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QUESTION:

A manufacturer of a hair dye markets its color as lasting, on average, 200 washes without fading. A consumer group decides to test this claim by assessing the number of times that 30 women can wash their hair without the color fading and finds the average is 203 washes, with a standard deviation of 5.2.

The resulting p-value is 0; thus, the null hypothesis is rejected. The consumer group concludes that the manufacturer’s claim that its hair color lasts, on average, 200 washes is inaccurate.

What type of error is possible in this situation?

ANSWER:

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