Question

The supervisor of a certain company claimed that the mean workday of his workers is 8.4hours per day. A sample of 21 workers was taken and it was found out that the mean workday is 8.2 hours with standard deviation of 0.9 hour. At 0.01 level of significance, is the mean workday less than 8.4 hours? What test statistic is to be used in the given problem?
A.t-test
B.left-tailed test
C.z-test
D.right-tailed test​

Answer 1

Answer:

van Schrojenstein Lantman, Marith; Mackus, Marlou; Roth, Thomas; Verster, Joris C|info:eu-repo/dai/nl/241442702

2017-01-01

INTRODUCTION: An evening of alcohol consumption often occurs at the expense of sleep time. The aim of this study was to determine the relationship between total sleep time and the duration and severity of the alcohol hangover. METHODS: A survey was conducted among Dutch University students to

Sociosexuality, Morningness–Eveningness, and Sleep Duration

Directory of Open Access Journals (Sweden)

Christoph Randler

2016-01-01

Step-by-step explanation:

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