A survey of 10 students was conducted to investigate the amount of time they spend on social media each day. Students were given a timer and asked to record the number of minutes spent every time they accessed social media. The students' total times for one day are given below (in minutes).45 57 63 79 84 92 99 105 117 145 A student who was not included in the survey recorded a time of 240 minutes on social media. That value is: a.clearly an erroneous recording. b.inconsistent with these data. c.consistent with these data. d.an outlier. A group of veterinary researchers plans a study to estimate the average number of enteroliths in horses suffering from them. Previous research has shown the variability in the number to be = 2. The researchers wish the margin of error to be no larger than 0.5 for a 99% confidence interval. To obtain such a margin of error, the researchers need at least: a.106 observations. b.54 observations. c.53 observations. d.107 observations.

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Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter7: Percents

Section: Chapter Questions

Problem 4CST

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A survey of 10 students was conducted to investigate the amount of time they spend on social media each day. Students were given a timer and asked to record the number of minutes spent every time they accessed social media. The students' total times for one day are given below (in minutes).

45 57 63 79 84 92 99 105 117 145

A student who was not included in the survey recorded a time of 240 minutes on social media. That value is:

	a.	clearly an erroneous recording.
	b.	inconsistent with these data.
	c.	consistent with these data.
	d.	an outlier.

A group of veterinary researchers plans a study to estimate the average number of enteroliths in horses suffering from them. Previous research has shown the variability in the number to be = 2. The researchers wish the margin of error to be no larger than 0.5 for a 99% confidence interval. To obtain such a margin of error, the researchers need at least:

a.
106 observations.

b.
54 observations.

c.
53 observations.

d.
107 observations.