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Makovka662 [10]
4 years ago
8

You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of sleep subjects get each nig

ht. You measure hours of sleep for 12 subjects with the following results. Construct a 95% and 99% confidence interval for the mean number of hours slept for the population (assumed normal) from which you took the data.
8.2 9.1 7.7 8.6 6.9 11.2 10.1 9.9 8.9 9.2 7.5 10.5
Mathematics
1 answer:
umka2103 [35]4 years ago
3 0

Answer:no

Step-by-step explanation:

jolu frcu

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Plz help, I don't understand this.
Oksanka [162]

Answer:

see explanation

Step-by-step explanation:

consecutive even integers have a difference of 2 between them

for example 2, 4, 6 are 3 consecutive even integers

In general if we let the first integer be k then the next 2 integers are

k + 2 and k + 4

the sum of these equals 4 times the first integer, that is 4k, hence

k + k + 2 + k + 4 = 4k

3k + 6 = 4k ( subtract 3k from both sides )

6 = k

the 3 consecutive integers are

k = 6

k + 2 = 6 + 2 = 8

k + 4 = 6 + 4 = 10

that is 6, 8 and 10

note that sum = 6 + 8 + 10 = 24

and 4 × 6 = 24

confirming the sum of the 3 integers equals 4 times the first integer




7 0
3 years ago
Use substitution to solve this system:
Oliga [24]

awnser:

y = 62 /3

Step-by-step explanation:

5(6)+3y=92

7 0
3 years ago
Please help ill mark you the brainlist The scale on a map indicates that 1 cm represents 50 km. If two cities are 400 km apart,
Andrej [43]

Answer:

8 cm

Step-by-step explanation:

divide 400 by 50 which is 8.

8 0
3 years ago
Factor completely 81x2 − 100. (1 point) (10x − 9)(10x − 9) (10x − 9)(10x + 9) (9x − 10)(9x + 10) (9x − 10)(9x − 10)
MArishka [77]

The complete factorization of the equation 81x² - 100 is; (9x - 10)(9x + 10)

<h3>How to factorize quadratic equations?</h3>

We are given the quadratic equation;

81x² - 100

Now, according to quadratic identities, we know that;

(a + b) * (a - b) = a² - b²

Now, our equation can also be expressed as;

81x² - 100 = 9²x² - 10²

Thus, applying the quadratic identity gives us;

(9x + 10)(9x - 10)

Read more about factorization of quadratic equations at; brainly.com/question/1214333

#SPJ1

5 0
2 years ago
What is the area of a rectangle that is 1/2 of a meter long and 3/8 of a meter wide?
Margarita [4]

Answer:

Step-by-step explanation:

note : the area of a rectangle  is : A = L ×W

L : lenght    W  : the width

A = (1/2)(3/8) = 3/16 m²

4 0
3 years ago
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