Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) = 16.0; = 3.8 P(10 x 26) = ____ Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) = 5.8; = 1.6 P(7 x 9) = _____ Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) = 100; = 13 P(x 120) = 1______ Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) = 2.6; = 0.38 P(x 2) = _____ Find z such that 4.1% of the standard normal curve lies to the left of z. (Round your answer to two decimal places.) z = ______ Sketch the area described Loading... Find z such that 3.3% of the standard normal curve lies to the right of z. (Round your answer to two decimal places.) z = _____ Sketch the area described Find the z value such that 69% of the standard normal curve lies between z and z. (Round your answer to two decimal places.) z = ____ Sketch the area described. Loading... Porphyrin is a pigment in blood protoplasm and other body fluids that is significant in body energy and storage. Let x be a random variable that represents the number of milligrams of porphyrin per deciliter of blood. In healthy circles, x is approximately normally distributed with mean = 39 and standard deviation = 15. Find the following probabilities. (Round your answers to four decimal places.) (a) x is less than 60 (b) x is greater than 16 (c) x is between 16 and 60 (d) x is more than 60 (This may indicate an infection, anemia, or another type of illness.) Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Quick Start battery is normally distributed, with a mean of 46.0 months and a standard deviation of 9.1 months. (a) If Quick Start guarantees a full refund on any battery that fails within the 36-month period after purchase, what percentage of its batteries will the company expect to replace? (Round your answer to two decimal places.) _____% (b) If Quick Start does not want to make refunds for more than 10% of its batteries under the full-refund guarantee policy, for how long should the company guarantee the batteries (to the nearest month)? ______months What percentage of the area under the normal curve lies as given below? (a) to the right of ______ % (b) between 2 and + 2 ______ % (c) to the right of + 3 (Use 2 decimal places.) _______ % Look at the normal curve below, and find , + , and . = _____ + =______ = ________ Assuming that the heights of college women are normally distributed with mean 69 inches and standard deviation 3.3 inches, answer the following questions. (Hint: Use the figure below with mean and standard deviation .) (a) What percentage of women are taller than 69 inches? ______ % (b) What percentage of women are shorter than 69 inches? _______ % (c) What percentage of women are between 65.7 inches and 72.3 inches? _______ % (d) What percentage of women are between 62.4 and 75.6 inches? _______ % The incubation time for Rhode Island Red chicks is normally distributed with a mean of 24 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions. If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods? (Note: In this problem, let us agree to think of a single day or a succession of days as a continuous interval of time. Assume all eggs eventually hatch.) a) in 20 to 28 days _______ chicks (b) in 22 to 26 days ________ chicks (c) in 24 days or fewer _______chicks (d) in 18 to 30 days _______ chicks Does a raw score less than the mean correspond to a positive or negative standard score? What about a raw score greater than the mean? Raw scores below and above the mean will have positive standard scores Raw scores less than the mean will have negative standard scores; raw scores above the mean will have positive standard scores. Raw scores below and above the mean will have negative standard scores. Raw scores less than the mean will have positive standard scores; raw scores above the mean will have negative standard scores. Do not know if this is correct answer I accidentally pushed it What are the values of the mean and standard deviation of a standard normal distribution? = ______ = _______ Raul received a score of 76 on a history test for which the class mean was 70 with a standard deviation of 8. He received a score of 71 on a biology test for which the class mean was 70 with standard deviation 6. On which test did he do better relative to the rest of the class? () biology test () history test () the same The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below. Robert, 1.19 Juan, 1.75 Susan, 1.82 Joel, 0.00 Jan, 0.85 Linda, 1.54 (a) Which of these students scored above the mean? (circle all that apply.) Jan Joel Juan Linda Robert Susan (b) Which of these students scored on the mean? (circle all that apply.) Jan Joel Juan Linda Robert Susan (c) Which of these students scored below the mean? (circle all that apply.) Jan Joel Juan Linda Robert Susan Loading... (d) If the mean score was = 146 with standard deviation = 19, what was the final exam score for each student? (Round your answers to the nearest whole number.) Robert ______Joel ______Jan_____ Susan_____Linda_____ Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the left of z = 0 is 1 _______. Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the left of z = 0.44 is _______ Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the left of z = 0.77 is _______ . Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the right of z = 0.23 is _____ Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the right of z = 2.23 Is_______. Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area between z = 0 and z = 1.80 is _______ Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area between z = 1.42 and z = 1.99 is ______ . Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area between z = 1.43 and z = 2.13 is_______. Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.) P(z 1.84) = ________ Shade the corresponding area under the standard normal curve. Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.) P(z 2.69) = _______ Shade the corresponding area under the standard normal curve Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.) P(z 2.12) = ______ Shade the corresponding area under the standard normal curve Let z be a random variable with a standard normal distribution. Find the indicated probability. (Enter your answer to four decimal places.) P(2.01 z 1.10) = _______ Shade the corresponding area under the standard normal curve. Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal places.) P(1.88 z 1.28) = __________ Shade the corresponding area under the standard normal curve.

None of the bell curves turned out on this form. If possible can you show me how the problems are worked