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A Computer Store Offers Used Computers Free to Local Middle

question 34

Multiple Choice

A computer store offers used computers free to local middle schools. Of the 55 machines available, 15 have defective memories, 12 have defective keys, and the remainder have no defects. If a teacher picks one at random, what is the probability that she will select a defective computer?

Comprehend the establishment and contributions of Republican governments in the South during Reconstruction.

Acknowledge the significance of the civil rights movements labeled as the "Second Reconstruction."

Grasp the long-term debates and consequences instigated by Reconstruction policies.

Understand the social and political roles of African-Americans and women during and after the Reconstruction era.

Definitions:

Standard Deviation

A statistical measure of the dispersion or variability of a set of data points, indicating how spread out the data points are from the mean.

Confidence Interval

A set of numbers, based on statistics from a sample, that has a high probability of including the value of a not-yet-known parameter of the population, considering a certain level of confidence.

Waiting Time

The duration of time until a specific event occurs.

Sample Mean

The average value of a sample set of numbers, calculated by adding all the values together and dividing by the number of values.