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Oksana_A [137]
3 years ago
6

Using traditional methods it takes 101 hours to receive an advanced driving license. A new training technique using Computer Aid

ed Instruction (CAI) has been proposed. A researcher believes the new technique may reduce training time and decides to perform a hypothesis test. After performing the test on 280 students, the researcher decides to reject the null hypothesis at a 0.05 level of significance.
What is the conclusion?
a. There is sufficient evidence at the 0.02level of significance that the new technique reduces training time.
b. There is not sufficient evidence at the 0.02 level of significance that the new technique reduces training time.
Mathematics
1 answer:
babunello [35]3 years ago
6 0
The answer will be B
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Consider points A(1,0, −5) and B(2, −3,6).
Bumek [7]

Answer:  a) \hat{i}-3\hat{j}+11\hat{k} b)√131.

Step-by-step explanation:

Since we have given that

A(1,0,-5), is rewritten in vector form is given by

1\hat{i}-5\hat{k}

B(5,-3,6) is rewritten in vector form is given by

2\hat{i}-3\hat{j}+6\hat{k}

a. What is the component form of AB?

So, it becomes,

\vec{AB}=(2-1)\hat{i}+(-3-0)\hat{j}+(6+5)\hat{k}\\\\\vec{AB}=\hat{i}-3\hat{j}+11\hat{k}

b. What is the magnitude of AB?

\mid AB\mid=\sqrt{1^2+(-3)^2+11^2}\\\\\mid AB\mid=\sqrt{1+9+121}\\\\\mid AB\mid=\sqrt{131}

Hence, a) \hat{i}-3\hat{j}+11\hat{k} b)√131.

4 0
3 years ago
Need someone’s help with this please!!!
ivann1987 [24]
The answer is number 1
3 0
3 years ago
What is the value of the expression below?<br> -8 + 19 + 8<br> 0<br> 11<br> 19<br> 35
Inga [223]

Answer:

19

Step-by-step explanation:

-8+8=0

0+19=19

Hope it helps.

8 0
3 years ago
Solve both of these please.
MAVERICK [17]

Answer:

1.

( n + 4 ) - 9

- n - 4 - 9

- n - 13

2.

40 = x - 1

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Step-by-step explanation:

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8 0
3 years ago
What is 2987654 × the square root of 8
elena-14-01-66 [18.8K]

Answer:

8365431.2

Step-by-step explanation:

you will multiply 2987654 * the square root of 8 which is equal to at least 2.8 (that is rounding of course)=8365431.2

5 0
4 years ago
Read 2 more answers
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