1. PUTTING IT ALL TOGETHER

2. The situation A manufacturer of a type of cell-phone claims their phones are extremely reliable, with 95% of them working correctly. You are the head of Verizon and you only want to offer a phone if it has a minimum reliability of 95%.

3. Basics  A manufacturer of a type of cell-phone claims their phones are extremely reliable, with 95% of them working correctly. You are the head of Verizon and you only want to offer a phone if it has a minimum reliability of 95%. What is the population? What is your parameter?

4. Null and Alternative Hypothesis  A manufacturer of a type of cell-phone claims their phones are extremely reliable, with 95% of them working correctly. You are the head of Verizon and you only want to offer a phone if it has a minimum reliability of 95%. What is your Null hypothesis and alternative hypothesis?

5. Confidence interval  A manufacturer of a type of cell-phone claims their phones are extremely reliable, with 95% of them working correctly. You are the head of Verizon and you only want to offer a phone if it has a minimum reliability of 95%. You take a sample of 15 of this type of phone and find that an average of 92% work correctly. Your sample standard deviation is 3.05. Create a 95% confidence interval for the population parameter.

6. Hypothesis Test  A manufacturer of a type of cell-phone claims their phones are extremely reliable, with 95% of them working correctly. You are the head of Verizon and you only want to offer a phone if it has a minimum reliability of 95%. You take a sample of 15 of this type of phone and find that an average of 92% work correctly. Your sample standard deviation is 3.05.

7. Conclusion  Are you going to offer this type of cell-phone to Verizon customers?