Selam purchased a pen at 20% discount on marked price but sold it at marked price find the grain per cent of the Saleem on the t
1 answer:
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Answer:
Value of the test statistic,
Step-by-step explanation:
Null hypothesis,
Alternative hypothesis,
Sample mean,
Sample size, n = 110
Standard deviation,
Significance level,
The value of the test statistics is given by the formula:
Answer:
Step-by-step explanation:
The equation represents the discriminant of a quadratic. It is the part taken from under the radical in the quadratic formula.
For any quadratic:
- If the discriminant is positive, or greater than 0, the quadratic has two solutions
- If the discriminant is equal to 0, the quadratic has one distinct real solution (the solution is repeated).
- If the discriminant is negative, or less than 0, the quadratic has zero solutions
In the graph, we see that the equation intersects the x-axis at two distinct points. Therefore, the quadratic has two solutions and the discriminant must be positive. Thus, we have .