Chapter 1. Testing Lack of Correlation

true

Stat Tutor

true

Question 1

1:14

Question 1.1

+ncOp5IZnkSqfg7Fdj8wiKq82jj5p2dLXbtuJ9UtYAEudu4q+PkYnmPV3lfUv4phPtpZpFu0b1/U/S8KbRJLZWAVtLCD9L7MSiWRl3+5VNcaZymaVz5BiCVLNgXBfIK3

Correct. The tests are the same.

Incorrect. The tests are the same.

Try again.

Question 2

3:05

Question 1.2

WZWed964O2NqWJMZrDYqFauJNg65R5X7nhqdaEpxnb5kevRqZjjczmzWU7vlHm8LeXmG9UoBYfBr9ILz70zwbkFekqgy436Vsy5SOBdVsFpi2p0pOS5f7DAZCflgIfxCz3KFtfFj+3XZ7DQPcZF1sfCKi4H0bA7spaSdSWnsHdb83Eb0

Correct. This is a correct statement.

Incorrect. This is a correct statement.

Try again.

Question 3

4:07

Question 1.3

CYyE4XzEZLltrZ0jlHZ0ikT/Z/Kfc/Nq2FakTUxbGahPAeLv8zTPgPUuFPfIkDSsZGz8MbVa82zFzFyRbsWIs6+j8beh2+7XmUTxAKLpjulvmkgR3x4lo2knl3THtqaWbQmD3K+fVgu6ZRL6a96Pc/I3QSdSZCfxasdtdChMgzVLvvG/CTzLWMUww+JtH3Gl+KgsvtKOmomjLn7MGby4sq+nkPg=

Correct. Without a measure of variability, we cannot get a P-value. And without a P-value we cannot decide whether to reject H₀.

Incorrect. Without a measure of variability, we cannot get a P-value. And without a P-value we cannot decide whether to reject H₀.

Try again.

Question 4

4:25

Question 1.4

PcD+h5smxLpPXIGkY5tv7blfUUJz+KCh9eI9v0uNFMzWndy9E8k2ci+nmmfSJpWqacyaSS4hpzth4XTMkGISKV1sdH9zLhPwTf/Qob0Wxn2jufUFI93efuiL/TKSW6b75i3spsXO4zp0Z5Yws08MeS4ee2LespAgd9xtapWDI4WbBOiEvGyW3n8U/aFt6HkR2xZRUvzPv60vxITcEGog+aZJCjD4UN+8amcwImZawTl9HhCKnhsg11zWUxYFPDc97gr6kFNRMP03lM5WJ0WdNz1SdB2BQFigyXnnoxpFnvMvPCuCSrWp6BTM9GyTMDiGcbY8ZF662KWo5IcEZQZaqRn9B7/IlXI/41D/+J3p/dHWxBI0UjWnKX+pey0P+Wl1eYn+pAyqOQUA3ggVpbHChRwNC0BIRwwkk4ws500wOGgW1IeLwhrk4U+NdmnuWSTD0sChzQ==

Correct. We do need the means and standard deviations and we do need a linear relationship for correlation, but we don’t need to do prediction.

Incorrect. We do need the means and standard deviations and we do need a linear relationship for correlation, but we don’t need to do prediction.

Try again.

Question 5

4:57

Question 1.5

DOGFT/1szM66Laqub3ug9lbUZM5vw1rhoJdos0yb5TDenqgcTFkzPJ47Kwau1LpsD8JdZd1F9nwoTb+zHguH9uHbqNlntMz1qVQ7hPXP2jR++wrtwjcg0WQm/yYW0mX4uD45fw9MvFzH/Sbm1itG1uk0Xh9+A/MvVzuCv7nbwlDobyyF4Lv9LVNoaQ04/lGgvr754yJ4WsY=

Correct. All inferential procedures have conditions that need to be met, including testing correlation.

Incorrect. All inferential procedures have conditions that need to be met, including testing correlation.

Try again.

Question 6

5:13

Question 1.6

iYl8bAzw1kstys9vnaSJsKzafg3IZ0J0S8zOgO5DXXKQuIcAZYzzkfAzsaU7SPaoqL/CIhhpbKNt9Wc5/13Rn7h270qrxOaNtmdGQJgAoIDoa1kmj4UM7C7IzO1o+INVC2JyYQlwfrhRBJr8Q9wjpCzM018n+SEBrhuVBw==

Correct. Since P-value < 0.0001 is less than α = 0.05, we can reject H₀.

Incorrect. Since P-value < 0.0001 is less than α = 0.05, we can reject H₀.

Try again.

Question 7

5:37

Question 1.7

pFI3yBb+UBYLrCij0QlDPhxAXxzlPtxYHnoOXktRusABIFwENEY8Fd6zyP+6b+GsakN++el1Pd9vApuOElOEs3qUdhi8kwhirEz2ev4J1SloD1U7NdPG93jbj18lINx/

Correct. Since the relationship is significant, the draft was not fair because those with birthdays late in the year were more likely to have a high draft number (i.e., a draft number close to 1.0.)

Incorrect. Since the relationship is significant, the draft was not fair because those with birthdays late in the year were more likely to have a high draft number (i.e., a draft number close to 1.0.)

Try again.