In a random sample of 9 cell phones, the mean full retail price was $546.70 and the standard deviation was $195.00. further research suggests that the population mean is $428.87. does the t-value for the original sample fall between minus−t 0.99 and st 0.99?

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = $428.87

Sample mean, = $546.70

Sample size, n = 9

Sample standard deviation, s = $195.00

Formula:

Putting all the values, we have

Thus, the t-value does not lie in the interval (-0.99,0.99)

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step-by-step explanation: