Q1)

Find the curve of second degree of regression of y on x () to the following data by method of least square :

x | 1 | 2 | 3 | 4 |

y | 6 | 11 | 18 | 27 |

Q2) Explain the concept of confidence interval with suitable example.

Q3) Fit a least square linear approximation Y=a+bX for the data X: -1, 0, 1, 2, 3 and Y: 0, 1, 2 , 9, 29

Q4) A random sample of 900 member has a mean 3.4cms. Can it be reasonably regarded as a sample from a large population of mean 3.2cms and S.D. 2.3cms??

Q1)Find the curve of second degree of regression of y on x () to the following data by method of least square :

Answer: Click here for answer –> curve of regrresionQ2) Explain the concept of confidence interval with suitable example.

Answer:click here to download answer—-> confidence intervalQ3) Fit a least square linear approximation Y=a+bX for the data X: -1, 0, 1, 2, 3 and Y: 0, 1, 2 , 9, 29

Answer:Follow the below linkQ4) A random sample of 900 member has a mean 3.4cms. Can it be reasonably regarded as a sample from a large population of mean 3.2cms and S.D. 2.3cms??

Answer:Follow the below link