Question 21 4 pts The lifetime of carbon cutting tool is normally distributed with mean lifetime...
Question 3 20 pts For the HP-162 printer cartridge, the lifetime (in pages printed) are normally distributed with a mean of 657.2 and a standard deviation of 38.4. If 17 cartridges are randomly selected, what is the probability that their mean lifetime is between 650 and 670 pages? 0.3044 O 0.2049 0.6956 0.7591 Question 4 20 pts A final exam in MTH 160 has a mean of 73.0 with standard deviation 7.8. If 45 students are randomly selected from MTH...
Question 17 1 pts Provide an appropriate response. Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 126. O 0.9998 O 0.8615 O 0.9938 0.0062
Question 6 9 pts The lengths of all pregnancies are normally distributed with a mean of 273 days and a standard deviation of 20 days. If 64 women are randomly selected, find the probability that they have a mean pregnancy between 270.5 days and 275.5 days. Question 7 9 pts The distribution of body temperatures of all adults has a mean of 98.6°F and a standard deviation of 0.60° F. If a sample of 49 adults are randomly selected, find...
The width of a tool used for semiconductor manufacturing is assumed to be normally distributed with a mean of 0.5 micron and a standard deviation of 0.05 micron. What is the probability that a randomly selected tool will have a width between 0.47 and 0.63 microns? What is a specific width value so that 90% of the tools are below that value?
Assume that blood pressure readings are normally distributed with a mean of 122 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 124. T O A. 0.0062 OB. 0.9938 OC. 0.8819 O D. 0.8615 TART HERE EBBEACH BOLSAS DRESS SES THE DARI ER
QUESTION 10 Provide an appropriate response. Assume that blood pressure readings are normally distributed with a mean of 124 and a standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be less than 126. 0.8615 0.9998 0.9938 0.0062
Question 11 A manufacturer knows that their items have a normally distributed length, with a mean of 15.6 inches, and standard deviation of 4.7 inches. If 23 items are chosen at random, what is the probability that their mean length is less than 18.1 inches? Pa < 18.1) = Submit Question Question 12 BO A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.3 years, and standard deviation of 2.7 years. If you randomly...
The lifetime of a certain brand of tires is normally distributed. The average lifetime of a tire is 50,000 miles with a lifetime standard deviation of 8,400 miles. The probability that a randomly selected tire will last less than 45,000 miles is Tables Keypad 10 Points Answer 0.2758 0.0000 0.7242 0.2257 The resting heart rate (bpm) for a given conditioned athlete is a uniformly distributed random variable ranging between 40 and 60 bpm (beats per minute). What is the probability...
Question 4
Assume that females have pulse rates that are normally distributed with a mean of u = 74.0 beats per minute and a standard deviation of o = 12.5 beats per minute. Complete parts (a) through (c) below. a. If 1 adult female is randomly selected, find the probability that her pulse rate is less than 77 beats per minute. The probability is (Round to four decimal places as needed.)
The lifetime of a battery in a certain application is normally distributed with mean = 16 hours and standard deviation o = 2 hours. a) What is the probability that a battery will last more than 19 hours? Select] b) Find the 10th percentile of the lifetimes. (Select] c) A particular battery lasts 14.5 hours. What percentile is its lifetime on? Select)