When constructing a confidence interval for a population mean, the population standard deviation o was 8. The obtained interval was 48.93 + 3.68. If o equals 16, the confidence interval will be: O 48.93 + 7.36 O 97.86 + 7.36 O 48.93 + 11.68 O 97.86 + 3.68 O 48.93 + 1.84The best approximation for the lower limit of a confidence interval at the 95% level of confidence for the population proportion if a sample of size 100 had 70 successes is approximately: O 0.3661 O 0.4578 O 0.7322 O 0.6540 O 0.6102A recent survey indicates that the proportion of season ticket holders for the school hockey team who renew their seats is about 0.65. Using a 98% confidence interval and a margin of error of 0.03, what is the approximate size of the sample needed to estimate the true proportion who plan to renew their seats? O 313 O 1683 O 892 O 1373 O None of these