THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 99

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
In calculating the 95% confidence interval for μ₁ - μ₂ the difference between the means of two normally distributed populations,the summary statistics from two independent samples are:
n_x = 10,
= 50,
= 0.64,n_y = 10,
= 40,and
= 1.86.
-What is the lower confidence limit of the 95% confidence interval if the Population variances are unknown and are assumed to be equal?

• A)8.880
• B)8.950
• C)9.020
• D)7.650

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Definitions:

Cell body

The part of a neuron that contains the nucleus and most of the cytoplasm and organelles.

Axons

Long, thin fibers that are part of nerve cells (neurons), responsible for transmitting electrical impulses away from the neuron's cell body.

Myelin

A fatty substance that insulates the axon and allows it to send nerve impulses quickly.

Schwann cells

Specialized cells located in the peripheral nervous system, responsible for the formation of myelin sheaths around neurons, facilitating rapid signal transmission.