areas under any normal curve
7:35 Q SGE all & 7:35 Q SGE all & 4. [-/0.5 Points] DETAILS BBUNDERSTAT12 6.3,009.5. 10. [-/1.5 Points] DETAILS BBUNDERSTAT12 6.3,027.5, MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Assume that x has a normal distribution with the spec on and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) Thickness measurements of ancient prehistoric Native American pot shards discovered in a Hopi village are approximately normally distributed, with a mean of 4.8 millimeters (mm) and a standard deviation of 0.9 mm. For a randomly found shard, find the following LOL USE SALT probabilities. (Round your answers to four decimal places) LA USE SALT A = 13.2, (7 - 2.7 P(B s x s 12) - (a) the thickness is less than 30 mm Need Help? Read It Watch it (b) the thickness is more than 7.0 mm (c) the thickness is between 3.0 mm and 7.0 mm 5. [-/0.5 Points] DETAILS BBUNDERSTAT12 6.3.012.5. MY NOTES ASK YOUR TEACHER Need Help? Read It PRACTICE ANOTHER 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.) LOL USE SALT 11. [-/1 Points] DETAILS BBUNDERSTAT12 6.3.029.5 AL - 109, CF - 16 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER P(x 2 120) - Quick Start Company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a Need Help? Read It Quick Start battery is normally distributed, with a mean of 43.8 months and a standard deviation of 7.5 months, LA USE SALT (a) If Quick Start guarantees a full refund on any battery that fails within the 36-month period after purchase, what percentage 6. [-/0.5 Points] DETAILS BBUNDERSTAT12 6.3.014.5. of its batteries will the company expect to replace? (Round your answer to two decimal places.) MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (b) if quick Start does not want to make refunds for more than 12% of its batteries under the full-refund guarantee policy, for how long should the company guarantee the batteries (to the nearest month)? Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your months answer to four decimal places.) Need Help? Read It Watch it LOL USE SALT 4 = 23; 0 = 0.39 P(x 2 2) - Need Help? Read It 12. [-/1 Points] DETAILS BBUNDERSTAT12 6.3.038.5. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The amount of money spent weekly on cleaning, maintenance, and repairs at a large restaurant was observed over a long period of time o be approximately normally distributed, with mean or - $635 and standard deviation cr = $37. 7. [-/0.75 Points] DETAILS BBUNDERSTAT12 6.3.016.5. LA USE SALT MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) If $646 is budgeted for next week, what is the probability that the actual costs will exceed the budgeted amount? (Round Find z such that 3.1% of the standard normal curve lies to the left of z. (Round your answer to two decimal places.) your answer to four decimal places.) LOL USE SALT (b) How much should be budgeted for weekly repairs, cleaning, and maintenance so that the probability that the budgeted amount will be exceeded in a given week is only 0.09? (Round your answer to the nearest dollar.) Sketch the area described. Need Help? Read It 13. [-/1.5 Points] DETAILS BBUNDERSTAT12 6.3.036.MI.S. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Attendance at large exhibition shows in Dermer averages about 790 beingaverages about 7960 people per day, with standard deviation of about 525. Assume that the daily attendance figures follow a normal distribution. (Round your answers to four decimal places.) LOL USE SALT a) What is the probability that the daily attendance will be fewer than 7200 people
