Mathematics, 12.05.2021 04:50, abbz13

A tool company claims that the mean number of defective screws they produce per box is 72. The mean number of defective screws in 100 randomly chosen boxes was found to be 76, with a standard deviation of 19. Test this hypothesis. Fail to reject the null hypothesis. There is not enough evidence to oppose the tool company's claim.
Fail to reject the null hypothesis. There is enough evidence to oppose the tool company's claim.
Reject the null hypothesis. There is enough evidence to oppose the tool company's claim.
Reject the null hypothesis. There is not enough evidence to oppose the tool company's claim.

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A tool company claims that the mean number of defective screws they produce per box is 72. The mean...