1. The management at Leon's Laser Company claims that the mean lifetime of all the lasers the company sells is greater than 7 years. A hypothesis test is conducted at the =0.10=0.10 significance level to test this claim. In a random sample of 15 lasers, the mean lifetime was found to be 7.71 years, with a sample standard deviation of 2.8 years. The sample data appeared to be normally distributed. What is the critical region for this hypothesis test?

• All values of PP greater than 0.10.1
• All values of tt greater than 0.9820.982
• All values of tt greater than 1.3451.345
• All values of zz greater than 1.7611.761
• All values of zz greater than 1.28

2. The weights of CaramelCubes candies are normally distributed with population standard deviation 2.3 grams. In a sample of 23 CaramelCubes, the mean weight was found to be 34.6 grams. A hypothesis test is conducted at the =0.10=0.10 significance level to determine whether the mean weight of all CaramelCubes candies is equal to 34 grams. Find the P-value for this hypothesis test. Round your answer to four decimal places

3. The weights of CaramelCubes candies are normally distributed with population standard deviation 2.3 grams. In a sample of 23 CaramelCubes, the mean weight was found to be 34.6 grams. A hypothesis test is conducted at the =0.10=0.10 significance level to determine whether the mean weight of all CaramelCubes candies is equal to 34 grams. Find the P-value for this hypothesis test. Round your answer to four decimal places

4. Plattronics Corporation claims that fewer than 4% of all the calculators the company makes turn out to be defective. An investigator tests this claim by selecting a random sample of 550 Plattronics calculators. When the calculators in the sample are tested, 17 of them turn out to be defective. Which is the correct set of hypotheses for the investigator's hypothesis test?

• H0:p=0.04H0:p=0.04 and H1:p<0.04H1:p<0.04
• H0:p=1.28H0:p^=1.28 and H1:p1.28H1:p^1.28
• H0:p=0.04H0:p^=0.04 and H1:p<0.04H1:p^<0.04
• H0:p<17H0:p<17 and H1:p17H1:p17
• H0:p0.031H0:p0.031 and H1:p>0.031

5. In a random sample of 350 eight-graders in Fiction County, it was found that 57 were hearing imparied. At the =0.05=0.05 significance level, we want to test the claim that the percentage of eighth-graders in Fiction County who are hearing impaired is greater than the statewide percentage of 12%. Find the P-value for this hypothesis test. Round your answer to four decimal places