144 Answered Questions for the topic Standard Deviation

07/25/19

Statistics question

A sample of n = 36 scores has a mean of M = 85 and a standard deviation of s = 24. What is the estimated standard error of the t-distribution of sample means (i.e., of the t-test for a single sample)? more

06/27/19

06/16/18

Homework Help really struggling

Question 6    Which of the following is NOT TRUE concerning the graphic depiction ("the curve") of a distribution for means?Question options: A) The curve is skewed to the right.  B) The area under... more

06/14/18

Help me with this problem please

The average adult Indian Rhino weighs 4600 pounds with a standard deviation of 500 pounds. a) What percent of Indian Rhinos are more than 4000 pounds? b) Rhinos in the 80th percentile are called... more

05/22/18

standard deviation

whats the standard deviation of the data set below, Rounding your answer to three decimal places?2, 4, 6, 6, 8, 10, 11, 12, 14, 16, 17, 18, 18, 18

05/05/18

How do I determine the whole number of standard deviations that includes all data values?

The mean length of Beethoven’s nine symphonies is 37 minutes; the standard deviation is 12 minutes. The datavalues are the following minutes: 23, 30, 47, 35, 30, 40, 35, 22, and 65. Determine the... more

04/27/18

To find the Mean and Standard Deviation

Total amount of time (x, in minutes) spent commuting by the entire 240 residents of a housing area was recorded.   Given that total x = 10,980 and total ( x - µ )² = 23,191. Compute the mean and... more

04/11/18

About how many members are expected to be between 15 years old and 31 years old?

The ages of members of an online gaming group are normally distributed with a mean of 23 years and a standard deviation of 4 years.There are 300 members in the group.

04/11/18

What is the age of a movie attendee with a z-score of −1.2 ?

The ages of people in a movie theater are normally distributed with a mean of 32 years and a standard deviation of 6.2 years. (round to nearest tenth)

04/11/18

What is the z-score of 105? (round to nearest hundredth

A normal distribution has a mean of 102 and a standard deviation of 2.9.

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