Two thousand students appeared in an examination. Distribution of marks is assumed to be normal with mean U=30 and standard deviation = 6.25. How many students are expected to get marks between 1...
Two thousand students appeared in an examination. Distribution of marks is assumed to be normal with mean U=30 and standard deviation = 6.25. How many students are expected to get marks between 1...
In a particular city, 40% of high school graduates go to college upon graduation. Suppose that we take repeated random samples, each of 300 high school graduates from that city, and made a...
The following data, heartbeats per minute, was collected for a group of 10 men subjected to a stressful situation. 120, 122, 124, 127, 127, 133, 140, 141, 142, 144 1. What is the...
Suppose an exam had an average (mean) score of 55% and a standard deviation of 15%. Table 6.3 Curving Grades A 1.5 standard deviations above the mean or higher B 0.5 to 1.5 standard...
Americans spend an average of 5 hours per day online. If the standard deviation is 37 minutes, find the range in which at least 93.76% of the data will lie.
A state university has no French course, instead places all freshmen scoring at least 60 on a proficiency exam (Mean=50, Standard Deviation =10) to an advanced composition course. If the scores are...
What is the probability that the temperature will get above zero?
Score 100 95 90 82 Frequency 1 2 3 ...
The mean is 93.8 and the standard deviation is 6.2. Find the z score for the data item 79
I just need to know the standard deviation for 4 different numbers: 2.3000 1.7333 1.6000 2.6667 Help please!
I have been given values for 10%, 50% and 90% of a distribution. From these numbers, how can I compute the mean and standard deviation? I'll give an example....Temperature distribution 10th...
A paint manufacturer uses a machine to fill gallon cans with paint. a)The manufacturers wants to estimate the mean volume of paint the machine is putting in the cans within 0.25 ounces...
Manbir is a local fisherwoman who has been recording the mean weight of the fish that she catches. She discovered that the distribution of weight is normal with a mean of 2.9kg and a standard deviation...
A student scores 61 on a test. The class average is 81, with a standard deviation of 10 points. What percentage of the class scored below this student? How do I solve this problem?...
1. IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. If a certain person has an IQ of 131, what percentage of the population has a lower IQ? 2...
Janey always waits until her gas tank is nearly empty before she refuel a. She keeps a record of the distance she drives on each tank of gas. The distance varies, depending on the weather...
Suppose exam scores form an approximately normal distribution that has μ = 500 points and σ = 100 points. Letter grades on the exam were distributed as follows: Ds made up 16% of the exam, Cs 30%,...
At the end of a bowling tournament, three friends analyzed their scores. Erinn's mean bowling score is 92 with a standard deviation of 14. Declan's mean bowling score is 130 with a standard...
Describe your findings
there are 2,000 freshman who take integrated math 1 at Statesville high school. the scores for the last unit test were distributed normally with a mean of 70 and a standard deviation of 7