Assume that a set of test scores is normally distributed with a mean of 110 and...
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities.
Assume that a set of test scores is normally distributed with a mean of 100 100 and a standard deviation of 15 15. Use the 68-95-99.7 rule to find the following quantities. a. The percentage of scores less than 100 is 50%. (Round to one decimal place as needed.) b. The percentage of scores greater than 115%. ___ (Round to one decimal place as needed.) c. The percentage of scores between 70 and 115%. ___ (Round to one decimal place...
Assume the resting heart rates for a sample of individuals are normally distributed with a mean of 80 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities. a. The relative frequency of rates less than 120 using the 68-95-99.7 rule is what rounded to three decimals?
A test of depth perception is designed so that scores are normally distributed with a mean of 50 and a standard deviation of 10. Use the 68-95-99.7 rule to find the following values. A) Percentage of scores less than 50 _____ B) Percentage of scores less than 60 _____ C) Percentage of scores greater than 70 _____ D) Percentage of scores greater than 40 _____ ***If you can explain step by step how to figure this out...
SAT verbal scores are normally distributed with a mean of 489 and a standard deviation of 93. Use the empirical rule (also called 68-95-99.7 rule) to determine what percentage of the scores lie. a) between 210 and 675. b). Above 675?
5. Suppose a set of math test scores is normally distributed with a mean of 100 (you do not need to know the standard deviation to answer this question, but you may find it helpful to plug in a standard deviation of your choice). If you randomly select a sample of scores from this distribution, which of the following probabilities is higher? Explain your answer. • The probability of the sample mean falling between 100 and 105 with a sample...
Suppose a normally distributed set of data has a mean of 172 and a standard deviation of 15. Use the 68-95-99.7 rule to determine the percent of scores in the data set expected to be between the scores 142 and 187. Give your answer in decimal form and keep all decimal places throughout your calculations and in your final answer.
Scores on a test are normally distributed with a mean of 70 and standard deviation of 10. Applying the Empirical Rule, we would expect the middle 95% of scores to fall between what two values? 40 and 100 50 and 90 55 and 85 60 and 80 65 and 75
Scores on a test are normally distributed with a mean of 65 and a standard deviation of 10. Find the score to the nearest whole number which separates the bottom 81% from the top 19%. A. 88 B. 68 C. 56 D 74
5. Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Find the probability that a randomly selected thermometer reads between −2.26 and −1.53 and draw a sketch of the region. 6. Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the probability of a bone...