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Tems11 [23]
3 years ago
5

In performing a chi-square goodness-of-fit test for a normal distribution, a researcher wants to make sure that all of the expec

ted cell frequencies are at least five. The sample is divided into 7 intervals. The second through the sixth intervals all have expected cell frequencies of at least five. The first and the last intervals have expected cell frequencies of 1.5 each. After adjusting the number of intervals, the degrees of freedom for the chi-square statistic is____________.a. 2b. 3c. 5d. 7
Mathematics
1 answer:
Sholpan [36]3 years ago
3 0

Answer:

The degrees of freedom for the chi square statistic is 7-4=3

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Evaluate the expression 8n for n = 1 5/12
ad-work [718]

Answer

8n=34/3

Step-by-step explanation:

1 5/12=17/12

17/12*8/1=136/12=34/3

4 0
2 years ago
Drag each label to the correct location on the table. Each label can be used more than once. Match the attributes to the quadrat
nikklg [1K]

9514 1404 393

Answer:

  • f: x-intercept (-2, 0), y-intercept (0, -8), axis of symmetry x = 1
  • g: x-intercept (-2, 0), y-intercept (0, 8), minimum value -1
  • h: axis of symmetry x = 1

Step-by-step explanation:

The equations can be written in factored form and vertex form to see the x-intercepts, axis of symmetry, and extreme value.

The y-intercept is the constant in the equation in standard form.

The axis of symmetry is the vertical line through the vertex.

__

<h3>f(x)</h3>

f(x) = x² -2x -8 = (x -4)(x +2) = (x -1)² -9

  x-intercept (-2, 0), y-intercept (0, -8), axis of symmetry x = 1

__

<h3>g(x)</h3>

g(x) = x² +6x +8 = (x +2)(x +4) = (x +3)² -1

  x-intercept (-2, 0), y-intercept (0, 8), minimum value -1

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<h3>h(x)</h3>

h(x) = -x² +2x = -(x)(x -2) = -(x -1)² +1

  axis of symmetry x = 1

_____

<em>Additional comment</em>

We have only listed the intercepts, axis, and extreme where the values match a label.

5 0
3 years ago
In a survey of 368 people, 81 drink milk straight from the milk carton. For the sample, find the sample proportion, the margin o
barxatty [35]
The best answer is C.
5 0
3 years ago
What is the solution to this equation -13x =25
abruzzese [7]

Answer:

-1 12⁄13

Step-by-step explanation:

-13x = 25 [Divide by -13]

x = -1 12⁄13

13 is your <em>divisor</em>, which will be your denominator, and the numerator is your <em>remainder</em><em>.</em><em> </em>Since 13 goes into 25 ONCE, 1 gets multiplied by 13 to get 13, then deduct that from 25 to get your remainder of 12. This is where you start putting the pieces together as a mixed number. Then attach the negative because whenever you divide a positive by a negative, you get a negative:

-25⁄13 = -1 12⁄13

I am joyous to assist you anytime.

3 0
3 years ago
Brian has reduced his cholesterol level by 18% after his last check up. If his original level was 220, what is his approximate
Drupady [299]

Answer:

B

Step-by-step explanation:

multiply 18% and 220 which is 39.6

subtract 39.6 from 220 which is 180.4

simplify

3 0
3 years ago
Read 2 more answers
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