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A research worker wishes to estimates the mean of a population by using a sufficiently large sample. The probability is 0.95 that the sample mean will not differ from the true mean by more than 25% of the SD. Then the maximum
a. 25
b. 36
c. 47
d. 61
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- In a population of normally distributed scores, = 230 and = 10. Approximately what percentage of random samples of 25 scores would have means with a value in the range 228 to 232? 87 68 31 77Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? For a random sample of tropical cyclones, let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. x 1,004 975 992 935 971 924 y 40 100 65 145 77 154 Use a calculator to verify that x = 5,801, x2 = 5,613,547, y = 581, y2 = 66,495 and xy = 554,778.Compute r. (Round your answer to four decimal places.)r = As x increases, does the value of r imply that y should tend to increase or decrease? Explain your answer.Given our value of r, y should tend to remain constant as x increases.Given our value of r, y should tend to decrease as x increases. Given our value of r, y should tend to increase as x increases.Given our value of r, we can not draw any conclusions for the behavior of y as x increases.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 closest 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.
- I need help on thisIn 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 closest 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. Weather Station January April USE SALT Does this information indicate that the peak wind gusts are higher in January than in April? Use α = 0.01. (Let d = January - April.) (a) What is the level of significance? 1 2 3 4 5 137 120 126 64 78 104 115 102 88 61 State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? Ho: My = 0₁ H₁: 0; two-tailed O Hoi Hd O1 H₁: M O Hot Hd = 0; H₁: O Hot Hd = 0; H₁² = 0; right-tailed 0; right-tailed (b) What sampling…We are to estimate the mean of a population, u. The population variance is o. Both the population mean and varíance are unknown. I have twO suggestions as the estimators shown below, A and A2. Tell which one is better. Show all calculations and arguments. Az=
- Determine whether the value is a discrete random variable, continuous random variable, or not a random variable. a. The square footage of a house b. The weight of a T-bone steak c. The gender of college students d. The exact time it takes to evaluate 27+72 e. The number of light bulbs that burn out in the next week in a room with 10 bulbs f. The time required to download a file from the InternetPlease solve for G, H, and II need help with solving parts 2 l, 3 and 6
- d. For those who do not favor GR, estimate their odds of opposing the DP. e. Compute and interpret the odds f. Invert your odds ratio and interpret.Which of the following expressions represents the number of distinguishable permutations of the letters of the word CONCLUSIONS? 11! 8! C. 11! 2! 2! 2! 2! 11! А. 11! В. С. D. 2! 2! 2!Can a low barometer reading be used to predict maximum wind speed of an approaching tropical cyclone? For a random sample of tropical cyclones, let x be the lowest pressure (in millibars) as a cyclone approaches, and let y be the maximum wind speed (in miles per hour) of the cyclone. x 1004 975 992 935 989 922 y 40 100 65 145 84 153 (c) Use a calculator to verify that x = 5817, x2 = 5,645,135, y = 587, y2 = 67,315 and xy = 561,857. Compute r. (Round your answer to three decimal places.)
