An accountant claims that 15 per cent of bills of ABC Company are inappropriate. To test this claim a random sample of 200 invoices are checked, and 17 are found to be inappropriate. Test, at the 5 per cent significance level, if the accountant's claim is supported by the sample evidence.

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2. An accountant claims that 15 per cent of bills of ABC Company are inappropriate. To test
this claim a random sample of 200 invoices are checked, and 17 are found to be
inappropriate. Test, at the 5 per cent significance level, if the accountant's claim is
supported by the sample evidence.
Transcribed Image Text:2. An accountant claims that 15 per cent of bills of ABC Company are inappropriate. To test this claim a random sample of 200 invoices are checked, and 17 are found to be inappropriate. Test, at the 5 per cent significance level, if the accountant's claim is supported by the sample evidence.
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