If you have samples of n 1 equals 22 and n 2 equals 20, in performing the pooled-variance t test, you have 40 degrees of freedom.
The t-test method is a method where we analyze two sets of data which both these data are independent of each other. This pooled variance test helps us in getting the overall variance in both these different sample sets when we know that both the sample sets are almost equal.
To calculate degrees of freedom, we have the formula
df = n1 +n2 -2
According to the question, n1= 22 and n2= 20
Therefore, degree of freedom= 22 +20 -2 = 40
Hence, degree of freedom is 40.
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The answer to this is Theory (not hypothesis as some may say)
Answer:
Option A
Explanation:
When trying to understand issues, silence is a great tool, To be in the mood of silence, it helps to get every details of an issue or explanation.
Relating this to the answer choices above, it is very useful when you are following detailed analysis of the client issues, when your client is trying to explain the what he/she observed to be the root cause of a problem, when you are silence and paying attention, it help you to understand your customers pain point and helps to figure out how to solve the problem.
Answer:
The tread on the road declined sharply till in the 13th century,when the conquests of the Mongols ushered in an era of frequent and extended contacts between East and West...
With less cost,harassment and danger,many goods and materials that the Silk Road could not transfer were conveyed through the sea route.
Answer:
Researchers surveyed more than 7,500 adults between the ages of 18 to 68 who chose to answer online survey questions at the end of a French television program about the secrets of happiness. People were asked questions to determine their personality through subjects like conscientiousness and emotional stability, and then told the re-answer the questions as if they were 10 years older and younger. The "past" and "future" answers were then compared to people who were in corresponding age groups at the time of taking the survey.
The results showed that people predicted they would change less over 10 years compared to responses from those who looked back 10 years and realized how much they had changed.
For example, 68-year-olds said they had experienced modest personality changes over the past 10 years, while surveyed 58-year-olds predicted very little if any change in the coming decade, even though their own survey results showed they had changed their personality over the past 10 years, according to Science.
Explanation:
