What value is standard deviation above the mean

Assignment Help Basic Statistics

Reference no: EM131010628

The average playing time of compact discs in a large collection is 35 min, and the standard deviation is 5 min.

a. What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from the mean?

b. Without assuming anything about the distribution of times, at least what percentage of the times are between 25 and 45 min?

c. Without assuming anything about the distribution of times, what can be said about the percentage of times that are either less than 20 min or greater than 50 min?

d. Assuming that the distribution of times is normal, approximately what percentage of times are between 25 and 15 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal.

a. Roughly what proportion of vehicle speeds were between 27 and 57 mph?

b. Roughly what proportion of vehicle speeds exceeded 57 mph?

Reference no: EM131010628

Questions Cloud

Why it would be difficult for another firm : Why these lessons have made the business more successful - why it would be difficult for another firm to adopt some of this organisation's success factors

What can you say about the number of students : Based on this mean and standard deviation, what can you tell about the shape of the distribution of the variable number of answers changed from right to wrong? What can you say about the number of students who changed at least six answers from cor..

Show respect for the time of others : how can you use social media ethically from the perspective of your employer ?

Discuss how the conflict perspective : Considering that they were likely produced in a less-developed country and you purchased them in a developed country: DISCUSS how the Conflict Perspective would view this. How would the Functionalist Perspective view this?

What value is standard deviation above the mean : The average playing time of compact discs in a large collection is 35 min, and the standard deviation is 5 min. What value is 1 standard deviation above the mean? 1 standard deviation below the mean? What values are 2 standard deviations away from ..

Examine the ideas of mutual reflection : Describe the implications Stanley Cavell's ordinary language philosophy has on democracy and education. Provide an example of ordinary language philosophy. Examine the ideas of mutual reflection and mutual understanding as it relates to cultural di..

How much work is required to pull bucket up the hundred m : At the start of lifting the bucket it contains 25 kg of water but slowly loses water at a constant rate so that at the top, half of the water is in the bucket. How much work is required to pull the bucket up the 100 m?

Use of business analytics to improve their position : Describe the challenges the company may have faced by choosing to utilize business analytics that the other company did not face.

Describe examples of the different types of norms operative : What role does digital technology play in your life and what impacts do you think it has on you? Can you imagine your life without technology? What are some of the problems with our (over)reliance on technology?The Week 8 Forum meets the following co..

User Account

All Pages