The following observations are lifetimes (days) subsequent to diagnosis for individuals suffering from blood cancer. 115 181 256 419 442 461 517 739 744 789 807 866 924 984 1025 1063 1064 1165 1192 1222 1222 1252 1277 1291 1358 1369 1409 1455 1479 1519 1578 1578 1599 1603 1605 1697 1735 1799 1815 1852 1899 1926 1965 Calculate and interpret a confidence interval with a 99% confidence level for true average lifetime. [Hint: x = 1192.0 and s = 506.5.] (Round your answers to one decimal place.) (_____,_____)

The following observations are lifetimes (days) subsequent to diagnosis for individuals suffering from blood cancer. 115 181 256 419 442 461 517 739 744 789 807 866 924 984 1025 1063 1064 1165 1192 1222 1222 1252 1277 1291 1358 1369 1409 1455 1479 1519 1578 1578 1599 1603 1605 1697 1735 1799 1815 1852 1899 1926 1965 Calculate and interpret a confidence interval with a 99% confidence level for true average lifetime. [Hint: x = 1192.0 and s = 506.5.] (Round your answers to one decimal place.) (_,_)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Fill in the blank. A random sample of 25 roundtrip flights between Philadelphia and Dallas has an average airfare of $393.50 with a sample standard deviation of $50.30. The 95% confidence interval around this sample mean is Round to two decimal places as needed. ... A. ($372.74, $414.26) B. ($388.47, $398.53) OC. ($383.44, $403.56) O D. ($353.26, $433.74)
The heart rates for a group of 17 students taking a final exam are given below. Assume heart rates are normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to find the 95% confidence interval for the true population mean. Round your answers to two decimal places and use increasing order. Beats per minute 92 101 93 89 93 89 92 95 86 93 96 93 96 87 94 97 101
The trade volume of a stock is the number of shares traded on a given day. A random sample of trading days from the past year is selected, and the volume of PepsiCo stock, in millions of shares, is recorded for each day. A normality test is performed on the resulting data, producing the output below. Based on this sample, construct a 99% confidence interval for the mean daily trade volume of PepsiCo during the past year. Percent 99 95 90 80 70 60- 50- 40 30 20- 10 5- -3 • 4 Probability Plot of PepsiCo Volume Normal 5 6 7 8 PepsiCo Volume 9 10 11 Mean StDev N AD P-Value 5.864 1.148 38 0.822 0.031
Refer to the accompanying data set and construct a 95% confidence interval estimate of the mean pulse rate of adult females; then do the same for adult males. Compare the results. Click the icon to view the pulse rates for adult females and adult males. Pulse Rates Pulse Rates (beats per minute) 84 76 50 61 53 63 52 74 55 63 75 60 62 77 82 64 69 94 41 88 Males 74 63 75 71 57 66 55 80 75 63 63 97 60 63 57 58 65 73. 82 56 4 Print Females 79 92 60 68 56 81 77 85 88 58 37 63 87 77 81 63 67 80 58 62 82 82 71 76 88 92 89 91 91 97 66 92 80 78 72 53 102 73 76 74 Done - X
A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 191 milligrams. Assume that o = 16.2 milligrams. Construct a 95% confidence interval for the true mean cholesterol content, µ, of all such eggs. Round to one decimal place. O A. 186.9 to 195.1 milligrams B. 186.5 to 195.5 milligrams C. 188.1 to 193.9 milligrams D. 187.6 to 194.4 milligrams
Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities in a country. Construct a 95% confidence interval. What does the result tell us about the population of all celebrities? Do the data appear to be from a normally distributed population as required? 245 210 186 168 166 163 156 156 156 156 What is the confidence interval estimate of the population mean μ? $enter your response here million<μ<$enter your response here million (Round to one decimal place as needed.) What does the result tell us about the population of all celebrities? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. A. We are 95%confident that the interval from $enter your response here million to $enter your response heremillion actually contains the true mean net worth of all celebrities. (Round to one decimal place as needed.) B.…
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Calculate the margin of error, E, for a 99% confidence interval for µ, the average annual salary of all high school teachers. A. $ 1846.3 B. $ 1652.1 C. $ 1488.6 D. $ 1423.8
The table contains pulse rates collected from males, who are non-smokers but do drink alcohol. The before pulse rate is before they exercised, and the after pulse rate was taken after the subject ran in place for one minute. Compute a 90% confidence interval for the mean difference in pulse rates from before and after exercise. Round to two decimal places. Pulse Rate of Males Before and After Exercise Pulse before 49 89 51 51 73 75 74 65 50 66 53 89 58 87 52 49 85 68 60 Pulse after 94 141 81 91 157 125 106 79 66 156 89 130 101 134 130 72 112 123 97 % confidence, it can be said that the mean difference in pulse rates from % and With before and after exercise is between %.
Figure 1 shows the no. of Australian tourist arrivals to Malaysia from the year 2010 to 2019. 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 0.58 0.56 0.51 0.53 0.57 0.49 0.38 0.35 0.35 0.37 Figure 1: Average no. of Australian tourist arrivals to Malaysia per year Based on the data in Figure 1, construct a 95% confidence interval to estimate the mean no. of Australian tourist arrivals per year to Malaysia. 2. Based on the data in Figure 1, at 0.05 level of significance, can we claim that in general, the mean no. of Australian tourist arrivals per year to Malaysia is lower than 4 million. Use the critical value approach. 3. Compare the result in 1(a) and 1(b) and make your final conclusion.
A certified mechanic was timed for the repair of an automobile on 14 separate occasions.Over the same period, a trainee mechanic was timed for the repair of a similar automobile.The times in minutes are given belowCertified 344 276 257 334 267 164 222 343 212 175 211 311 209 188Trainee 222 342 178 234 398 232 377 211 309 190 351 343 177 269a. Calculate a 99% confidence interval for the mean time taken to repair the automobile by the (i) certified mechanic and (ii) the trainee mechanic. b. Test the hypothesis that the two mean times for both mechanics are equal. Use the 5% level of significance. c. Subsequently, it was learned that the times for the trainee were incorrectly recorded and that each of the values above is 30 minutes too small. What, if any, the difference does this make to the results of the test done in part (d)?
An article contained the following observations on degree of polymerization for paper specimens for which viscosity times concentration fell in a certain middle range: 415 421 422 423 425 427 430 435 437 439 446 446 448 453 456 463 464 Calculate a two-sided 95% confidence interval for true average degree of polymerization.(Round your answers to two decimal places.)
Measurements of the speed of light are given in the table. Estimate the speed of light using a 90% confidence interval. Round to the nearest whole number. Speed of Light Measurements (km/sec) 299755 299716 299763 299839 299880 299777 299916 299716 299689 299731 299810 299870 299604 299708 299807 With 90 299709 299679 299571 299670 299513 299715 299664 299918 299897 O % confidence, it can said that the speed of light is between and 299.787 X

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