Please help me! i'll mark you brainliest 20 points, (maths)
1 answer:
You might be interested in
Answer:
a) The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance
Null hypothesis is accepted at 0.01% level of significance
<em>They score is above 24 on the math portion of the exam</em>
<em>b) </em>
<u><em>Null Hypothesis</em></u>: There is no significance difference between the college level mathematics and math courses in high school
H₀: μ = 24
<u>Alternative Hypothesis: </u>H₁: μ ≠ 24
<u>Step-by-step explanation:</u>
<u><em>Step(i)</em></u>:-
Given random sample 'n' = 250
Given data sample mean x⁻ = 24.5
Standard deviation = 3.3
<u><em>Null Hypothesis</em></u>: There is no significance difference between the college level mathematics and math courses in high school
H₀: μ = 24
<u>Alternative Hypothesis: </u>H₁: μ ≠ 24
test statistic
a) 99% or 0.01% level of significance
Level of significance ∝ = 0.01
The Z -value 2.397 < 2.576 at 99% or 0.01% level of significance
Null hypothesis is accepted at 0.01% level of significance
<em>They score is above 24 on the math portion of the exam</em>
b) 95% or 0.05% level of significance
Level of significance ∝ = 0.05
The Z -value 2.397 > 1.96 at 95% or 0.05% level of significance
Null hypothesis is Rejected at 0.05% level of significance
<em>They score is below 24 on the math portion of the exam</em>
Answer:
x = 9.5
Step-by-step explanation:
Given
=
( cross- multiply )
3(4x - 6) = 4(2x + 5) ← distribute parenthesis on both sides
12x - 18 = 8x + 20 ( subtract 8x from both sides )
4x - 18 = 20 ( add 18 to both sides )
4x = 38 ( divide both sides by 4 )
x = = 9.5