A random sample of 5055 adults in the United States includes 751 who do not use the Internet (based on three Pew Research Center polls). Use a 0.05 significance level to test the claim that the percentage of US adults who do not use the Internet is now less than 47%, which was the percentage in the year 2000. If there appears to be a difference, is it dramatic? 1. Bell Curve - labelled Rejection region - Fail to Reject - Critical Values 2. Calculator Justification 3. **Label where your Test Statistic falls on the bell curve 4. Decision.and Conclusion

poll used a sample of 100 randomly selected car owners. Within the​ sample, the mean time of ownership for a single car was 7.18 years with a standard deviation of 3.37 years. Test the claim by the owner of a large dealership that the mean time of ownership for all cars is less than 7.5 years. Use a 0.05 significance level. Find the Z score and P value and if left-tailed or right-tailed. Also to reject or not too.

The average retirement age in America is 66 years old. Do small business owners retire at an older average age? The data below shows the results of a survey of small business owners who have recently retired. Assume that the distribution of the population is normal. 63, 74, 59, 64, 74, 60, 71, 67, 65, 70, 63 What can be concluded at the the � = 0.05 level of significance level of significance? For this study, we should use     The null and alternative hypotheses would be:       �0:                   �1:               The test statistic     =  (please show your answer to 3 decimal places.) The p-value =  (Please show your answer to 4 decimal places.) The p-value is     � Based on this, we should      the null hypothesis. Thus, the final conclusion is that ... The data suggest the populaton mean is significantly older than 66 at � = 0.05, so there is sufficient evidence to conclude that the population mean retirement age for small business owners is older than 66. The data suggest…

Determine the critical value for a right tailed test of a population mean at the a=0.001 level of significance with 15 degrees of fredom.