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allochka39001 [22]
3 years ago
9

Help me please!! i need help with this science question put it under math because I couldn't find science in the subjects box

Mathematics
2 answers:
11Alexandr11 [23.1K]3 years ago
7 0
I believe the answer is a!! please mark brainliest answer if i helped
Goshia [24]3 years ago
4 0
The answer should be B
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Persons having Raynaud's syndrome are apt to suffer a sudden impairment of blood circulation in fingers and toes. In an experime
Citrus2011 [14]

Answer:

There is enough evidence to say that the true average heat output of persons with the syndrmoe differs from the true average heat output of non-sufferers.

Step-by-step explanation:

We have to perform a hypothesis test on the difference between means.

The null and alternative hypothesis are:

H_0: \mu_1-\mu_2=0\\\\H_a: \mu_1-\mu_2

μ1: mean heat output for subjects with the syndrome.

μ2: mean heat output for non-sufferers.

We will use a significance level of 0.05.

The difference between sample means is:

M_d=\bar x_1-\bar x_2=0.63-2.09=-1.46

The standard error is

s_{M_d}=\sqrt{\sigma_1^2/n_1+\sigma_2^2/n_2}=\sqrt{0.3^2/9+0.5^2/9}=\sqrt{ 0.038 } \\\\ s_{M_d}=0.194

The t-statistic is

t=\dfrac{M_d}{s_{M_d}}=\dfrac{-1.46}{0.194}=-7.52

The degrees of freedom are

df=n_1+n_2-2=9+9-2=16

The critical value for a left tailed test at a significance level of 0.05 and 16 degrees of freedom is t=-1.746.

The t-statistic is below the critical value, so it lies in the rejection region.

The null hypothesis is rejected.

There is enough evidence to say that the true average heat output of persons with the syndrmoe differs from the true average heat output of non-sufferers.

5 0
3 years ago
What is 28:36 in simplest form
xeze [42]
It would be 7:9 because if you divide each side by 4 then you can get it in simplest form
6 0
3 years ago
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What is simplify 5+3-9
sergij07 [2.7K]

Answer:

-1

Step-by-step explanation:

first 5+3=8

8-9=-1

6 0
2 years ago
Whats the answer ?????
wolverine [178]

46.06 would be the answer

7 0
3 years ago
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Which has the greatest mass?
puteri [66]
A is the correct answer
8 0
3 years ago
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