Use the Student's t distribution to find tc for a 95% confidence level when the sample size is 6. (Select below) 2.447 2.571     2.015 1.960

Keisha wants to estimate the percentage of managers at her company that hold an MBA. She surveys 320 managers and finds that 70 hold an MBA. Find the margin of error for the confidence interval for the population proportion with a 90% confidence level. z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576   Use the table of common z-scores above. Round the final answer to three decimal places.

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HW10Q6

In a random sample of five people, the mean driving distance to work was 25.1 miles and the standard deviation was 6.6 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean p. Interpret the results. * *I Identify the margin of error. miles (Round to one decimal place as needed.) rary More Clear all Check answer Get more help - Media View an example ess Help me solve this ESources 58°F A @ S 6. ress e here to search 10/05/17

A survey of 1000 people was conducted. 44% said they found it hard to adopt a child in the US. margin of sampling is + or - 3%. with a 95% confidence level. Use the margin of error for a confidence interval estimate. Whart population parameter are we estimating for this sample statistic

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Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 85 weekly reports showed a sample mean of 18.5 customer contacts per week. The sample standard deviation was 5.4. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel. 90% confidence interval, to 2 decimals: 95% confidence interval, to 2 decimals: