Q4) A capacity of a battery is normally distributed with a mean of 25.2 Kw-hr and standard deviation of 0.1 Kw-hr, find the probability that a selected battery has a capacity more than 25.11 Kw-hr 0.758 O )0.864 O 0.691 O 0.816 O
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- The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic speed using premium fuel is a normally distributed random variable with a mean of u= 26.75mpg and a standard deviation of o=3.50 mpg. a. What is the standard error of X, the mean from a random sample of 36 full ups by one driver?(Round your answer to 4 decimal places. ) Standard error of X= b. Within what interval would you expect the sample mean to fall, with 99 percent probability? (Round your answers to 4 decimal places.). the interval is from _____to ____tion 15 of 25 Birth weights at a local hospital have a Normal distribution, with a mean of 110 oz and a standard deviation of 15 oz. The proportion of infants with birth weights above 125 oz is: O 0.500. 0.159. O 0.341. 0.841. terms of use contact us help aboutus prvacy poly 452 PM 10/14/2020 真 a 2. prt sc insert 110Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading between -1.967°C and 0.422°C. P(-1.967 Next Question
- A study of college football games shows that the number of holding penalties assed has a mean of 2.2 penalties100 specimens are tested in determining the life cycle of a certain type of crank shaft which is used in a particular brand of car engine. The tests have shown an average life cycle of μ=44 Gc (1 Gc = 1 gigacycles = 109 cycles) and a standard deviation of σ=33x10-1 Gc. 200 hundred thousand cars using that engine have been sold and are on the traffic. After what number of Gigacycles would you expect 7 % of the shafts broken down?The mean incubation time of fertilized chicken eggs kept at 100.5 degrees F in a still-air incubator is 21 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day. Find an interpret the probability that a a sample of 12 selected fertilized chicken egg hatches in less than 20 days. Edit View Insert Format Tools Table BI U 2. 12pt v Paragraph v B I
- Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading greater than -0.727°C. P(Z > - 0.727) Submit Question hpA company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 258.1 cm and a standard deviation of 0.5 cm. For shipment, 14 steel rods are bundled together.Find the probability that the average length of a randomly selected bundle of steel rods is between 257.8 cm and 258.4 cm.P(257.8 cm < x¯ < 258.4 cm) = Enter your answer as a number accurate to 4 decimal places. Answers should be obtained using z-scores correct to two decimal places.GPAS at CCSU are normally distributed with a mean of 2.14 and a standard deviation of 0.52. Find the z-score for a GPA of 2.78.
- Assume that the amounts of weight that male college students gain during their freshman year are normally distributed with a mean of μ = 1.1 kg and a standard deviation of o= 5.6 kg. Complete parts (a) through (c) below. ... a. If 1 male college student is randomly selected, find the probability that he gains between 0 kg and 3 kg during freshman year. The probability is (Round to four decimal places as needed.)A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the bails bounce upward to be 55.4 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between - to 90 and to so. then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.2 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls? Find - to so and to so -o s0 to so O (Round to three decimal places as needed.)The lifespan of a 100-W fluorescent lamp is define to be normally distributed with σ = 30 hrs. A random sample of 15 lamps has a mean life of x = 1000 hours. Construct a 90% lower-confidence bound on the mean life.