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zzz [600]
3 years ago
10

A study was designed to compare the attitudes of two groups of nursing students towards computers. Group 1 had previously taken

a statistical methods course that involved significant computer interaction. Group 2 had taken a statistic methods course that did not use computers. The students' attitudes were measured by administering the Computer Anxiety Rating Scale (CARS). A random sample of 10 nursing students from Group 1 resulted in a mean score of 60.7 with a standard deviation of 6.9. A random sample of 15 nursing students from Group 2 resulted in a mean score of 66.3 with a standard deviation of 5.8. Can you conclude that the mean score for Group 1 is significantly lower than the mean score for Group 2? Let μ1 represent the mean score for Group 1 and μ2 represent the mean score for Group 2. Use a significance level of α=0.1 for the test. Assume that the population variances are equal and that the two populations are normally distributed. Step 1 of 4 : State the null and alternative hypotheses for the test.
Mathematics
1 answer:
NeX [460]3 years ago
3 0

Answer:

wowrjdndndnfnf dmdi fufu diff fjf fjf fifth f ouch r f ik r fir fir rir tir t

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Triangle X Y Z is shown. Angle Y X Z is a right angle. The length of Y X is 12 inches and the length of X Z is 10 inches. Angle
mario62 [17]

The best approximation for the measure of angle XYZ is 39.8° ⇒ 2nd answer

Step-by-step explanation:

Let us revise the trigonometry ratios in the right triangle ABC, where B is the right angle, AC is the hypotenuse, AB and BC are the legs of the triangle

The trigonometry ratios of the angle BAC, the opposite side to this angle is BC and the adjacent side to it is AB are

  • sin(BAC)=\frac{opposite}{hypotenuse}=\frac{BC}{AC}
  • cos(BAC)=\frac{adjacent}{hypotenuse}=\frac{AB}{AC}
  • tan(BAC)=\frac{opposite}{adjacent}=\frac{BC}{AB}

In Δ XYZ

∵ ∠ YXZ is a right angle

∴ The hypotenuse is YZ

∵ The adjacent side to ∠XYZ is XY

∵ The opposite side to ∠XYZ is XZ

∵ YX = 12 units

∵ XZ = 10 units

- Use tan ratio to find the measure of the angle because you

   have the adjacent and opposite sides of the angle XYZ

∵ m∠XYZ is x

∵ tan(x)=\frac{XZ}{XY}

∴ tan(x)=\frac{10}{12}

- To find x use the inverse of tan(x)

∵ x=tan^{-1}(\frac{10}{12})

∴ x = 39.8°

∴ m∠XYZ = 39.81°

The best approximation for the measure of angle XYZ is 39.8°

Learn more:

You can learn more about the trigonometry ratios in brainly.com/question/4924817

#LearnwithBrainly

4 0
3 years ago
Read 2 more answers
PLSS HELP
Harrizon [31]
Your answer is going to be Letter B
8 0
3 years ago
Tomas drew a rectangle with an area of 6 square centimeters. What is the greatest possible perimeter for this rectangle.
Delvig [45]
6 by 1.

This is the greatest because it makes 14 (6+6+1+1), which is greater than 3 by 2, which is only 10. (3+3+2+2)

Hope this helps!
8 0
3 years ago
I need a teacher to help or a student who good at Graphing
rodikova [14]

Answer:

A

Step-by-step explanation:

The red function is a transformation. Transformation have the following rules:

  • f(x-a) is a units shifted to the right
  • f(x+a) is a units shifted to the left
  • f(x)+a is a units shifted up
  • f(x) -a is a units shifted down

It shifts the red graph 1 unit to the right. This is f(x-1).

3 0
2 years ago
−2 /18÷1 1/4 Enter your answer as a mixed number, in simplified form, in the box.
ANTONII [103]

Answer:

-2/18 : 1 1/4

-2/18 : 5/4

-2/18 * 4/5

-2/9 * 2/5

-4/45

6 0
3 years ago
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