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Statistics. (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.) x1 = s1 = x2 = s2 = (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 99% confidence interval for μ1 − μ2. (a) Use a calculator with mean and standard ...
Math. Statistics. The weights of a certain dog breed are approximately normally distributed with a mean of 51 pounds, and a standard deviation of 5.6 pounds. Use your graphing calculator to answer the following questions. Write your answers in percent form. Round your answers to the nearest tenth of a percent.
A variable is normally distributed with mean 21 and standard deviation 7. Use your graphing calculator to find each of the following areas. Write your answers in decimal form. Round to the nearest thousandth as needed. a) Find the area to the left of 20. b) Find the area to the left of 17. c) Find the area to the right of 18.
Based on the following calculator output, determine the population standard deviation of the dataset, rounding to the nearest 100th if necessary. 1-Var-Stats 246.571428571 Σα1726 = 429622 Sx 25.947749696 ox = 24.0229482124 n = 7 minX 221 Q1 = 231 Med = 239 Qз — 256 = maxX = 299
Statistics. (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.) x1 = % s1 = % x2 = % s2 = % (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 99% confidence interval for μ1 − μ2. (Round your answers to two decimal ...
Math. Statistics. (a) Use a calculator with mean and sample standard deviation keys to find the sample mean reading and the sample standard deviation s. (in mg/dl; round your answers to two decimal places.) = mg/dl s = mg/dl (b) Find a 99.9% confidence interval for the population mean of total calcium in this patient's blood. (in mg/dl; round ...
The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour.
Statistics. Big chickens: The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1521 dlo grams and standard deviation 166 grams. Use the TI-84 Plus calculator to answer the following. (a) What proportion of broilers weigh between 1185 and 1283 grams?
Math. Statistics. The standard deviation of the numbers 3, 8, 12, 17 and 25 is 7.56 correct to 2 decimal places. What happens if each of the five numbers is increased by 2? The standard deviation is multiplied by 2. The standard deviation is decreased by 2. The standard deviation is increased by 2. The standard deviation stays the same. The ...
using your calculator find the range and standard deviation, round to 2 decimal places. the table below gives the number of hours spent watching TV last week by a sample of 24 students. 25,45,77,60,46,35,48,41,34,37,83,31,66,27,85,63,25,84,87,93,20,51,46,10. The ages (in years) of a random sample of shoppers at a gaming store are shown.