Question

# please help as i am lost

The cholesterol level of patients who had heart attacks was measured two days after

the heart attack and then again four days after the heart attack. The researchers want to see if the cholesterol level of patients who have heart attacks reduces as the time since their heart attack increases.

Data is in following table:

Patient Cholesterol day 2 Cholesterol day 4

1 270 218

2 236 234

3 210 214

4 142 116

5 280 200

6 272 276

7 160 146

8 220 182

9 226 238

10 242 288

11 186 190

12 266 236

13 206 244

14 318 258

15 294 240

16 282 294

17 234 220

18 224 200

19 276 220

20 282 186

21 360 352

22 310 202

23 280 218

24 278 248

25 288 278

26 288 248

27 244 270

28 236 242

Does the data show that *Reiki* treatment reduces pain? at the 5% level.

**IF μ**

_{1}

*= mean VAS before**Reiki*treatment. AND*μ*_{2}

**= mean VAS after**

*Reiki*treatment. Which of the following statements COULD define the null hypothesis*H*_{O}

**?**

** μ**

_{1}

**−**

*μ*_{2}

*>*0 (*μ*_{d}

*> 0)**μ*_{1}* - μ*_{2}* *< 0 (*μ*_{d}* *< 0)

*μ*_{1}** - μ**

_{2}

*=*0*(**μ*_{d}

*= 0)**μ*_{1}* + μ*_{2}* *= 0

** IF μ**

_{1}

*= mean VAS before**Reiki*treatment. AND*μ*_{2}

**= mean VAS after**

*Reiki*treatment. Which of the following statements COULD BE the null hypothesis*H*_{O}

**?**

** μ**

_{1}

**−**

*μ*_{2}

*<*0 (*μ*_{d}

*< 0)* *μ*_{1}* - μ*_{2}* *> 0 (*μ*_{d}* *> 0)

*μ*_{1}** - μ**

_{2}

*=*0*(**μ*_{d}

*= 0)**OR *

*μ*_{1}* + μ*_{2}* *= 0

** **

** WHAT WOULD BE the level of significance α used:**

*in decimal form. Examples: *0.01 0.02 0.05 0.10

** WHATS sample mean of differences x¯d**

*in decimal form to nearest hundredth (no spaces) Examples: *0.01 3.37 -11.47 21.00

**WHATS THE sample standard deviation of differences s**

_{d}

*Enter in decimal form to nearest ten-thousandth. Examples of correctly entered answers: *

0.0001 0.0200 3.5607 -0.0074

* *

** Calculate and enter statistic**

*Enter value in decimal form rounded to nearest ten-thousandth, with appropriate sign (no spaces). Examples:*

-2.0104 -0.3070 +1.6000 +11.0019

** WHAT IS THE degrees of freedom for the sample of differences df**

_{d}

*:**Enter value in integer form. Examples of correctly entered answers:*

2 5 9 23 77

**WHAT IS THE p-value corresponding to THE test statistic.**

*Enter value in decimal form rounded to nearest ten-thousandth. Examples of correctly entered answers:*

0.0001 0.0021 0.0305 0.6004 0.8143 1.0000

** **

**(ix) Comparing p-value and α value, what could be the correct decision to make for this hypothesis test? **

**Accept H**

_{o, }

**Fail to reject**

*H*_{o, }

**Reject**

*H*_{o, OR }

**Accept**

*H*_{A}

** **

**(x) WHICH statement would most correctly interpret the result:**

A. The result is statistically significant at .05 level of significance. Sufficient evidence exists to support the claim that the *Reiki* treatment reduces pain.

B. The result is statistically significant at .05 level of significance. There is not enough evidence to support the claim that the *Reiki* treatment reduces pain.

C. The result is not statistically significant at .05 level of significance. There is not enough evidence to support the claim that the *Reiki* treatment reduces pain.

D. The result is not statistically significant at .05 level of significance. Sufficient evidence exists to support the claim that the *Reiki* treatment reduces pain.

#### Top Answer

i) 1 - 2 = 0 ( d = 0) ii) 1 - 2 > 0 ( d >0) iii) level of... View the full answer