# Question: q 34 part a using the dataset below calculate the...

###### Question details

**Q. 34**

**Part A**. Using the dataset below, calculate the
covariance and correlation coefficient between X and Y. For ease,
copy and paste the dataset onto your spreadsheet.

X |
Y |

21 |
35 |

24 |
27 |

23 |
31 |

30 |
38 |

22 |
36 |

18 |
40 |

20 |
37 |

26 |
28 |

a.) Covariance = 5.71. Correlation coefficient = -0.32

b.) Covariance = -5. Correlation coefficient = -0.32

c.) Covariance = -5.71. Correlation coefficient = -0.32

d.) None of the above

**Part B.** Refer to the above dataset. Using the
appropriate spreadsheet function, calculate the sample standard
deviation of ONLY variable Y.

a.) 4.78

b.) 4.47

c.) 5.71

d.) None of the above

**Part C.** Refer to the above dataset. Run a
regression on the dataset. What is your conclusion?

a.) Reject H0 because R-square is only 10.2%

b.) Do not reject H0 because R-square is only 10.2%

c.) Do not reject H0 because F is 0.68 and p-value = 0.4406

d.) Reject H0 because b = -0.4082 and p-value = 0.4406

**Part D.** Refer to the above dataset. Give a 95%
confidence interval for the slope parameter.

a.) 15.2482; 71.5273

b.) -1.6177; 0.8014

c.) -0.8257; 0.4406

d.) None of the above