Identify and interpret the p-value for the test

Reference no: EM13995558

1. Before installing a high-tech laser exhibit near the exit area, a museum of American technology found the average contribution by patrons was $2.75 per per- son. For a sample of 30 patrons following installation of the new exhibit, the contributions are as listed in data file XR10108. Based on the sample data, and using the 0.025 level of significance, can we conclude that the new exhibit has increased the average contribution of exhibit patrons? Identify and interpret the p-value for the test.

2. According to the U.S. Department of Justice, 25% of violent crimes involve the use of a weapon. We will assume that data file XR10109 contains a sample of the crime information for a given city, with data for the 400 crimes coded as 1 5 crime involved a weapon and 2 5 crime did not involve a weapon. Using the 0.05 level in a two-tail test, was the percentage of violent crimes involv- ing a weapon in this city significantly different from the 25% in the nation as a whole? Identify and interpret the p-value for the test. Source: Bureau of the Census, Statistical Abstract of the United States 2009, p. 194.

Reference no: EM13995558

Questions Cloud

Importance of the general acceptance of an expert testimony : Which of the following focuses on the importance of the general acceptance of an expert's testimony, emphasizing its relevance

Standard version of an instructional booklet : A maintenance supervisor is comparing the standard version of an instructional booklet with one that has been claimed to be superior. An experiment is conducted in which 26 technicians are divided into two groups, provided with one of the booklets

Confidence interval for difference between population means : Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes? Construct and interpret the 90% confidence interval for the difference between the population means.

Findings of the hypothesis test : Is the hypothesized propor- tion (0.25) within the interval? Given the presence or absence of the 0.25 value within the interval, is this con- sistent with the findings of the hypothesis test conducted in Exercise 10.109?

Identify and interpret the p-value for the test : Based on the sample data, and using the 0.025 level of significance, can we conclude that the new exhibit has increased the average contribution of exhibit patrons? Identify and interpret the p-value for the test.

Sample of phipps bulbs : Because its fixtures are attached to the ceiling, the bulbs are rather cumbersome to replace, and Shop-Mart is looking into the possibility of switching to Phipps bulbs, which cost the same. A sample of Phipps bulbs lasted an average of 2080 hours..

Constructing the power curve for the test : Use the decision rule associated with part (a) and a range of selected assumed values for µ in constructing the power curve for the test.

How much charge would capacitor with pyrex dielectric hold : When you connect the capacitor with the paper dielectric to the battery, you find that it holds 4.4 nC of charge. How much charge would the capacitor with the Pyrex dielectric hold when you connect it to the same battery? Pyrex dielectric constant ..

Mean amount of weight lost by members : A national chain of health clubs says the mean amount of weight lost by members during the past month was at least 5 pounds. Skeptical of this claim, a consumer advocate believes the chain's assertion is an exaggeration.

User Account

All Pages