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For a Variable with = 3

question 37

Multiple Choice

For a variable with For a variable with = 3.50, how large should the sample be for a desired 95% confidence interval width of 1.50? A) 9 B) 21 C) 84 D) 441 = 3.50, how large should the sample be for a desired 95% confidence interval width of 1.50?

Definitions:

Error

The difference between the observed value and the true value in statistics and scientific measurements.

Null Hypothesis

A statement used in hypothesis testing that indicates no significant difference or effect.

P-value

The probability of observing a statistic at least as extreme as the one observed, given that the null hypothesis is true.

Level of Significance

A threshold in hypothesis testing that determines the probability of rejecting a true null hypothesis, often denoted by alpha.