. She randomly selected nine students. Their average age was 19.1 years with a sample standard deviation of 1.5 years. What is the best point estimate for the population mean?

• A)2.1 years
• B)1.5 years
• C)19.1 years
• D)9 years

Understand the distinction between open and closed circulatory systems and the concept of a hemocoel.

Describe the structure and functions of lophophores and their evolutionary significance.

Identify and explain the anatomical adaptations for movement and feeding in annelids.

Discuss the implications of having an anterior brain in protostomes and its evolutionary benefits.

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