please help provide correct answers! thank you X = 57; sigma = 3 A) 1 B) -3 C) -

Question

please help provide correct answers! thank you

X = 57; sigma = 3 A) 1 B) -3 C) -1 D) 3 X = 30; sigma = 8 A) 3.75 B) -8 C) -3.75 D) 8 Provide an appropriate response. Find the area under the standard normal curve between z = 0 and z = 3. A) 0.4987 B) 0.4641 C) 0.0010 D) 0.9987 Find the area under the standard normal curve between z = 1 and z = 2. A) 0.1359 B) 0.8413 C) 0.5398 D) 0.2139 Find the area under the standard normal curve to the left of z = 1.5. A) 0.5199 B) 0.7612 C) 0.9332 D) 0.0668 Find the area under the standard normal curve between z = -1.5 and z = 2.5. A) 0.9831 B) 0.6312 C) 0.9270 D) 0.7182 Find the area under the standard normal curve to the right of z = -1.25. A) 0.7193 B) 0.5843 C) 0.8944 D) 0.6978 Given a distribution that follows a standard normal curve, what does the graph of the curve do as z increases in the positive direction? A) The graph of the curve approaches an inflection point. B) The graph of the curve approaches 1. C) The graph of the curve approaches zero. D) The graph of the curve eventually intersects the horizontal axis. Use the standard deviation to find P(-2.25

Explanation / Answer

71) A) 0.4987          (from normal tables)

72) A) 0.1359

73) C) 0.9332

74) C) 0.9270

75) C) 0.8944

76) C) The graph of the curve approaches zero

77)    D) 0.4878

78)   B) 0.8822

79)   A) 0.9270

80)   A) 68%

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