quart of milk contains a mean of 27g of butterfat, with a standard deviation of 2 ir the butterfat is nomally distributed, find the probabity that a quart of this brand of milk chosen at random will contain the following. (Round your answers to four deimal places) (a) beteeen 27 and 31 g of butterfat (b) between 24 and 27 o of butterfat 16.432

I need the answer for B and C please

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 137 adult males, the mean pulse rate is 70.2 bpm and the standard deviation is 10.7 bpm. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)

Compute the range and sample standard deviation for strength of the concrete (in psi). 3920, 4070, 3500, 3100, 2930, 3870, 4070, 4010 The range is S= psi. psi (Round to one decimal place as needed.)

Attached here is the question and answers? Scores on a standardized test are normally distributed with a mean of 100 and a standard deviation of 12. An individualʹs test score is found to be 125. Find the z-score corresponding to this value. Group of answer choices -0.48 2.08 0.48 -2.08

Scores on a standardized exam are normally distributed with a mean of 517 and a standard deviation of 60. The figure below shows the distribution of the scores on a standardized exam. Cal- culate the shaded area under the curve. Express your answer in decimal form accurate to at least two decimal places. Answer: 397 457 The Scores on a Standardized Exan

e average American man consumes 9.6 grams of sodium each day. ppose that the sodium consumption of American men is normally stributed with a standard deviation of 0.8 grams. Suppose an American nan is randomly chosen. Let X = the amount of sodium consumed. Round Al numeric answers to 4 decimal places where possible. %3D a. What is the distribution of X? X - N( b. Find the probability that this American man consumes between 9.5 and 10.6 grams of sodium per day. c. The middle 20% of American men consume between what two weights of sodium? Low: High:

A B. The mean blood cholesterol level for all men aged 20 to 34 years is p = 188 mg/dl with a standard devlation of a = 41 mg/dl. We suspect that the mean for cross-country runners is lower. A random sample of 20 cross-country runners yielded a mean level of 172 mg/di. SHOW YOUR FORMULAS AND ALL WORK ON THIS PAGE What is the standard deviation of the mean length X? Standard Deviation 41.0000