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PtichkaEL [24]
3 years ago
13

Someone please Help me it’s due soon !!!! Use steps please

Mathematics
2 answers:
ludmilkaskok [199]3 years ago
6 0
Answer and explanation: picture shown below

Leviafan [203]3 years ago
4 0

Answer:

4/3 or 1 1/3

Step-by-step explanation:

cube root of 64 = 4

cube root of 27 is 3

4/3 or 1 1/3

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A​ 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense he
Orlov [11]

Answer:

We conclude that the the touch therapists does not use a method equivalent to random guesses.

Yes, the results suggest that touch therapists are​ effective.

Step-by-step explanation:

We are given that in a 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field.

Among 264264 ​trials, the touch therapists were correct 105105 times.

<u><em>Let p = proportion that touch therapists uses a random guess method.</em></u>

Here, random guess means; p = 50%

So, Null Hypothesis, H_0 : p = 50%     {means that the touch therapists use a method equivalent to random guesses}

Alternate Hypothesis, H_A : p \neq 50%     {means that the touch therapists does not use a method equivalent to random guesses}

The test statistics that would be used here <u>One-sample z proportion statistics</u>;

                         T.S. =  \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p  = sample proportion of touch therapists were correct = \frac{105}{264} = 0.39

            n = sample of trials = 264

So, <em><u>test statistics</u></em>  =  \frac{\frac{105}{264} -0.50}{\sqrt{\frac{\frac{105}{264}(1-\frac{105}{264})}{264} } }  

                                =  -3.395

The value of z test statistics is -3.395.

<em>Now, at 0.05 significance level the z table gives critical value of -1.96 and 1.96 for two-tailed test. Since our test statistics does not lie within the range of critical values of z, so we have sufficient evidence to reject our null hypothesis as it will in the rejection region due to which </em><u><em>we reject our null hypothesis</em></u><em>.</em>

Therefore, we conclude that the the touch therapists does not use a method equivalent to random guesses.

Yes, the results suggest that touch therapists are​ effective.

3 0
2 years ago
Determine the intercepts of the line.
Damm [24]
Y int.: (0,-1.2)
X int.: (-0.7,0)
6 0
3 years ago
Which property is used to write a(x + y) = ax + ay
stealth61 [152]
The Distributive Property. You are distributing a to x + y.

Hope this helps!
3 0
3 years ago
Read 2 more answers
I WILL GIVE BRAINLIEST
Vaselesa [24]

Answer:

no

Step-by-step explanation:

80-225*1/3=80-75=5

3 0
3 years ago
The sum of two numbers is 128. Their difference is 114. Find the numbers
gregori [183]

Answer:

14?

Step-by-step explanation:

8 0
2 years ago
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