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Providde a 95% conffidence interrval esstimate for the true averrage call durration. Hinnt: Use poppulation std instead of sammple std whenever poppulation std is given. That is to use σ=2 instead of s = 2.37901.  A. 6.1478 ± 1.645 × 2.37901 / √100 B. 6.1478 ± 2 C.6.1478 ± 1.96 × 2.37901 / √100 D. 6.1478 ± 1.645 × 2 / √100 E. 6.1478 ± 1.96 × 2 / √100 We colllected a sammple of 100 telepphone callls. If we waant to cutt the margin of error in half (meaning that we wantt to redduce the margin of errror to 50% of yourr answer in Part 3), how largge of sammple is needed? Assume a 90% confidence level. A. n = (1.96 × 2 / 0.329)^2 B. n = (1.96 × 2 / 0.1645)^2 C. n = (1.645 × 2 / 0.329)^2 E. n = (1.645 × 2 / 0.1645)^2

Providde a 95% conffidence interrval esstimate for the true averrage call durration. Hinnt: Use poppulation std instead of sammple std whenever poppulation std is given. That is to use σ=2 instead of s = 2.37901.  A. 6.1478 ± 1.645 × 2.37901 / √100 B. 6.1478 ± 2 C.6.1478 ± 1.96 × 2.37901 / √100 D. 6.1478 ± 1.645 × 2 / √100 E. 6.1478 ± 1.96 × 2 / √100 We colllected a sammple of 100 telepphone callls. If we waant to cutt the margin of error in half (meaning that we wantt to redduce the margin of errror to 50% of yourr answer in Part 3), how largge of sammple is needed? Assume a 90% confidence level. A. n = (1.96 × 2 / 0.329)^2 B. n = (1.96 × 2 / 0.1645)^2 C. n = (1.645 × 2 / 0.329)^2 E. n = (1.645 × 2 / 0.1645)^2

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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Providde a 95% conffidence interrval esstimate for the true averrage call durration. Hinnt: Use poppulation std instead of sammple std whenever poppulation std is given. That is to use σ=2 instead of s = 2.37901. 

A. 6.1478 ± 1.645 × 2.37901 / √100
B. 6.1478 ± 2
C.6.1478 ± 1.96 × 2.37901 / √100
D. 6.1478 ± 1.645 × 2 / √100
E. 6.1478 ± 1.96 × 2 / √100
We colllected a sammple of 100 telepphone callls. If we waant to cutt the margin of error in half (meaning that we wantt to redduce the margin of errror to 50% of yourr answer in Part 3), how largge of sammple is needed? Assume a 90% confidence level.
A. n = (1.96 × 2 / 0.329)^2
B. n = (1.96 × 2 / 0.1645)^2
C. n = (1.645 × 2 / 0.329)^2
E. n = (1.645 × 2 / 0.1645)^2
Summary Statistics for Duration Count Average Median Mode Variance Standard deviation 2.37901 Minimum Maximum Range Lower quartile Upper quartile Interquartile range 3.235 100 6.1478 6.085 5.65968 |-1.48 10.7 12.18 4.805 8.04
Transcribed Image Text:Summary Statistics for Duration Count Average Median Mode Variance Standard deviation 2.37901 Minimum Maximum Range Lower quartile Upper quartile Interquartile range 3.235 100 6.1478 6.085 5.65968 |-1.48 10.7 12.18 4.805 8.04
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