# Standard Deviation, Significance Level

Not what you're looking for?

The management of White Industries is considering a new method of assembling its golf cart.

The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly

time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard

deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we

conclude that the assembly time using the new method is faster?

##### Purchase this Solution

##### Solution Summary

The management of White Industries is considering a new method of assembling its golf cart.

The present method requires 42.3 minutes, on the average, to assemble a cart. The mean assembly

time for a random sample of 24 carts, using the new method, was 40.6 minutes, and the standard

deviation of the sample was 2.7 minutes. Using the .10 level of significance, can we

conclude that the assembly time using the new method is faster?

##### Solution Preview

we can conduct a t-test for the case:

<br>Ho: M=40.6 or the mean assembly time is 40.6 minutes

<br>Ha: M>40.6 or the mean assembly time is ...

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

##### Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.