Construct a confidence interval of the population proportion at the given level of confidence.   x=860​, n=1100​, 96​% confidence   Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2).   The lower bound of the confidence interval is   The upper bound of the confience interval is

The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inches

e Levels Noise levels at various area urban hospitals were measured in decibels. The mean noise level in  165  ward areas was  59.2  decibels, and the population standard deviation is  4.2 . Find the  94%  confidence interval of the true mean. Use a graphing calculator and round the answers to one decimal place.

Use the normal distribution of IQ scores , which has a mean of 90 and a standard deviation of 14, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. view the table: Standard Scores and Percentiles for a Normal Distribution (cumulative values from the left) Full data set     Open in StatCrunch   +   Copy to Clipboard   +   Open in Excel   + Standard score ​% Standard score ​% minus−3.0 0.13 0.1 53.98 minus−2.5 0.62 0.5 69.15 minus−2 2.28 0.9 81.59 minus−1.5 6.68 1 84.13 minus−1 15.87 1.5 93.32 minus−0.9 18.41 2 97.72 minus−0.5 30.85 2.5 99.38 minus−0.1 46.02 3 99.87 0 50.00 3.5 99.98 The percentage of scores between 62 and 118 is ________%.  Round to two decimal places as needed.