![nurikchan](/avatars/46033.jpg)
nurikchan
27.11.2019 •
Mathematics
In statistics, what does df denote? if a simple random sample of 22 speeds of cars on california highway 405 is to be used to test the claim that the sample values are from a population with a mean greater than the posted speed limit of 65 mi/h, what is the specific value of df?
Solved
Show answers
More tips
- L Leisure and Entertainment How Many Seasons are There in the TV Show Interns?...
- S Sport When will the Biathlon World Championships 2011 take place in Khanty-Mansiysk? Answers to frequently asked questions...
- H Health and Medicine Trading Semen for Money: Where Can You Sell and Why Would You Want to?...
- F Food and Cooking Homemade French Fries: The Ultimate Guide...
- H Health and Medicine How to Increase Blood Pressure without Medication?...
- S Style and Beauty Choosing a Hair Straightener: Specific Criteria to Consider...
- F Food and Cooking How to Make Polendwitsa at Home?...
- S Science and Technology When do we change our clocks?...
- L Leisure and Entertainment What to Give a Girl on March 8?...
- F Family and Home Is it Worth Knowing the Gender of Your Child Before Birth?...
Answers on questions: Mathematics
- M Mathematics Find the amount of simple interest. $72.80, 4 1/4%, 2 years...
- M Mathematics According to the synthetic division below, which of the following statements are true? Check all that apply. 54 -17 20 -15 15 4 3 0 O A. The number -5 is a root of Fx) = 4x2 - 17x-15....
- M Mathematics What is a simpler form of 6x(2x3 + 7x)?...
- M Mathematics Identify the value that is not in the range of the piecewise function. a.-2 b.1 c.2 d.5...
- S Social Studies Under the equal protection clause, what level of scrutiny would MOST likely be applied to a federal regulatory scheme such as motor vehicle licensing?...
- H History You are a resident of a nation with a developing economy. Which of the following factors is something that would most likely be affecting your country’s development?...
- E English Help Which sentence uses the semicolon correctly? O 1. The extremely hot summer afternoons of southern Spain are best spent indoors indulging in a post-lunch siesta (nap); watching...
Ответ:
df refers to degrees of freedom.
the specific value of df in the example is 21.
Step-by-step explanation:
In statistics, degrees of freedom is the number of values in the final calculation of a statistic that are free to vary. It is the number of independent ways by which a dynamic system can move, without violating any constraint imposed on it.
In other words, degrees of freedom is the number of independent pieces of information that went into calculating the estimate, and calculated by
n – 1 where “n” is the number of items in your set.
In the question, a simple random sample of 22 speeds of cars on California Highway 405 is to be used to test the claim, thus the number of items in the survey are 22.
From this we get:
df=22-1=21
Ответ: