Answer:
Kindly check explanation
Step-by-step explanation:
H0 : μ = 5500
H1 : μ > 5500
The test statistic assume normal distribution :
Test statistic :
(Xbar - μ) ÷ s/sqrt(n)
(5625.1 - 5500) ÷ 226.1/sqrt(15) = 2.1429 = 2.143
Pvalue from test statistic :
The Pvalue obtained using the calculator at df = 15 - 1 = 14 is 0.025083
α = 0.05
Since ;
Pvalue < α
0.025083 < 0.05 ; Reject H0
The confidence interval :
Xbar ± Tcritical * s/sqrt(n)
Tcritical at 95% = 1.761 ;
margin of error = 1.761 * 226.1/sqrt(15) = 102.805
Lower boundary : (5625.1 - 102.805) = 5522.295
(5522.295 ; ∞)
The hypothesized mean does not occur within the constructed confidence boundary. HENCE, there is significant eveidbce to support the claim that the true mean life of a biomedical device is greater than 5500
Answer:
-5
Step-by-step explanation:
-5 is the coefficient in the term -5y
The number which is multiplied with the variable is called the coefficient of the variable
Answer:
False
Step-by-step explanation:
Repeating decimals occur or results when there is a remainder from the division and further division will still take place.
Answer:
use a graphinig calculator
Step-by-step explanation:
2x² - 4x = 14
<u>Divide by 2 through:</u>
x² - 2x = 7
<u>Add in the term (b/2)² :</u>
x² - 2x + (2/2)² = 7 + (2/2)²
<u>Complete the square:</u>
(x - 1)² = 7 + 1
<u>Combine like terms:</u>
(x - 1)² = 8
Answer: (x - 1)² = 8
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The question did not ask to solve x. But here is the solution if needed to solve x:
(x - 1)² = 8
x - 1 = ±√8
x = 1 ±√+8
x =1 + 2√2 or x = 1 - 2√2
Answer: x =1 + 2√2 or x = 1 - 2√2
