Question

In: Statistics and Probability

Data suggest that 232 male deaths from lightning strikes and 55 female deaths from lightning strikes...

Data suggest that 232 male deaths from lightning strikes and 55 female deaths from lightning strikes occur, assume that this data is randomly selected and proceed to construct a 95% confidence interval estimate of the proportion of males among all lightning deaths. based on the result does it seem feasible that males and females have equal chances of being killed by lightning.

and what is the Confidence Interval?

Solutions

Expert Solution

Solution :

Given that,

n = 232

x = 55

= x / n =55 /232 = 0.237

1 - = 1 - 0. 237= 0.763

At 95% confidence level the z is ,

= 1 - 95% = 1 - 0.95 = 0.05

/ 2 = 0.05 / 2 = 0.025

Z/2 = Z0.025 = 1.96

Margin of error = E = Z / 2 * (( * (1 - )) / n)

= 1.96 * (((0.237 * 0.763) / 232) = 0.0547

A 95% confidence interval for population proportion p is ,

- E < P < + E

0.237 - 0.0547 < p < 0.237 + 0.0547

0.1823< p < 0.2917

The 95% confidence interval for the population proportion p is : ( 0.1823 , 0.2917)

orchestra answered 2 years ago
Next > < Previous

Related Solutions

Data suggest that 232 male deaths from lightning strikes and 55 female deaths from lightning strikes...
Data suggest that 232 male deaths from lightning strikes and 55 female deaths from lightning strikes occur, Assume that this data was randomly selected and proceed to test the claim that the proportion of male deaths is greater than 50% use 0.01 significance level A) Claim, Null hypothesis, Alternative Hypo B) Solve using the P-value approach C) solve using the classical approach D) Summary
1. A university has 10,000 students of which 45% are male and 55% are female. If...
1. A university has 10,000 students of which 45% are male and 55% are female. If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students. Group of answer choices Mean = 16.5, Variance = 2.7 Mean = 13.5, Variance = 2.7 Mean = 16.5, Variance = 7.4 Mean = 13.5, Variance = 7.4 2. At a particular hospital, 40% of staff are nurse assistants. If...
In Africa in 2011, the number of deaths of a female from cardiovascular disease for different...
In Africa in 2011, the number of deaths of a female from cardiovascular disease for different age groups are in the table below ("Global health observatory," 2013). In addition, the proportion of deaths of females from all causes for the same age groups are also in table below. Table: Deaths of Females for Different Age Groups Age 5-14 15-29 30-49 50-69 Total Cardiovascular Frequency 8 16 56 433 513 All Cause Proportion 0.10 0.12 0.26 0.52 Do the data show...
Before 1918, approximately 55% of the wolves in a region were male, and 45% were female....
Before 1918, approximately 55% of the wolves in a region were male, and 45% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 70% of wolves in the region are male, and 30% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.) (a) Before 1918,...
The following data summarizes a study of online expenditures of groups of male and female customers...
The following data summarizes a study of online expenditures of groups of male and female customers for a particular web store. The population variances are known to be equal.   (5)Test whether the average expenditures of men are higher than women using alpha 0.10. (5) Test that the standard deviation of male customers is more than $94. Use alpha = 0.10. MALE FEMALE Sample mean $352 $310 Sample standard deviation $95 $80 Sample size 13 16
You mate a male from a true-breeding strain of dwarf mice to a female from a...
You mate a male from a true-breeding strain of dwarf mice to a female from a true-breeding normal-sized strain. The F1 mice are all normal in size. What would the phenotypes of the F1 and F2 mice be in the reciprocal of the above cross if the dwarf character is caused by a mitochondrial genome defect?
Generate comparative boxplots for: Male data between 2000 and 2015, Female data between 2000 and 2015,...
Generate comparative boxplots for: Male data between 2000 and 2015, Female data between 2000 and 2015, Both Sexes data between 2000 and 2015 Using the data from 2000, estimate the mean adult mortality rates for male, female and both sexes for the world population with 95% confidence. Using the data from 2015, estimate the mean male, female and both sexes adult mortality rates for the world population with 95% confidence. Estimate the mean difference (with 95% confidence) between: Male adult...
Make sure the data is sorted by category (male-at-rest, female at-rest, etc.). Use the Data Analysis...
Make sure the data is sorted by category (male-at-rest, female at-rest, etc.). Use the Data Analysis tools of Excel to construct 95% and 99% confidence intervals for all 8 categories of the sorted quantitative variables. Excel will calculate the margin of error given as the “confidence interval” in the output. Use this margin of error to create your 8 confidence intervals by both adding and subtracting it from the sample mean (calculated in unit 3). This creates a range of...
Take your survey data and code the gender question as Male= 0 and Female = 1....
Take your survey data and code the gender question as Male= 0 and Female = 1. Suppose we hypothesize that women are more likely to respond to surveys than men are. Specifically, we believe that more than 55 percent of all respondents are women which equates to the proportion of the gender variable to be greater than 0.55. Test the hypothesis. Females= 24 Males= 9 Provide the 6 step process of testing the hypothesis. Present your results and discuss why...
In Milwaukee, they randomly sampled 280 female voters, and 220 male voters. They collected data on...
In Milwaukee, they randomly sampled 280 female voters, and 220 male voters. They collected data on the respondent's opinion on building a new sports stadium. We want to know whether there is good evidence that one's gender influences whether a person is for or against the new stadium. Use αα = 0.05. For Bond Issue Against Bond Issue Total Men 77 203 280 Women 14 206 220 Total 91 409 500 a) What is the correct null hypothesis? HoHo: p1=p2=p3=p4p1=p2=p3=p4...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT