A House Cleaning Service Claims That It Can Clean a Four

question 104

Multiple Choice

A house cleaning service claims that it can clean a four bedroom house in less than 2 hours. A sample of n = 16 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1 hours. Using a 0.05 level of significance the correct conclusion is:

• A) reject the null because the test statistic (-1.2) is < the critical value (1.7531).
• B) do not reject the null because the test statistic (1.2) is > the critical value (-1.7531).
• C) reject the null because the test statistic (-1.7531) is < the critical value (-1.2).
• D) do not reject the null because the test statistic (-1.2) is > the critical value (-1.7531).

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Definitions:

Recommendations

Suggestions or advice given based on analysis or expertise aimed at guiding decisions or actions.

Buffer

In communication, a neutral or positive statement used to mitigate the impact of a following negative message.

Indirect Approach

A communication strategy that addresses the main point or request after providing background information, often used to soften the impact.

Opening

The initial part or phase of an event, activity, or period of time, often setting the tone for what follows.