4. At Burnt Mesa Pueblo, the method of tree-ring dating gave the following years for an archaeological excavation site 1189 Find and s 1271 1267 1272 1268 1316 1275 1317 1275 a br Find a 75% confidence interval for the population average weight of all adult mountain lions in the specified region.
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- All Grace Bo... (1) THE SIYL... Pf ICampuS Login Bb WeeK TI - M... ALEKS Sha... B6 Thread: Wee... O CONFIDENCE INTERVALS AND HYPOTHES. Confidence interval for the... A laboratory in Arizona is imerested in finding the mean chloride level for a healthy resident in the state. A random sample of 90 healthy residents has a mean chloride level of 103 mEq If it is known that the L chloride levels in healthy individuals residing in Arizona have a standard deviation of 42 mEq, find a 95% confidence interval for the true mean L' chloride level of all healthy Arizona residents. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: I Upper limit: I Explanation Check Terms of Uee P Y AccOssibilityQUESTION 2 a) Measurements of the length of a random sample of 200 rods made by a certain machine during one week showed a mean of 0.824m and a standard deviation of 0.042m. Find a 95% confidence interval for the mean length of all the rods. b) Suppose that the diameters of 100 balls in a sports hall represent a random sample of the diameters of all 1546 in the sports hall. Using the table given, determine unbiased and efficient estimates of: i. the true mean. ii. the true variance. Diameters of 100 Balls in the Sports Hall Diameter Number of (inches) Balls 60–62 5 63-65 18 66–68 42 69-71 27 72-74 8 Total = 100 %3Dtion. Use this information to construct the 90% and 95% confidence intervals fc of the confidence intervals. ce of a certain stock was $123.13. Assume the population standard deviation is
- 2. The quartiles of a data set are Q, = 50, Q, = 72, Q, = 110, and Q, = 140. Find the interquartile range. %3D list-of prices is for a used origimi radio fesa 1955 Thunderhird on the condiion of the Taciv.Question 6: a. Identify and explain whether each of the following samples is a possible bootstrap sample from this original sample: 20, 24, 19, 23, 18 a. 24, 18, 23 b. 24, 19, 24, 20,23 peaple are re с. 20, 24, 21, 19, 18 b. A sample of size 46 with a mean of 13.6 is to be used to construct a confidence interval for H. A bootstrap distribution based on 1,000 samples is created. Where will the bootstrap distribution be centered? a. 46 b. 13.6 С. И d. 1,000 C. A sample of n= 10 Illinois gas stations had an average price of $3.975 per gallon. The national average at this time was $3.63. If we want to use the sample data to construct a 95% confidence interval for the average gas price in Illinois, where would the bootstrap distribution be centered? decimal а. 3.63 b. 3.80 C. 3.975 d. 10a.) Calculate the sample correlation coefficient r. Using technology, find the following (show your work by copying and pasting your output and by writing up your finding):b.) The multiple regression equation for the data shown in the table abovec.) The standard error of estimate.d.) The coefficient of determinatione.) What is the percentage of explained variation?f.) What is the percentage of unexplained variation?
- Suppose the method of tree ring dating gave the following dates A.D. for an archaeological excavation site. 1245 1245 1321 1191 1295 1330 1239 1250 1228 Find a 98% confidence interval for the mean of all tree ring dates from this archaeological site.Based on the following calculator output, determine the inter-quartile range of the dataset. (Calculator output in picture provided)Question 6 of 10 Find a 99% confidence interval for the population mean for the data set (120, 80, 83, 115, 95, 90, 75, 145, 130, 105, 118, 78, 86, 113, 98, 93, 79, 147, 136, 108). OA. (90.17, 119.23) O B. (100.43, 108.97) C. (99.97, 105.43) OD. (94.07, 115.33) O E. (90.32, 119.08)
- Estimate the sample size needed of water samples so that a 95% confidence interval will have a margin of error of 0.03. Assume that the population standard deviation is 0.36 ppb. Question 9 options: n = 553 n = 23 n = 554 n = 24Question 5: The highway department wants to estimate the proportion of vehicles on the interstate 605 between the hours of midnight and 5 AM that are 18 - wheel trailers. The estimate will be used to determine highway repair and construction considerations. Suppose researchers for the highway department counted vehicles at different locations on the interstate for several nights during this time period. Of the 3481 vehicles counted, 1027 were 18 - wheelers.  construct a 95% confidence interval for the proportion of vehicles traveling the interstate 605 during this time period that are 18 - wheelers. Questions 9 to 10 refer to the following data. For a random sample of 12 offenders convicted of weapons violations, the length of prison sentence in months was recorded as: 6 6 12 36 48 60 24 24 20 18 15 From the estimation of the population mean of the sentence in month with a 99% confidence interval, what is the upper limit? (Round off to two decimal places if necessary).