1. Listed below are weights (grams) from a simple random sample of candies and it require a mean of 2.5 g for weights of each candy. Use a 0.10 significance level to test the claim that the candies are manufactured so that their mean weight is 2.5g. 2.5034 2.5828 2.4798 2.3823 2.5264 2.4232 2.5135 2.4870 2.4927 2.5047 a. Ho: ______________________ Ha: ______________________ b. level of significance: ______ test-statistic (t or z test): _______________ tail of distribution: _______________ c. Decision Rule (with bell curve) d. Computation e. Decision f. Conclusion

2. Customer waiting times are studied at the Jefferson Valley Bank. When 25 randomly selected customers enter any one of several waiting lines, their times have a mean of 6.856 minutes and a standard deviation of 3.624min. Test the claim that waiting time is at most 7 minutes at 5% level.

a. Ho: ______________________ Ha: ______________________ b. level of significance: ______ test-statistic (t or z test): _______________ tail of distribution: _______________ c. Decision Rule (with bell curve) d. Computation e. Decision f. Conclusion

3. Sales promotions that are used by manufacturers to entice retailers to carry, feature or push the manufacturer's products are called trade promotions. A survey of 150 manufacturers conducted by a sales and market consulting firm, found that 89% of the manufacturers believe their spending for trade promotions is inefficient. Test if there is enough evidence that no more than half of all manufacturers are dissatisfied with their promotion spending. Use 1% significance level. a. Ho: ______________________ Ha: ______________________ b. level of significance: ______ test-statistic (t or z test): _______________ tail of distribution: _______________ c. Decision Rule (with bell curve) d. Computation e. Decision f. Conclusion

reference link: https://drive.google.com/file/d/1YFfYkvDCMI915ErwddcNqCYupZ7OgR-x/view?usp=sharing