0.1471 (e) -4.7
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- For the following exercises, use Table 4 which shows the percent of unemployed persons 25 years or older who are college graduates in a particular city, by year. Based on the set of data given in Table 5, calculate the regression line using a calculator or other technology tool, and determine the correlation coefficient. Round to three decimal places of accuracyUse the table of values you made in part 4 of the example to find the limiting value of the average rate of change in velocity.Find the intensities of earthquakes whose magnitudes are (a) R=6.0 and (b) R=7.9.
- The acceptable level for insect filth in a certain food item is 5 insect fragments (larvae, eggs, body parts, and so on) per 10 grams. A simple random sample of 50 ten-gram portions of the food item is obtained and results in a sample mean of x = 5.3 insect fragments per ten-gram portion. Complete parts (a) through (c) below. H = 5 (Round to three decimal places as needed.). o: = 0.316 (Round to three decimal places as needed.) (c) What is the probability a simple random sample of 50 ten-gram portions of the food item results in a mean of at least 5.3 insect fragments? P(x2 5.3) = (Round to four decimal places as needed.)A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three year period. Single Policyholders Married Policyholders n1 597 n2 = 780 %3D Number making claims 89 Number making claims 115 a. Use a = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value (to 2 decimals) p-value (to 4 decimals) We - Select your answer - v that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number.First, gently shade this area in on your curve, then calculate your z scores for X = 47 and for X = 48. %3D I find it handy to use these little tables: Body or tail? Area from Unit Normal Table 47 - 46/1.50 = 48 - 46/1.50%3= For THIS problem, which answer below shows the Area for the first (top) number and the second (bottom) number? .7486 (top): .9082 (bottom) 2514 (top); .0918 (bottom) O.9332 (top); .0668 (bottom) O.0918 (top); .2514 (bottom)
- Newly purchased tires of a particular type are supposed to be filled to a pressure of 30 psi. Let u denote the true average pressure. A test is to be carried out to decide whether u differs from the target value. Determine the P-value for each of the following z test statistic values. (Round your answers to four decimal places.) n USE SALT (a) 2.17 (b) -1.73 (c) -0.59 (d) 1.49 (e) -4.1 You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? Watch It Master ItThe data found below measure the amounts of greenhouse gas emissions from three types of vehicles. The measurements are in tons per year, expressed as CO2 equivalents. Use a 0.025significance level to test the claim that the different types of vehicle have the same mean amount of greenhouse gas emissions. Based on the results, does the type of vehicle appear to affect the amount of greenhouse gas emissions? Determine the test statistic. F= (Round to two decimal places as needed.) Identify the P-value. P-value= (Round to two decimal places as needed.) What is the conclusion of the test? the null hypothesis. Conclude that the type of vehicleappear to affect the amount of greenhouse gas emissions for these three types.Assume that z is the test statistic. (Give your answers correct to two decimal places.) (c) Calculate the value of z for H,: u = 18.2, o = 3.7, n = 137, x = 19.01. (d) Calculate the value of z for H.: u = 81, o = 13.2, n = 46, x = 78.7. %3D
- Find the indicated critical value. z0.01 Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... z0.01=nothing (Round to two decimal places as needed.)Newly purchased automobile tires of a certain type are supposed to be filled to a pressure of 30 psi. Let ? denote the true average pressure. Find the P-value associated with each of the following given z statistic values for testing H0: ? = 30 versus Ha: ? 30 when ? is known. (Give the answers to four decimal places.) (a) z = 2.35 (b) z = -1.65 (c) z = 0.51 (d) z = 1.29 (e) z = -5.75Newly purchased tires of a particular type are supposed to be filled to a pressure of 30 psi. Let u denote the true average pressure. A test is to be carried out to decide whether u differs from the target value. Determine the P-value for each of the following z test statistic values. (Round your answers to four decimal places.) In USE SALT (а) 2.17 (b) -1.77 (с) —0.59
