Complete Question
The complete question is shown on the first uploaded image
Answer:
1
The correct option is C
2
The correct option is C
Step-by-step explanation:
From the table give
The sample sample size is n = 4
Generally the sample mean of the service life for sample 2 is mathematically represented as
[tex]\= x_2 = \frac{525 + 515 + 505 + 515}{4}[/tex]
[tex]\= x_2 = 515 \ hours[/tex]
Generally the sample mean of the service life for sample 1 is mathematically represented as
[tex]\= x_1 = \frac{495 + 500 + 505+ 500}{4}[/tex]
[tex]\= x_1 = 500 \ hours[/tex]
Generally the sample mean of the service life for sample 3 is mathematically represented as
[tex]\= x_3 = \frac{470 + 480 + 460+ 470}{4}[/tex]
[tex]\= x_3 = 470\ hours[/tex]
Generally the mean of the sampling distribution of sample mean is mathematically represented as
[tex]\mu_{\= x} = \frac{\= x_ 1 +\= x_ 2+\= x_ 3 }{3}[/tex]
=> [tex]\mu_{\= x} = \frac{500 + 515+470 }{3}[/tex]
=> [tex]\mu_{\= x} =495 \ hours[/tex]
