In this problem, assume that the distribution of differences is approximately normal. Note: For degrees of freedom d.f. not in the Student's t table, use the dlosest d.f. that is smaller. In some situations, this choice of d.f. may increase the P-value by a small amount and therefore produce a slightly more "conservative" answer. at five weather stations on Trail Ridge Road in Rocky Mountain National Park, the peak wind gusts (in miles per hour) for January and April are recorded below. 2 3 4 5 120 126 64 78 102 88 61 Does this information indicate that the peak wind gusts are higher in January than in April? Use a - 0.01. (Let d- January - April.) Weather Station 1 January 135 104 111 April (a) What is the level of significance? State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? O Hoi Ha- 0; H, H> 0; right-tailed O Hoi Ha- 0; H: M < 0; left-tailed O Hại Hg- 0; H, Hg 0; two-tailed O Hại Hg > 0; Hạ: Mg - 0; right-tailed (b) What sampling distribution will you use? What assumptions are you making? O The Student's t. We assume that d has an approximately normal distribution.

please answer number 2 only

Which of the following statements is true? 1. The R (ie., R-squared) tells us the percentage of the variation in the dependent variable (cost) that is explained by variation in the independent variable (activity) II The R (e. R-squared) varies from 0% to 100%, and the lower the percentage, the better the fit of the data to a straight line. ONeither statement is true. Only statement I is true. Only statement II is tru. Both statements are true.

10. The following dot plot shoes the test scores for 10 students on a unit exam. Which shape most accurately describes these data? A. Skewed left B. Skewed right C. Normal Distribution Test Resuits D. Constant + 50 60 70 80 100 Test Score LEGO xx+8 XXxx-

Please show formulas thank tou and on TI-84 calculator A test of H0:ρ=0H0:ρ=0  versus Ha:ρ≠0Ha:ρ≠0  determines that there is evidence of a linear relationship between the variables x and y at the 10% level.  Which of the following is a possible p-value for this test?   The p-value could be any of 0.06, 0.11, 0.82, or 1.15. 0.06 0.11 1.15 0.82 In a sample of 390 people attending a concert, 60% stated that the venue was a good location for that type of concert.  What p-value is calculated when testing  Ho:p≤0.65Ho:p≤0.65  versus p>0.65p>0.65 ?   0.0194 0.0219 0.9808 0.6000 0.0192 A hypothesis test to test the claim about a population mean in which the alternative hypothesis is Ha:μ≠225Ha:μ≠225 is conducted.  A random sample was collected with the results of ¯x=200x¯=200 and s=54.2s=54.2 for a sample of size 14. What are the critical values for this test if the significance level is 5%?   ±2.145 ±1.726 ±2.160 ±1771 ±1.96

#23). Need help solving problem.

i need the answer quickly

Which of the slopes matches best with the slope of the data in the scatter plot? would it be m = 3/8?, m = 8/3?, m = - 3/8? or would it be m = - 8/3???

Please answer the question on the screenshot:

On a scale of 0 to 10, the student rated her enjoyment of stats as an 8. The average rating among students is 5, and the average spread around that mean is 1.5.  I got the z score as 2.0. Can you kindly help with these questions below?   What percent of college students enjoy statistics more? What percent of college students enjoy statistics less?