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Y_Kistochka [10]
2 years ago
11

Testing: H 0 : μ ≥ 15.6 H 1 : μ < 15.6 Your sample consists of 46 values, with a sample mean of 13.4. Suppose the population

standard deviation is known to be 4.47. a) Calculate the value of the test statistic, rounded to 2 decimal places. z =
Mathematics
1 answer:
guajiro [1.7K]2 years ago
5 0

Answer:

The value of the test statistic is <em>z</em> = 3.34.

Step-by-step explanation:

The information provided is:

\bar x=13.4\\\sigma = 4.47\\n=46

The test statistic is:

Z=\frac{\mu-\bar x}{\sigma/\sqrt{n}}

  =\frac{15.6-13.4}{4.47/\sqrt{46}}\\\\=3.33806\\\\\approx 3.34

Thus, the value of the test statistic is <em>z</em> = 3.34.

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Could you please help me with this problem?
NeTakaya

First Question:

Number of trapezoids - 6

Perimeter - 72

3 + 3 + 3 + 6 = <u>15</u>

3 + 3 + 3 + 3 + 6 + 6 = <u>24</u>

3 + 3 + 6 + 3 + 3 + 6 + 3 + 6 = <u>33</u>

15 + 24 + 33 = <u>72</u>

Second Question:

Number of cubes - 6

Surface area - 24 (probably 480 since it said <em>area</em>)

first cube - 6 ones

second cube - 8 ones

Third cube - 10 ones

you could do 6 + 8 + 10 = 24 or add up all the ones (1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1) and you will still get 24

(It said <em>area</em>, and area means to multiply so maybe its 6 x 8 x 10 = 480 and not 6 + 8 + 10)

Anyways have a good day/night :) I might be wrong, but I hope I helped at least a little

3 0
2 years ago
HELPPP PLEASEEE!! This is due later tonight and I’m struggling! I’ve missed a few days of school from sickness! Help a girl out!
tekilochka [14]
10. 8x+4y=4. y=mx+b
-8x. -8x
4y=-8x+4
÷4. ÷4. ÷4
y = -2x +1
slope = -2. y-int= 1

11. slope is changing y over changing x
m = (y2 -y1)/(x2-x1) (0,-1) x1 = 0, y1=-1
(-4-(-1))/(-2-0) (-2,-4) x2 = -2, y2 = -4
(-4 + 1) / (-2)
-3/-2 = 3/2 answer is 3/2
12. b because negative cause it flip in x axis and it become flatter because of the fraction.
13. 2y =8-8x
÷2. ÷2 ÷2
y = 4 - 4x
Answer A
14. B
6 0
3 years ago
WILL GIVE BRAINLIEST, THANK YOU, AND RATING!!!
frozen [14]
64-128-256
each step double previous number
5 0
3 years ago
How do you do this? Confused, please reply ASAP.
aleksley [76]

Answer:

11. 2/5 = <u>40</u>/100 = <u>40</u>%      12. 29/50 = <u>58</u>/100 = <u>58</u>%

Step-by-step explanation:

To convert the given fraction to a fraction of 100, cross-multiply and divide.

2 × 100 = 200 / 5 = 40

Then, whenever you have a number over 100, all you need to do to get the percentage is find the numerator and add a percent sign at the end of the number.

40 ⇒ 40%

Repeat this with the second question.

29 × 100 = 2900 / 50 = 58 ⇒ 58%

5 0
3 years ago
Read 2 more answers
How can you find 10% of any number?
salantis [7]
Multiply any number by 0.1 like say u want to find 10 percent of 100. Do 100 times 0.1 and you will get the answer 10.
8 0
2 years ago
Read 2 more answers
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