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Jobisdone [24]
3 years ago
10

Define: voluntary response a) population is divided into similar groups and a SRS is chosen from each group. b) the explanatory

variable(s) in an experiment. c) people who choose themselves for a sample by responding to a general appeal. d) choosing the individuals easiest to reach. e) directly holding extraneous factors constant. f) gives each member of the population a known chance to be selected. g) using extraneous factors to create similar groups. h) successively smaller groups are selected within the population in stages. i) every possible sample of a given size has the same chance to be selected.
Mathematics
1 answer:
Brut [27]3 years ago
6 0

Answer:

box office in Description of the video game song am god dble the video game song

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Find the m <3 if m<5=130 and m<4 =70
RSB [31]

Answer: 60°

<u>Step-by-step explanation:</u>

∠5 and ∠2 form a Linear Pair so their angles are supplementary.  

∠5 + ∠2 = 180

130 + ∠2 = 180

         ∠2 = 50

∠2 + ∠3 + ∠4 = 180    <em>Triangle Sum Theorem</em>

50 + ∠3 + 70 = 180

        ∠3 + 120 = 180

        ∠3           = 60

4 0
3 years ago
A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past
Minchanka [31]
<h2><u>Answer with explanation</u>:</h2>

Let \mu be the distance traveled by deluxe tire .

As per given , we have

Null hypothesis : H_0 : \mu \geq50000

Alternative hypothesis : H_a : \mu

Since H_a is left-tailed and population standard deviation is known, thus we should perform left-tailed z-test.

Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

where, n= sample size

\overline{x}= sample mean

\mu= Population mean

s=sample standard deviation

For n= 31,\ \sigma=8000,\ \overline{x}=46,800\ \&\ s=46,800, we have

z=\dfrac{46800-50000}{\dfrac{8000}{\sqrt{31}}}=-2.23

By using z-value table,

P-value for left tailed test : P(z≤-2.23)=1-P(z<2.23)   [∵P(Z≤-z)=1-P(Z≤z)]

=1-0.9871=0.0129

 Decision : Since p value (0.0129) < significance level  (0.05), so we reject the null hypothesis .

[We reject the null hypothesis when p-value is less than the significance level .]

Conclusion : We do not have enough evidence at 0.05 significance level to support the claim that t its deluxe tire averages at least 50,000 miles before it needs to be replaced.

4 0
3 years ago
How do you solve 38.7×10 to the fourth power
faltersainse [42]

ndex Notation and Powers of 10

10 to the Power 2

The exponent (or index or power) of a number says

how many times to use the number in a multiplication.

102 means 10 × 10 = 100

(It says 10 is used 2 times in the multiplication)

Example: 103 = 10 × 10 × 10 = 1,000

In words: 103 could be called "10 to the third power", "10 to the power 3" or simply "10 cubed"

Example: 104 = 10 × 10 × 10 × 10 = 10,000

In words: 104 could be called "10 to the fourth power", "10 to the power 4" or "10 to the 4"

8 0
3 years ago
Hello please help i’ll give brainliest:)
nika2105 [10]

Answer:

Its is 85

Step-by-step explanation:

It is 85 because you need to see out of all of those numbers which one is one is in the middle so just mark one number from each side untill you get to the middle number!

7 0
3 years ago
Simplify.
Dafna11 [192]

Answer:

C. 2x^2-7x+7

Step-by-step explanation:

(3x^2-2x+2)-(x^2+5x-5)     <em>Given</em>

From the given you will subtract like terms from both parenthesis.

3x^2-x^2=2x^2

-2x-5x=-7x

2-(-5)=7                      

6 0
3 years ago
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