standard deviation

standard deviation

I'm not much on higher math but would I use "n" or "N-1"

The mean lifetime of a certain tire is 30,000 miles and the standard deviation is 2500 miles. If we assume nothing about the shape of the distribution, approximately what percentage of all...

The distribution of the weights of 100 students has a mean of 168lbs with a standard deviation of 16lbs. Predict the number of students who have weights between 135 and 175 pounds.

Statistics thank you please

mean 6.3 standard deviation 1.49 students scores: 4,5,5,6,6,6,7,7,8,9

MEAN : 6.3 MODE:6 MEDIAN:6 STUDENTS SCORES: 4,5,5,6,6,6,7,7,8,9 STANDARD DEVIATION: 1.49

Light vehicles sold in a country must emit an average of no more than 0.11 grams per mile (g/mi) of nitrogen oxides (NOX) after 50,000 or fewer miles of driving. NOX emissions after 50,000 or fewer...

A small engine shop receives an average of 1.51 repair calls per hour, with a standard deviation of 0.37. What is the standard deviation of the number of calls they receive during six hour...

country a annual exports to country b are $3.2bilion on average with standard deviation of 0.28 billion. country a annual imports to country b are $3.5 bilion on average with standard deviation...

how would you find the standard deviation of the net income?

A small engine shop receives an average of 1.51 repair calls per per spur, with a standard deviation of 0.37. What is the standard deviation of the number of calls they receive during six...

Assume that adults have iq scores that are normally distributed with a mean of 100 and a standard deviation of 15 .

The population of current statistics students has ages with mean μ and standard deviation σ. Samples of statistics students are randomly selected so that there are exactly 38 students in each sample...

In a large class of 500 students, the mean and standard deviation of a final exam are 65 and 11, respectively If the grades have symmetric distribution, how many students have grades within 2...

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...

Full question-----> Suppose that the breathing rates for college-age students have a mound-shaped distribution, with a mean equal to 16 and standard deviation of 1.5 breaths per minute. What...

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative advantages/disadvantage of using one over...

Calculate the mean and standard deviation for the set of numbers {11,16, 20,17}

A tile company produces floor tiles that has an average thickness of 55mm, with a standard deviation of 0.6mm. For premium quality floors, the tiles must have a thickness between 54mm and 55mm. What...

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