You are performing a right-tailed test. If α=.005α=.005, find the critical value, to three decimal places.

Find the positive critical t -value for a two tailed test with a = answer to 3 decimal places. 0.05 and df = 11. Give your

You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 82%. With H1 : p >> 82% you obtain a test statistic of z=1.203z=1.203. Find the p-value accurate to 4 decimal places.p-value =

Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What was his percentile?

You are conducting a study to see if the accuracy rate for fingerprint identification is significantly more than 90%. With H1 : p > 90% you obtain a test statistic of z =1.867. Find the p-value accurate to 4 decimal places.

Ocean currents are important in studies of climate change, as well as ecology studies of dispersal of plankton. Drift bottles are used to study ocean currents in the Pacific near Hawaii, the Solomon Islands, New Guinea, and other islands. Let x represent the number of days to recovery of a drift bottle after release and y represent the distance from point of release to point of recovery in km/100. The following data are representative of one study using drift bottles to study ocean currents. x days 75 79 35 91 203 y km/100 14.2 19.1 5.8 11.2 35.4 (a) Verify that  Σx = 483,   Σy = 85.7,   Σx2 = 62,581,   Σy2 = 1978.69,   Σxy = 10982.3,  and  r ≈ 0.94895. Σx   Σy   Σx2   Σy2   Σxy   r   (b) Use a 1% level of significance to test the claim  ρ > 0.  (Use 2 decimal places.) t   critical t     (c) Verify that  Se ≈ 4.1118,   a ≈ 0.7378,  and  b ≈ 0.1698. Se   a   b