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A report said that the average blood pressure is 131.61 for a sample of 42 white males aged 35-44 in Canada. The sample standard deviation of systolic blood pressure is 5.66. Find the 92% confidence interval for the mean blood pressure for white males aged 35-44 in Canada. O (130.142, 133.278) (130.081, 133.139) (130.181, 133.239) O (130.042, 133.178) A confidence interval was constructed to approximate a population proportion. The interval was from 24.5% to 40.5%. The sample proportion that was used to construct this interval was 33.5%. O False O True A confidence interval for a mean is (-11, 21). This interval would be wider if The investigator wanted to be more confident of their results, or there was more O information. O The sample mean was larger or the variability of the data was larger. The variability of the data was larger, or the investigator wanted to be more confident. O The variability of the data was small, or the sample mean was larger. O None of the above. 15 squirrels were found to have an average weight of 270 grams with a sample standard deviation of 4.35. Find the 95% confidence interval of the true mean weight (assume the t-student distribution). O (267.59, 272.41) O (269.38, 271.63) O (255.11, 271.63) O (240.83, 270.84)