A variable is normally distributed with mean 21 and standard deviation 6. 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 19.

Find the indicated z-scores shown in the graph. Click to view page 1 of the table. Click to view page 2 of the table. The Z-scores are (Use a comma to separate answers as needed. Round to two decimal places as needed.) 0.0256 Z=? 0 0.0256 Z=? X

Ta Q The lengths (in kilometers) of a random sample of 22 rivers on the South Island of New Zealand that flow to the Pacific Ocean are listed in table below. Lengths of Rivers (in km) 66 93 138 95 64 322 90 161 167 72 56 80 169 64 121 209 98 97 145 140 288 97

Find the value of E, the margin of error, for c = 0.95, n = 15 and s=5.5. O A. 0.787 OB. 3.132 OC. 2.501 O D. 3.046

c. Find the 95th percentile. (Round to three decimal places as needed.)

Use the TI-84 Plus calculator to find the z-score for which the area to its left is 0.59. Round the answer to two decimal places. The Z-score for the given area is $

Use a calculator and evaluate A to the nearest cent. A = $2,000e0.07t for t= 4, 8, and 9 If t= 4, A $ (Do not round until the final answer. Then round to the nearest hundredth.)

The mean weight of a Great Dane is 63.0 kg with a standard deviation of 2.3 kg.  Suppose a researcher randomly samples 61 Great Danes and records the weights of the sampled dogs.  Calculate the standard deviation of the mean, rounded to 2 decimal places

Many colleges assign numerical points to grade as follows: A = 4, B=3, C=2, D=1, and F=0. Calculate the grade point average. Round to two decimal places, as needed. Course Credits Grade English 4 B Speech 2 :D Mathematics History :3 Physics

Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to P34, the 84th percentile. This is the temperature reading separating the bottom 84% from the top 16%. Click to view page 1 of the table. Click to view page 2 of the table. Which graph represents P ? Choose the correct graph below. 84 A. В. OC. D. Ay X The temperature for P84 is approximately (Round to two decimal places as needed.)