Use This Information About 10 Shipments of Light Bulbs If 400 Bulbs Are Selected at Random from Each of

question 41

Multiple Choice

Use this information about 10 shipments of light bulbs: $\begin{array}{lcccccccccc}\text { Shipment } & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\\text { \# of defective units } & 0 & 1 & 2 & 0 & 4 & 3 & 2 & 1 & 3 & 4\end{array}$

If 400 bulbs are selected at random from each of 10 shipments and the number of defectives in each shipment is given above,find the appropriate center line.

• A).005
• B).05
• C).0025
• D).01

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Definitions:

T-test

A technique in statistics for comparing the means of two groups to see if they differ in a statistically significant way.

Alpha

Often referred to as the level of significance in hypothesis testing, it represents the threshold at which the null hypothesis is rejected.

T-test

A statistical test used to compare the mean of two groups to see if there is a significant difference between them.

Null Hypothesis

The hypothesis that there is no significant difference between specified populations, any observed difference being due to sampling or experimental error.