It is assumed that the test results for a class follow a normal distribution with a mean of 78 and a standard deviation of 36. If you know that a student's grade is greater than 72, what is the probability that it is greater than 84?
It is assumed that the test results for a class follow a normal distribution with a...
Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 111 and a standard deviation of 10. You select a sample of 64 people. What is the probability of getting a sample mean of greater than 108? .0082 .9918 .3821 .6179
The grade point averages of the students in a large statistics class follow a normal distribution with a mean of 3.0 and a standard deviation of 0.25. What is the probability that a randomly sampled student from this class has a GPA of less than 2.95? (hint: you will need to use the table on page 175)
Assume that class grades follow a normal distribution of mean μ = 75 and the variance σ2 =144. a) Find the probability that an individual's grade is greater than 81. b) What should be the interquartile range? c)Suppose you select at random (and independently) 10 students. What is the probability that only two of these students have a grade greater than 75? d) If you draw a sample of size n = 10 from the population of grades described in...
If the results of an examination have a normal distribution with a mean of 78 and σ = 36 a) What is the probability that a person will obtain a grade higher than 72? b) What should be the minimum passing grade, if the teacher intends that only 28.1% of the students pass (percentage of the right tail)? Write your answer as XX.XX c) What must be the minimum passing grade for only 20% to pass the exam (percentage of...
URGENT 4. The test grades in some class follow a normal distribution (we will call it X) with o = 8. Use this information (and the chart!) to answer the following questions: (a) If there is a 60% chance that a student scores higher than a 75, find , the average test grade for this class. (b) Using the you found in part (a), determine P(72 < X <90).
Suppose the diastolic blood pressure of females follow Normal distribution with Mean = 80 and Standard deviation - 3. The probability that the diastolic blood pressure of a female is greater than 78 is given as None 0.5138 0.7475 0.2392 0
A teacher sets a test for a class of students. The teacher decides to analyze the test results using statistical analysis techniques. Given the table of results below, complete the following tasks: CLASS RESULTS Student Test Score (%) Thomas 74 Charles 55 Sarah 81 Mathew 68 James 71 Jessica 74 Daniel 86 Jack 66 Emma 73 Laura 72 Joshua 84 Alice 68 Samantha 70 a). Calculate the Mean of the test scores. b). Calculate the Median of the test scores....
A teacher sets a test for a class of students. The teacher decides to analyse the test results using statistical analysis techniques. Given the table of results below, complete the following tasks: CLASS RESULTS STUDENTS TEST SCORE% Thomas 74 Charles 55 Sarah 81 Mathew 68 James 71 Jessica 74 Daniel 86 Jack 66 Emma 73 Laura 72 Joshua 84 Alice 68 Samantha 70 a). Calculate the Mean of the test scores. b). Calculate the Median of the test scores. c)....
Suppose that the current measurements in a strip of wire are assumed to follow a normal distribution with a mean of 10 milliamperes and a standard deviation of 2 milliamperes. What is the probability that a measurement exceeds 13 milliamperes? What is the probability that a current measurement is between 9 and 11 milliamperes?
1 Diastolic blood pressures are assumed to follow a normal distribution with a mean of 87 and a standard deviation of 10. a. What proportion of people have diastolic blood pressure less than 90? n have diastolic blood pressur c. If someone has a diastolic blood pressure of 100, what percentile is he/she in? 2. Suppose that the average Lehman College student reports using social media like Facebook and Snapchat an average of 6 hours a week, with a standard...