You are given: i. ii. (t) = 0.03, t > 0 iii. iv. g is the standard deviation of a A 8 = 0.05 Calculate Pr ( B T, is the future lifetime random variable. Possible Answers D 0.53 0.56 0.63 0.68 0.79 T,\ ār az - 9).

At a large publishing company, the mean age of proofreaders is  36.2  years and the standard deviation is  3.7  years. Assume the variable is normally distributed. Round intermediate  z -value calculations to two decimal places and the final answers to at least four decimal places. Part: 0 / 2 0 of 2 Parts Complete   Part 1 of 2     If a proofreader from the company is randomly selected, find the probability that his or her age will be between  36.5  and  38  years. P(36.5<X<38)=

+ I/ * 00 A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 997 hours. This average is maintained by periodically testing random samples of 16 light bulbs. If the t-value falls between -th an and t, go then the company will be satisfied that it is manufacturing acceptable light bulbs. For a random sample, the mean life span of the sample is 1002 hours and the standard deviation is 29 hours. Assume that life spans are approximately normally distributed. Is the company making acceptable light bulbs? Explain. and to 90 The company making acceptable light bulbs because the t-value for the sample is t= (Round to two decimal places as needed.) Get more help- Clear all Check answer 3:44 PM 64°F Sunny A 11/23/2021 PrtSc F5. F10 F11 F12 4. 5. 9. 6. K. B. M.

H0:μ=52.9H0:μ=52.9H1:μ<52.9H1:μ<52.9Your sample consists of 49 subjects, with a mean of 52.7 and standard deviation of 2.44.Calculate the test statistic, rounded to 2 decimal places. t=t=

Assume that females have pulse rates that are normally distributed with a mean of μ=74.0 beats per minute and a standard deviation of σ=12.5 beats per minute. Complete parts​ (a) through​ (c) below.       Question content area bottom Part 1 a. If 1 adult female is randomly​ selected, find the probability that her pulse rate is between 67 beats per minute and 81 beats per minute.   The probability is 0.42450.4245. ​(Round to four decimal places as​ needed.) Part 2 b. If 4 adult females are randomly​ selected, find the probability that they have pulse rates with a mean between 67 beats per minute and 81 beats per minute.   The probability is enter your response here. ​(Round to four decimal places as​ needed.)