In a large class of 500 students, the mean and standard deviation of a final exam are 65 and 11, respectively If the grades distribution is not symmetric at least how many students have grade...

In a large class of 500 students, the mean and standard deviation of a final exam are 65 and 11, respectively If the grades distribution is not symmetric at least how many students have grade...

Please help! I'm very confused. Thanks!

Find the mean for a set of data with a standard deviation of 1.3, given that a value if 95 has a z score of 0.5

Person A has a z-score of -3 and is on her phone for 7 hours a day. Person B has a z-score of -4 and is on her phone for 3 hours a day. It is a normal distribution. What would be the mean of the data...

Create a data set that has five values. The mean should be 12

Explain why you did each step

I don't understand how to solve this problem and I want to fully understand it for my upcoming test

word problem I need to solve for homework. I need to know how to get the answer

The standard error of the sample mean is calculated to $1,475.73. The president wants to be able to estimate mean cost to within $1,500 of the true population mean with a probability of 80%. How many...

In a neighborhood near Simmons, there are 280 families. The average number of members per family is 3.5. How many people live in the neighborhood? a. 980 people b. 80 people c. 900 people d...

The scores of 2500 students on an exam have an approximately normal distribution with mean of 52 points and standard deviation of 11 points. Estimate how many students more than 52 points. If necessary,...

If female blood pressure is normally distributed with a mean of 114 and standard deviation of 19.8, find p12 and p77

Mean is the awseom ethin

The mean age of six persons is 49 years. The ages of five of these six persons are 56 , 34 , 40 , 51 , and 36 years. Find...

What is a real life situation in which using the median is preferable to the mean? Number examples please!

find the value of a

4x+3,7,3x-2,9x

Use the frequency distribution table below showing a sample data set for 10 students on a test with a maximum score of 12 to find the mean score. Score Frequency 1...

Mean : 21 Median : 13 Mode : 8 Range : 30 Mean Absolute Deviation : 11.9 Please don't make the answer too confusing. Thank you!

The question: The ages, x years, of 150 cars are summarised by ∑x = 645 and ∑x2 = 8287.5 Find ∑(x-y)2 where y denotes the mean of x. The...

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