Answer all 8

Question 2 Question 3 Question 6 0/2 pts 9 3 99 0 Details 0/2 pts 9 3 99 0 Details 0/2 pts 9 3 99 0 Details 199-cm. P(M > 199-cm) = A population of values has a normal distribution with The lengths of pregnancies in a small rural village are A population has parameters u = 110.6 and o = 44. u = 123.3 and o = 85.9. You intend to draw a normally distributed with a mean of 268 days and a You intend to draw a random sample of size n = 134. random sample of size n = 25. standard deviation of 12 days. 0/2 pts 9 3 99 0 Details What is the mean of the distribution of sample means? Find the probability that a single randomly selected In what range would you expect to find the middle 50% shipment, 12 steel rods are bundled together. value is less than 157.7. of most pregnancies? Find the probability that the average length of a scores rounded to 3 decimal places are accepted. 197.5-cm and a standard deviation of 2.3-cm. For steel rods are normally distributed with a mean of places. Answers obtained using exact z-scores or z- A company produces steel rods. The lengths of the Enter your answer as a number accurate to 4 decimal randomly selected bundle of steel rods is greater than Hi = P(X C0/2 pts 9 3 99 0 Details [0/2 pts 9 3 99 0 Details 0/2 pts 9 3 99 0 Details A particular fruit's weights are normally distributed, Engineers must consider the breadths of male heads A manufacturer knows that their items have a lengths when designing helmets. The company researchers with a mean of 796 grams and a standard deviation of 31 grams. that are skewed right, with a mean of 12.5 inches, and have determined that the population of potential clientele have head breadths that are normally standard deviation of 2.6 inches. Let X represent the full length of a certain species of distributed with a mean of 6.5-in and a standard newt. Assume that X has a normal probability If you pick 6 fruits at random, then 14% of the time, deviation of 1.2-in. distribution with mean 140.7 inches and standard If 32 items are chosen at random, what is the deviation 7 inches. their mean weight will be greater than how many In what range would you expect to find the middle 68% grams? probability that their mean length is greater than 12.1 You intend to measure a random sample of n = 115 of most head breadths? inches? newts. The bell curve below represents the distibution of these sample means. The scale on the horizontal Between and Give your answer to the nearest gram. axis is the standard error of the sampling distribution. (Round answer to four decimal places) Complete the indicated boxes, correct to two decimal If you were to draw samples of size 60 from this places. population, in what range would you expect to find the middle 68% of most averages for the breadths of male heads in the sample? Between and Enter your answers as numbers. Your answers should be