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

question 40

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 mean age was 19.1 years,with a sample standard deviation of 1.5 years. What is the 95% confidence interval for the population mean?

• A)[0.97,3.27]
• B)[15.64,22.56]
• C)[17.97,20.23]
• D)[17.95,20.25]

Understand the fundamentals of inductance and inductive reactance.

Identify and understand the units and symbols related to inductors and inductive circuits.

Calculate inductive reactance given frequency and inductance.

Calculate the total inductive reactance for series and parallel configurations.

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Definitions:

Sample Size

The number of observations or units chosen from a population for the purpose of statistical analysis.

Lowering Alpha

Reducing the alpha level, or the threshold of significance, to decrease the probability of committing a type I error in hypothesis testing.

Type I Error

A statistical error occurring when a true null hypothesis is incorrectly rejected.

Type II Error

The error that occurs when a false null hypothesis is not rejected, meaning a true effect is missed.