interval esum 0.53 0.79 0.10 0.87 1.35 0.58 0.96 What is the confidence interval estimate of the population mean μ? ppm<μ<
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- Cell Phone Call Lengths The average local cell phone call length was reported to be 2.39 minutes. A random sample of 24 phone calls showed an average of 2.83 minutes in length with a standard deviation of 0.9 minutes. At =α0.01, can it be concluded that the average differs from the population average? Assume that the population is approximately normally distributed. a. State the hypotheses and identify the claim H0= (claim or not claim) H1= (claim or not claim) This hypothesis test is a (one tailed or two tailed) test Critical value(s)= t= (Reject or do not reject) the null hypothesis is there enough evidence to support the claim?An electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with a standard deviation of 30 hours. How large a sample is needed if we wish to be 98% confident that our sample mean will be within 10 hours of the true mean? The required sample size is_______ (Round up to the nearest whole number as needed.)Ctivity. IMity Confidence level Critical value 0.90 2* = 1.645 0.95 z* = 1.960 0.99 z* = 2.576 377308.2364912.cx3zcy7 Jump to level 1 A poll for a statewide election has a margin of error of 1.31 percentage point How many oters should be sampled for a 95% confidence interval? Round to the nearest whole number. Ex. 1234 voters
- The Insurance Institute for Highway Safety publishes data on the total damage suffered by compact automobiles in a series of controlled, low-speed collisions. The cost for a sample of 9 cars, in hundreds of dollars, is provided below. 10, 6, 8, 10, 5, 3.5, 7.5, 7,9.5 Find interquartile range for mileage data and value of variance.Q 14?ness Statistics 1 || Spring21 Time left 1:26:29 Suppose that the walting times for patients at a local hospital are normally distributed with a known population standard deviation of 30 minutes. A random sample of 75 patients in the local hospital had a mean time of 90 minutes. Assume a 95% confidence interval for the population mean a. The width of the 95% confidence interval estimate is Oa 11.38 Ob. 13.58 Oc 16.12 Od. 17.86 PAGE NEXT PAGE MAY étv 23
- total plasma volume is important in determining the required plasma component in blood replacement therapy for personal growth and surgery plasma volume is influenced by the overall health and physical activity of an individual suppose that a random sample 43 male firefighters are tested in that they have a plasma volume sample mean of x=37.5 ml/kg assume thqy o=7.20 ml/kg for the distribution of blood plasma Find a 99% confidence interval for the population mean blood plasma volume in male firefighters. What is the margin of error? Lower limit? Upper limit? Round to two decimal placesSlove all question just True or falseNING SYSTEM (ACADEMIC) Time left 1:20:00 Suppose that the waiting times for patients at a local hospital are normally distributed with known population standard deviation of 30 minutes. A random sample of 75 patients in the local hospital had a mean time of 90 minutes. Assume a 95% confidence interval for the population mean u. The lower confidence limit of the 95% confidence interval is O A. 84.32 О В. 81.93 O C. 83.21 O D. 85.57 NEXT PAGE US PAGE edu.om/mod/quiz/attempt.php?attempt=2035071&cmid%3D904570%#
- K Find the critical value Za/2 that corresponds to the confidence level 85%. Zal2 = (Round to two decimal places as needed.) CCalculate the p- value for each of the given hypothesis test scenarios below Round p-values to four decimal places Find the p-value for a left-tailed test of hypothesis for a mean when the test statistic has been calculated as -2.42, Assume the population standard deviation is known p-value Find the p-value for a right-tailed test of hypothesis for a proportion when the test statistic has been calculated as 0.81. p-value = Find the p-value for a two-tailed test of hypothesis for a proportion when the test statistic has been calculated as 1 p-value Find the p-value for a two-tailed test of hypothesis for a mean when the test statistic has been calculated as -2.18. Assume the population standard deviation is known. p -valueConstruct a 90% confidence interval of the population proportion using the given information. x=40, n=200 Question content area bottom Part 1 The lower bound is enter your response here. The upper bound is enter your response here. (Round to three decimal places as needed.)