1. Given the problem: "Lim Electronics claims that the new brand of cellular phone will last for 80,000 hours. A research company conducted a test on the information. The company randomly select and test 100 cellular phone. The data from the sample shows that the mean life of the cellular phone is 60,000 hours, with a standard deviation of 1500 hours. Determine the 95% confidence interval of the mean life of the cellular phone." what does the answer tells about?

Select one:

a. Lim Electronics can use the survey conducted for their advertisements.

b. The confidence interval support the claim of Lim Electronics.

c. The confidence interval does not support the claim of Lim Electronics.

d. The information is not sufficient to conclude.

2. Suppose a new cancer treatment is given to a sample of 500 patients. The treatment was successful for 300 of the patients. Assume that these patients are representative of the population of individuals who have this cancer. Determine a 90% confidence interval for the proportion successful treated.

Select one:

a. 0.564 < p < 0.640

b. 0.834 < p < 0.927

c. 0.742 < p < 0.834

d. 0.640 < p < 0.742

3. Suppose a new cancer treatment is given to a sample of 500 patients. The treatment was successful for 300 of the patients. Assume that these patients are representative of the population of individuals who have this cancer. Calculate the sample proportion that was successfully treated.

Select one:

a. 0.72

b. 0.30

c. 0.60

d. 0.85