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Transcribed Image Text: 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.
Q: 1.Find the mean and standard deviation for the data A: Given: No. of batteries, n=10 Time (x) 397 355 415 395 352 436 327 417 276… Q: sume that the readings on the themometers are normally distributed with a mean of 0" and standard…
The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
(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.
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
(100, 150, 200, 250, 300} O c. 100, 200, 250, 300, 350} O d. {2, 20, 102, 80, 80} Using the rules of standard deviation, if a value is with in data is ♦ standard deviations of the mean it might be considered a new discovery or incredibly rare. standard deviation of the mean then it is 68% likely to occur. If
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
Using your calculator, find the range and standard deviation, round to two decimals places: The table below gives the number of hours spent watching TV last week by a sample of 24 children. 50 21 47 48 52 61 54 70 64 82 28 22 22 45 32 82 48 42 53 61 41 72 91 14 Range %3D Standard Deviation =
(a) Use a calculator with mean and standard deviation keys to find x and s. (Round your answers to four decimal places.) (b) Compute a 90% confidence interval for the population mean u of home run percentages for all professional baseball players. Hint: If you use the Student's t distribution table, be sure to use the closest d.f. that is smaller.