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9. A trainer decides to do a study because he wants to estimate the population mean completion times for both male and female runners within 1/4 minute (0.25 minute). How many runners of each sex does he need for his study? Determine the minimum sample size required to construct a 99% confidence interval for the population mean completion times of a. male runners. Assume the population standard deviation is 0.64 minutes. b. female runners. Assume the population standard deviation is 1.12 minutes.

9. A trainer decides to do a study because he wants to estimate the population mean completion times for both male and female runners within 1/4 minute (0.25 minute). How many runners of each sex does he need for his study? Determine the minimum sample size required to construct a 99% confidence interval for the population mean completion times of a. male runners. Assume the population standard deviation is 0.64 minutes. b. female runners. Assume the population standard deviation is 1.12 minutes.

College Algebra (MindTap Course List)
College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.7: Probability
Problem 58E: What is meant by the sample space of an experiment?
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9. A trainer decides to do a study because he wants to estimate the population mean completion times for both male and female runners within 1/4 minute (0.25 minute). How many runners of each sex does he need for his study? Determine the minimum sample size required to construct a 99% confidence interval for the population mean completion times of a. male runners. Assume the population standard deviation is 0.64 minutes. b. female runners. Assume the population standard deviation is 1.12 minutes.
Transcribed Image Text:9. A trainer decides to do a study because he wants to estimate the population mean completion times for both male and female runners within 1/4 minute (0.25 minute). How many runners of each sex does he need for his study? Determine the minimum sample size required to construct a 99% confidence interval for the population mean completion times of a. male runners. Assume the population standard deviation is 0.64 minutes. b. female runners. Assume the population standard deviation is 1.12 minutes.
Country Men's Name Time in Minutes GBR Mohamed FARAH 27.09 Tamirat TOLA Galen RUPP Bedan Karoki MUCHIRI Nguse AMLOSOM ЕTH 27.11 USA 27.15 KEN 27.38 ERI 27.51 KEN Geoffrey Kipsang KAMWOROR 27.53 TÜR Polat Kemboi ARIKAN 27.59 ЕTH Abadi HADIS 27.61 JPN Suguru OSAKO 27.87 USA Shadrack KIPCHIRCHIR 27.97 PER Luis OSTOS 28.03 UGA Timothy TOROITICH 28.08 GBR Andrew VERNON 28.32 BDI Olivier IRABARUTA 28.55 JPN Yuta SHITARA 28.92 GBR Ross MILLINGTON 29.25 Country Women's Name Time in minutes ETH Almaz AYANA 29.29 ЕTH Tirunesh DIBABA 29.71 KEN Betsy SAINA 30.13 TUR Yasemin CAN 30.44 NOR Karoline Bjerkeli GROVDAL 31.24 USA Emily INFELD 31.45 BDI Diane NUKURI 31.48 GBR Joanne PAVEY 31.56 GRE Alexi PAPPAS 31.60 Darya MASLOVA Dominique SCOTT KGZ 31.62 RSA 31.86 UAE Alia Saeed MOHAMMED 31.95 CAN Lanni MARCHANT 32.07 ww RWA Salome NYIRARUKUNDO 32.13 ESP Trihas GEBRE www 32.16 BRA Tatiele Roberta DE CARVALHO 32.64 USA Marielle HALL 32.66 МЕX Marisol ROMERO 35.55
Transcribed Image Text:Country Men's Name Time in Minutes GBR Mohamed FARAH 27.09 Tamirat TOLA Galen RUPP Bedan Karoki MUCHIRI Nguse AMLOSOM ЕTH 27.11 USA 27.15 KEN 27.38 ERI 27.51 KEN Geoffrey Kipsang KAMWOROR 27.53 TÜR Polat Kemboi ARIKAN 27.59 ЕTH Abadi HADIS 27.61 JPN Suguru OSAKO 27.87 USA Shadrack KIPCHIRCHIR 27.97 PER Luis OSTOS 28.03 UGA Timothy TOROITICH 28.08 GBR Andrew VERNON 28.32 BDI Olivier IRABARUTA 28.55 JPN Yuta SHITARA 28.92 GBR Ross MILLINGTON 29.25 Country Women's Name Time in minutes ETH Almaz AYANA 29.29 ЕTH Tirunesh DIBABA 29.71 KEN Betsy SAINA 30.13 TUR Yasemin CAN 30.44 NOR Karoline Bjerkeli GROVDAL 31.24 USA Emily INFELD 31.45 BDI Diane NUKURI 31.48 GBR Joanne PAVEY 31.56 GRE Alexi PAPPAS 31.60 Darya MASLOVA Dominique SCOTT KGZ 31.62 RSA 31.86 UAE Alia Saeed MOHAMMED 31.95 CAN Lanni MARCHANT 32.07 ww RWA Salome NYIRARUKUNDO 32.13 ESP Trihas GEBRE www 32.16 BRA Tatiele Roberta DE CARVALHO 32.64 USA Marielle HALL 32.66 МЕX Marisol ROMERO 35.55
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