Identify which assumption is needed to use the linear regression model to obtain a meaningful fit that represents the true relationship well.

chillywilly12a 2020-11-27 Answered
Identify which assumption is needed to use the linear regression model to obtain a meaningful fit that represents the true relationship well.
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hesgidiauE
Answered 2020-11-28 Author has 106 answers
The assumption is the population mean of response variable y has a straight-line relationship with an explanatory variable x.
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A population of values has a normal distribution with μ=121.3μ=121.3 and σ=5.8σ=5.8. You intend to draw a random sample of size n=149n=149.

Find the probability that a single randomly selected value is between 119.8 and 121.2.
P(119.8 < X < 121.2)

 

Find the probability that a sample of size n=149n=149 is randomly selected with a mean between 119.8 and 121.2.
P(119.8 < M < 121.2)

 

Enter your answers as numbers accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.


 

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