Samiha believes that for city driving, the fuel economy of c…

Samiha believes that for city driving, the fuel economy of compact, midsize, and large cars are the same. The gas mileages (in miles per gallon) for city driving for several randomly selected cars from each category are shown in the table at the right. Assume that the populations are normally distributed. At α = 0.05, can you reject the claim that the mean gas mileages for city driving are the same for the three categories? Compact Midsize Large 12 21 18 23 23 17 17 19 15 20 14 17 25 14 20 18 21 17 24 26 17 27 18 13 29 25 17 16 31 27 24 22 24 21 25 21 Just check if the 4 conditions for an ANOVA test are met.  Do not perform the full hypothesis test.

Kayleen gathered the following data representing the diamete…

Kayleen gathered the following data representing the diameter in centimeters of a random sample of 12 Douglas firs in the western Washington Cascades. Assuming the sample below comes from a population that is normally distributed, construct and interpret a 98% confidence interval for the standard deviation diameter of a Douglas fir tree in the western Washington Cascades. 152, 190, 147, 173, 159, 131, 162, 135, 107, 147, 113, 109   < <   Remember that you must show all work for this problem in your uploaded work at the end of the exam!

Sophia wants to learn whether the amount of prenatal care an…

Sophia wants to learn whether the amount of prenatal care and wantedness of the pregnancy are associated. She randomly selects 939 women who had recently given birth and asks them to disclose whether their pregnancy was intended, unintended, or mistimed. In addition, they were to disclose when they started receiving prenatal care, if ever. The results were as follows. The researcher claims that prenatal care and wantedness of pregnancy are dependent. Test her claim at α = 0.01 level of significance. Months Less than 3 months 3-5 months more than 5 months Intended 593 26 33 Wantedness Unintended 64 8 11 Mistimed 169 19 16 State your hypotheses and label the claim.  H₀: and are   H₁: and are   Claim: Find the level of significance: = Compute the expected values Less than 3 months 3-5 months more than 5 months Intended Unintended Mistimed Check the necessary conditions. Estimate the p-value, being sure to specify what you entered in your calculator. (round to 6 decimal places this time only): p-value= Determine whether or not to reject the null hypothesis and explain/show why. Give a clear conclusion.    Remember that you must show all work for this problem in your uploaded work at the end of the exam.  This includes all parts above, whether they had a space to enter an answer or not!

Compare your testing video to Mr. Roncone’s testing setup in…

Compare your testing video to Mr. Roncone’s testing setup in this photo.   Part 1: Can you see your head, screen, keyboard, hands, and both sides of your workspace, as you can in the photo of Mr. Roncone?  If not, adjust your camera now.  You can move your camera further away from you, to the side of your body at the 8 o’clock or 4 o’clock position, to get a wider view.   Part 2: Once your camera is positioned correctly, place both of your hands on your desk/table at either side of your workspace. Tap your desk/table as if you are “playing the drums”. Can you see BOTH of your hands on BOTH sides of your keyboard in your camera view?   YES | I can see both of my hands on both sides of my computer.  This means my camera properly shows both sides of my workspace.   NO | I can’t see both of my hands.  Try to correct your setup by moving your camera farther away from your computer, at 8 o’clock or 4 o’clock, until you can see both hands.  If you get stuck, close this quiz and reach out to a Dwight Global Honorlock Specialist for assistance.