help please. The distribution of the scores on a certain exam is N(40,10), which means that the exam scores are Normally distributed with a mean of 40 and standard deviation of 10.a. Sketch the curve and label, on the x-axis, the position of the mean, the mean plus or minus one standard deviation, the mean plus or minus two standard deviations, and the mean plus or minus three standard deviations.b. Find the probability that a randomly selected score will be less than 30. Shade the region under the Normal curve whose area corresponds to this probability.a. Choose the correct graph below.OA.В.Oc.10 303540 4550 70+20 +3010 2030405060 7010 2030504060+20 +30-30-20-0+o-3σ -2σ+o+20 +30-30-20-0+ob. What is the probability that a randomly selected score will be less than 30?Using the Empirical Rule, the probability that a randomly selected score will be less than 30 is about%.(Type an integer or a decimal.) Which graph shows the distribution with the region shaded under the Normal curve whose area corresponds to the probability that a randomly selected score is less than 30?O A.В.С.1020 30 40 503560 70+20 +3010 20-30 -2030 40 5060 7010 3040 45 50 70+0 +20 +30-30-20+o-0+o+20 +30-За -20

Name: help please. The distribution of the scores on a certain exam is N(40,
Uploaded: 2024-03-20T07:07:37.000Z
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Description: help please. The distribution of the scores on a certain exam is N(40,10), which means that the exam scores are Normally distributed with a mean of 40 and standard deviation of 10.a. Sketch the curve and label, on the x-axis, the position of the mean

(a) Sketch the graph and label. The Empirical rule for any normal distribution is given below: The below graph represents the normal curve with the one standard deviation, two standard deviations and three standard deviations either side of the mean with their respective values. Correct option: Option B (b) Obtain the probability that a randomly selected score will be less than 30. The probability that a randomly selected score will be less than 30 is obtained below as follows: From the above graph, the required probability is obtained below as follows: The probability that a randomly selected score will be less than 30 is 16%. Correct option: Option A