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The mean height of all the elderly women in a city is cm and the variance of their heights

 
 

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1.A survey of 47 people was conducted to compare their self-reported height to their actual height. The difference between reported ...

e difference between reported height and actual height was calculated. You're testing the claim that the mean difference is greater than 0.6. From the sample, the mean difference was 0.7, with a standard deviation of 0.74. Calculate the test statistic, rounded to two decimal places Incorrect
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2.The mean height of all the elderly women in a city is 160 cm and the variance of their heights ...

cm2. If a sample of 60 elderly women is taken, what is the probability that their mean height will be less than 158 cm?
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3.The height of women ages​ 20-29 is normally​ distributed, with a mean of 64.5 inches. Assume standard dev is 2.4 ...

ndard dev is 2.4 inches. Are you more likely to randomly select 1 woman with a height less than 65 inches or are you more likely to select a sample of women with a mean height less than 65 ​inches? Explain.
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4.Suppose the heights of 18-year-old men are approximately normally distributed, with mean 65 inches and standard deviation 6 inches. A button ...

nd standard deviation 6 inches. A button hyperlink to the SALT program that reads: Use SALT. (a) What is the probability that an 18-year-old man selected at random is between 64 and 66 inches tall? (Round your answer to four decimal places.) Correct: Your answer is correct. (b) If a random sample of seven 18-year-old men is selected, what is the probability that the mean height x is between 64 and 66 inches? (Round your answer to four decimal places.) Incorrect: Your answer is incorrect. (c) Compare your answers to parts (a) and (b). Is the probability in part (b) much higher? Why would you expect this? The probability in part (b) is much higher because the standard deviation is smaller for the x distribution. The probability in part (b) is much higher because the standard deviation is larger for the x distribution. The probability in part (b) is much higher because the mean is smaller for the x distribution. The probability in part (b) is much higher because the mean is larger for the x distribution. The probability in part (b) is much lower because the standard deviation is smaller for the x distribution.
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5.2. If the mean of the numbers 9, 10, 11, 12, and x is 12, what is the value ...

s of a sports drink contains 130 milligrams of sodium, what is the total number of milligrams of sodium in 20 ounces of the sports drink? 5. If (k, 3) is a point on the line whose equation is 4x + y = -9, what is the value of k? 9. A flagpole casts a shadow 200 feet long. At the same time, a boy standing nearby who is 5 feet tall casts a shadow 20 feet long. Find the number of feet in the height of the flagpole. 22. What is the greatest value of c for which the roots of the equation x^2 + 4x + c = 0 are real? 24. Find the two acute angles in the right triangle whose sides have the given lengths. Express your answers using degree measure rounded to two decimal places. 7, 24 and 25 A._________________ (smaller value) B._________________ (larger value)
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6. 1. What is the greatest value of c for which the roots of the equation x^2 + 4x + ...

2. Find the two acute angles in the right triangle whose sides have the given lengths. Express your answers using degree measure rounded to two decimal places. A._______________________ (Smaller Value) B. _______________________ (Larger Value) 3. A flagpole casts a shadow 200 feet long. At the same time, a boy standing nearby who is 5 feet tall casts a shadow 20 feet long. Find the number of feet in the height of the flagpole. 4. If (k, 3) is a point on the line whose equation is 4x + y = -9, what is the value of k? 5. If 8 ounces of a sports drink contains 130 milligrams of sodium, what is the total number of milligrams of sodium in 20 ounces of the sports drink? 6. If the mean of the numbers 9, 10, 11, 12, and x is 12, what is the value of x?
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1.AU MAT 120 Systems of Linear Equations and Inequalities Discussion

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