### Find mean and standard deviation of proportions

Assignment Help Basic Statistics
##### Reference no: EM13137528

Harley Davidson motorcycles makes up 14% of all motorcycles registered in the US. You plan to interview an SRS of 400 motorcycle owners. What are the mean and standard deviation of the proportions of random samples of 400 motorcylce owners who own Harleys?

#### Questions Cloud

 French system of anti-terrorism : Using outside sources available on the internet or in the online library, research the terrorism policies of Israel, France, and the UK. Hazen-williams formula -find the diameter of a pipe : Hazen-Williams Formula- Find the Diameter of a Pipe, The length of cast-iron pipe is to be 4200 ft., and the head causing flow is to be 12.6ft. After the pipe has been in service 5 years, it is expected to discharge water at a rate equal to 3.2 cf.. What is equity method balance of wilkinsons investment : Dividends of \$70,000 were paid in each of these two years. What is equity method balance of Wilkinsons Investment in Bremm, Inc., at December 31, 2011? Should english be official language of the united states? : Research Topic: Should English be made the official language of the United States? Find mean and standard deviation of proportions : What are the mean and standard deviation of the proportions of random samples of 400 motorcylce owners who own Harleys? What is amount of factory overhead controllable variance : The standard factory overhead rate is \$10 per direct labor hour (\$8 for variable factory overhead and \$2 for fixed factory overhead) based on 100% capacity of 30,000 direct labor hours. Compute annual depreciation : Conlin Company acquires a delivery truck at a cost of \$42,000.The truck is expected to have a salvage value of \$6,000 at the end of its 4-year useful life. Compute annual depreciation for the first and second years using the straight-line method. Analysis of juvenile delinquency-public policy : This is an analystical study of adolescent psychology or what used to be known as "juvenile delinquency from the perspective of public policy, and what the implications of this study has in terms of the community at large. Perspective of utilitarianism : You are required to select ONE company / organisations of your choice and discuss the background, history, product and services of the company in detail. Student is required to get an approval from the lecturer on the organization chosen to avoid sim..

### Write a Review

#### Constructing confidence intervals

A sample of 144 cans of coffee showed an average weight of 16 ounces. The standard deviation of the population is known to be 1.4 ounces.

#### Effects of the central limit theorem

The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?

#### Significance level to test the claim

Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.

#### Sample for a given confidence interval

I have a problem that wants to know the sample size of Illinois republican voters, they want to know the sample size with 95% confidence and 3% margin of error, not sure how to get started.

#### Explain whether to use a one-tailed or two-tailed test

Iindicate what two populations are being compared, (b) state the research hypothesis, (c) state the null hypothesis, and (d) say whether you should use a one-tailed or two-tailed test and why.

#### Sign of correlation coefficient to correlate two variables

What would happen to the size and the sign of the correlation coefficient if we correlated these two variables? How can researchers work around this issue?

#### Determining the mode for distribution

Determine the mode for this distribution. Describe why you can't calculate the mean number of times using data in the table.

#### Confidence interval for population mean

Compute the sample variance and the sample standard deviation for these data (to 2 decimals).

#### Null and alternative hypotheses of drugstore

Drugstore was the first e-commerce company to offer Internet drugstore retailing. Drugstore.com customers were provided the opportunity to buy health, beauty, personal care, wellness, and pharmaceutical replenishment products over the Internet.

#### Conduct the appropriate test and describe the results

Pepsi wanted to test to determine if the males preferred Pepsi more than the females.  (a) PConduct the appropriate test and describe the results (ick your own alpha value)

#### What is the distribution of mean composite act score

A random sample of 100 entering freshmen is selected. What is the distribution of the mean composite ACT score, for the University?

#### What the sample size to indicate report

Standard deviation of the sampling distribution of sample proportion is 0.025. However, the report did not indicate what the sample size n was. What was it?