Two conditions under which we can assume that the sample means follow a normal distribution are as follows:
1). If the sample size is large enough, n greater than or equals 30, the sampling distribution is approximately normal regardless of the shape of the population.
2). In order to be considered a normal distribution, a data set (when graphed) must follow a bell-shaped symmetrical curve centered around the mean.
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Solution :
The term 'literacy rate' provides the ability of a person who is from a definite age group can read or write.
a). 
does not determine the rate at which the variable explains another, but it explains the amount the amount of variability in one of the variables as explained by the other variable.
b). The slope given provides an expected improvement but it cannot guarantee the improvement. The value may be less or it could be more also.
The regression model provides the prediction and not the actual values.
The answer is :
-4.472135...
Answer: The answer is $698.00
Step-by-step explanation: For example, if you are receiving SSI and make $200 per month in earned income, the deduction will be made like this: $200 – 20 = $180 – 65 = $115.00/2 = $57.50 Meaning $57.50 would be deducted from the maximum SSI payment of $698.00 month.
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