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a) State the hypotheses.
Ho: p (red)-p (yellow) <=0
Ha: p (red)-p (yellow) >0
(b) State the decision rule and sketch it.
One-tail test with alpha=1%: critical value is z = 2.326
(c) Find the sample proportions and z test statistic.
p-hat(red)= 20/153,348 ; p-hat(yellow) = 4/135,035
For Pooling: p-bar = (20+4)/(153348+135035) = 0.00002.08..
z = [(20/153,348)-(4/135,035)]/√(0.00002... + (0.00002.08)*0.999979/135035)]
= 2.961.
(d) Make a decision.
Test statistic is greater than the critical value. I Reject Ho
(e) Find the p-value and interpret it.
p-value = P(2.960988 < z < 10) = 0.00153
This means that there is a 0.1533% chance that the test would produce stronger evidence that the read had a higher accident rate than yellow.
(f ) If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why?
Yes it is statistically significant. The evidence indicates that yellow paint has helped reduce the number of accidents.
(g) Is the normality assumption fulfilled? Explain.
Yes, p1n1 > 5 , q1n1>5 ;p2n2 > 5 , p2n2 > 5
What else can I help you with?
Which element of the painting is an example of the artist adding his or her own interpretation of a scene from the Ramayana?
Rama is painted the color of blue instead of bieng flesh colored
What is the traditional color for a pole barn?
Pole barns are often stained, instead of painted. When they are painted it's often with white or green trim.
What color was the submarine?
Traditionally subdued colors like flat black, shades of grey, dark colors to minimize visibility. Pink and Yellow only in the movies- though oceanographic subs are painted yellow -lilke construction machines- for maximum visibility.
Which is the best explanation of why school buses are painted yellow?
Visibility and distinction. It's a highly visible colour, and it's distinct in that it is the colour associated with school buses.
If car financing falls though do you have to return the car?
No. Instead, you can drive to Brazil and get it painted a different color.
What material is a squash court made of?
A squash court is typically constructed using a combination of materials, including concrete or plaster for the walls, which are often painted with a specific type of paint to enhance ball visibility. The floor is usually made of hardwood, such as maple, or a synthetic surface designed for optimal grip and shock absorption. The ceilings are often made of materials that allow for good sound acoustics and visibility, such as glass or high ceilings with painted surfaces.
What is the difference between a regular Dodge Ram and a Dodge Ram sport?
The sport has painted bumpers instead of chrome.
Why are towers painted orange and white?
Towers are painted in orange and white rather than red and white..... as the red colour has the highest wavelength but it's specified for the DANGER sign...hence the next longest wavelength colour 'orange' has been chosen....therefore, to increase the visibility of the tower.
Why are towers painted ir orange and white?
Towers are painted in orange and white rather than red and white..... as the red colour has the highest wavelength but it's specified for the DANGER sign...hence the next longest wavelength colour 'orange' has been chosen....therefore, to increase the visibility of the tower.
How are the lines and symbols painted onto a hockey arena?
They are painted onto the floor. Then the floor is covered with ice. Because the lines are under the ice, instead of part of the ice, resurfacing the ice won't remove the lines.
Can felt be painted on?
Not easily. You can't get a clean line becaue of the nap. I would suggest you use a stamping technique instead.
What comedy about astronauts had one who did not sleep during the flight and instead painted with all the food It was kind of like biodome but on a spaceship?
"Rocketman"
