THENEXTOUEST?ONSAREBASED ONTHEFOLLOWING?NFORMATION? The manufacturer of a new ch

Question

THENEXTOUEST?ONSAREBASED ONTHEFOLLOWING?NFORMATION? The manufacturer of a new chewing gum claims their patients who chew gum. An independent consumer research firm decides to test dentists indicate that 74.1% of the respondents do actually prefer their gum. that at least 80% of dentists surveyed prefer their type of gum and recomme r their claim. The findings in a sample of 21) 21) Which of the following statements is most accurate? A) Reject the null hypothesis at a 0.10, but not 0.05. B) Reject the null hypothesis at a -o.05. C) Unable to reject the null hypothesis at a s0.10. D) Reject the null hypothesis at a -0.01.

Explanation / Answer

H0 : P ? 0.80 HA : P < 0.80 The value of the test statistic is ?2.086 = ( ? P0) / As the critical value is ?1.96, we reject the null hypothesis at ? = 0.05 and the manufacturer is not right.

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