Question

Alesearch anal disputes a trade group's prediction that back to school spending will average $606.40 per family this year. She believes that average back to school spending will significantly differ from this amount. She decides to conduct a test on the basis of a random sample of 30 households with school age children. She calculates the sample mean as $632.85. She also believes that back to school spending is normally distributed with a population standard deviation of $65. State the null and alternative hypotheses. Using the critical value approach, test the hypotheses at the level of significance. Which of the following are the appropriate hypothesis pairs? Multiple Choice Hos 606 40 H: 60640 How 505 40 60540 Hos 63285 H26325 Ho632.85 He6325

Answer 1

claim: The average is siquiticantly differ from $606.40 iell & 606.40. are So The null and alternative Hypother is option o Ho: M=606.no ta: u 7 606.40 Z (63281-606:40 5-M 22=1-1.960, 1.960 2.23 at d=5% (0.05) Significance level, critical Valnes Reject Ho. There is sufficient evidence to support the claim that ut 606.no). Conclusion