Question

Please show all work and **state null and research
hypotheses in complete sentences**

**Correlation Hypothesis Testing**

Person X (exercise- hr per
week) Y (stress
level)

1
5
4

2
7
2

3
6
0

4
3
7

5
6
5

6
4
4

7
4
6

**x̅**=5
(**underline dash - on top of Y)** Y=4

Q1: State your null and research hypotheses.

Q2: What are the cut-off points?

Q3: What is SSx?

Q4: What is SSy?

Q5: What is SP?

Q6: What is r?

Q7: Write your conclusion thoroughly.

Answer #1

1)

null hypothesis: Ho: ρ'= | 0 | |

Alternate Hypothesis: Ha: ρ≠ | 0 |

2)

0.05 level,two tail test and n-2= 5 df, critical r=±
0.754 |

3)

S.No | X | Y |
(x-x̅)^{2} |
(y-y̅)^{2} |
(x-x̅)(y-y̅) |

1 | 5 | 4 | 0.0000 | 0.00 | 0.0000 |

2 | 7 | 2 | 4.0000 | 4.00 | -4.0000 |

3 | 6 | 0 | 1.0000 | 16.00 | -4.0000 |

4 | 3 | 7 | 4.0000 | 9.00 | -6.0000 |

5 | 6 | 5 | 1.0000 | 1.00 | 1.0000 |

6 | 4 | 4 | 1.0000 | 0.00 | 0.0000 |

7 | 4 | 6 | 1.0000 | 4.00 | -2.0000 |

Total | 35 | 28 | 12.0000 | 34.0000 | -15.0000 |

Mean | 5.000 | 4.00 | SSX | SSY | SXY |

SSx =12

4)

SSy =34

5)SP =-15

6)

correlation r='Sxy/(√Sxx*Syy) = | -0.743 |

7)

since test statistic does not falls in rejection region we fail to reject null hypothesis |

we do not have have sufficient evidence to conclude that there is significant correlation between two variables |

Please show all work
A researcher was interested in examining a relationship between
hours of exercise and concentration level among BYC students. Also,
he was interested in examining whether hours of exercise would
predict the concentration level. Answer following questions based
on the given data.
Exercise
(X)
Concentration level (Y)
0
4
2
1
8
10
6
9
4
6
x̅=4
Y=6
SSx =
40
SSy=54
Q1: What is the regression line? Y hat = __________
Q2: Compute SS residual....

Show full work and write in complete sentences
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please state in complete sentence
A researcher studied three computer keyboard designs. Three
samples of individuals were given material to type on a particular
keyboard, and the number of errors committed by each participant
was recorded. Are there significant differences in typing
performance among the three keyboard designs?
Keyboard A Keyboard
B Keyboard C
0
6
6
4
8 5
0 5
9
1
...

Dr. Smith was interested in examining if weekly exercise would
produce a change in the stress levels among individuals in the
population. In general population of college students, scores on a
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On the following random samples of social class, test the null
hypothesis that neighborliness does not vary by social class.
(Note: Higher scores indicate greater neighborliness.) ANS:
F =2.72 (observed); 3.49 (critical), df = 3, 12 .05
LOS.
Lower
Working
Middle
Upper
8
7
6
5
4
3
5
2
7
2
5
1
8
8
4
3
State the research...

Please state the null and alternative hypotheses both in written
form and in statistical equation form for the following case:
Bulter Trucking Company
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1. For the question below, please do the
following:
a) State the null and alternative hypotheses. (3
pts)
b) Fill in the ANOVA table (Show work to receive full
credit. At minimum you must show the formula and what values are
substituted in for each element of the formula along with your
final answer. You many use Excel to obtain the sums and squared
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each)
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1. A researcher wants to investigate the relationship between 3
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ascertains how many words that child knows. The data is as
follows:
Participant
Hours watching sesame street per week
words known
A
8
200
B
10
210
C
4
270
D
2
250
E
4
310
F
7
309
G
3
275
H
5
290
I
6
342
b....

PUBH 6033—Week 5 Assignment:
Steps to Hypotheses Testing
Instructions
For this Assignment, review this week’s Learning Resources,
including the 5 step approach to hypothesis testing document. Read
the research scenario, below, and then answer the questions related
to the steps that must be followed to make the appropriate decision
as to reject or fail to reject the null hypothesis.
Submit this Application Assignment by Day
7.
---------------------------------------------------------------------------------------------------------------------
Research Scenario
Hemoglobin levels (g/dL) from the general population of adult
men form...

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