Almost all employees working for financial companies in New York City receive large bonuses at the end of the year. A sample of 63 employees selected from financial companies in New York City showed that they received an average bonus of $63,000 last year with a standard deviation of $24,000. Construct a 95% confidence interval for the average bonus that all employees working for financial companies in New York City received last year. Round your answers to cents.

In a survey, 28 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $30 and standard deviation of $3. Find the margin of error at a 98% confidence level. Give your answer to two decimal places. ch daurfT d.bLoA

You get a random sample of 30 students, and you give them an Anxiety inventory called Form A. Below are the scores for 30 students. What is the Standard Deviation for the 30 Form A scores? 2 3 5 B UD 7 8 9 10 Form A 6 6 9 8 5 6 8 4 6

A random sample of 40 12th-grade students was asked how long it took to get to school. The sample mean was 15.5 minutes and the sample standard deviation was 12.7 minutes. a. Find a 95% confidence interval for the population mean time it takes 12th-grade students to get to school. b. Would a 90% confidence interval based on this sample data be wider or narrower than the 95% confidence interval? Explain. Check your answer by constructing a 90% confidence interval and comparing the width of the interval with the width of the 95% confidence interval you found in part (a). a. The 95% confidence interval is from minutes to minutes. (Round to two decimal places as needed. Use ascending order.) b. Would a 90% confidence interval based on this sample be wider or narrower than the 95% confidence interval? O A. The 90% interval is wider because it has a lower confidence level, and therefore uses a smaller critical value, which creates a wider interval. O B. The 90% interval is wider because it…

In a survey, 22 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and standard deviation of $14. Construct a confidence interval at a 95% confidence level. Give your answers to one decimal place. H Interpret your confidence interval in the context of this problem.

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Please explain. In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $41 and standard deviation of $4. Find the margin of error at a 90% confidence level.Give your answer to two decimal places.

Salaries of 25 college graduates who took a statistics course in college have a​ mean of $79,350 and a standard​ deviation of $1,280​. Construct a 98​% confidence interval for estimating the population standard deviation. Enter the upper bound of the confidence interval. (Round your answer to nearest whole dollar.)

In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $48 and standard deviation of $3. Find the margin of error at a 90% confidence level. Give your answer to two decimal places. Calculator Submit Question

70 students are asked in a survey how many hours they work during a week. Their responses have a mean of 17 hours and a standard deviation of 2 hours. Find the margin of error for a 80% confidence interval. Round your answer to two decimal places. hours