Answered

Westonci.ca offers quick and accurate answers to your questions. Join our community and get the insights you need today. Get detailed and precise answers to your questions from a dedicated community of experts on our Q&A platform. Experience the convenience of finding accurate answers to your questions from knowledgeable experts on our platform.

Spatial perception is measured on a scale from 0 to 10. Two groups of 8th grade children are tested for spatial perception. The students in group 1 were first given a short course on spatial concepts. The students in group 2 received no such instruction. R software was used to calculate descriptive statistics for the two samples. What is the value of the pooled standard error

Sagot :

akiran007

Answer:

Pooled Standard Error      =0.7157

Step-by-step explanation:

The missing data is

                  Mean          n          Std. Deviation      Std. Error

group1      6.89           9            1.269                       0.423

group2     5.33           9            1.732                        0.577

Standard Error= Std. Deviation / √n

First we calculate pooled standard deviation from the pooled variance formula

Sp²= (n1 – 1)* (s1)² + (n2 – 1) *(s2)²/(n1 + n2 – 2)

      = 8*(1.269)² + 8 (1.732)²/ ( 9+9-2)

      = 12.882888 + 23.998592/16

      =2.3050925

Sp = √ 2.3050925 =1.51825

Pooled Standard Error = Sp *sqrt(1/n1 + 1/n2)

                                       =1.51825 *(0.4714)

                                         =0.7157

Thank you for your visit. We are dedicated to helping you find the information you need, whenever you need it. Thank you for your visit. We're dedicated to helping you find the information you need, whenever you need it. Westonci.ca is your go-to source for reliable answers. Return soon for more expert insights.