Ten people at a party decide to compare ages. Five people are 30 years old, three...

Ten people at a party decide to compare ages. Five people are 30 years old, three are 32, one is 31, and one is 65.

To illustrate the importance of outliers, suppose the 65-year old walks away from the party. Remaining at the party are the five people who are 30 years old, three people that are 32, and one person that is 31.

Determine the mean age and standard deviation, to the nearest tenth, of the people who remain at the party.

A. The mean age of the remaining people at the party is a0

B. The standard deviation is: a1

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

70% of people who are 30 years old will be alive ten years from now. In...

70% of people who are 30 years old will be alive ten years from now. In the random sample of 15 people, calculate the probability that... a) exactly 10 of them will be alive ten years from now b) at least 9 will be alive ten years from now c) at most 8 will be alive ten years from now d) how many of them would you expect to be alive 10 years from now e) let X be the...

Five years ago, peter was three times as old as alex. if at the present time alex is ten years old, how old will peter be in the next three years?

People arrive at a party according to a Poisson process of rate 30 per hour and...

People arrive at a party according to a Poisson process of rate 30 per hour and remain for an independent exponential time of mean 2 hours. Let X(t) be the number of people at the party at time t (in hours) after it started. Compute E[X(t)] and determine how long it takes to have on average more than 40 people at the party.

After ten years on the job, Drew is trying to decide whether to go back to...

After ten years on the job, Drew is trying to decide whether to go back to school and get a masters degree. He performs a cost-benefit analysis to determine whether the cost of attending school will be covered by the increase in salary he will received after he attains his degree. He does research and compiles data on annual salaries in his industry, health care, along with the years of experience for each employee and whether the employee has a...

Suppose that you decide to randomly sample people ages 18-24 in your county to determine whether...

Suppose that you decide to randomly sample people ages 18-24 in your county to determine whether or not they are registered to vote. In your sample of 50 people, 35 said they were registered to vote. a) (2 points) Find a 95% confidence interval for the true proportion of the county population ages 18-24 who are registered to vote. Make sure to check any necessary conditions and to state a conclusion in the context of the problem. Also, explain what...

The following data represents the ages at which people received their first colonoscopy. 30 35 43...

The following data represents the ages at which people received their first colonoscopy. 30 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 Provide a well-written statistical write-up about this sample of patients, and should be no longer than 2 paragraphs. Your write-up should include at minimum: 1 measure of...

Randomly selected 30 student cars have ages with a mean of 7 years and a standard...

Randomly selected 30 student cars have ages with a mean of 7 years and a standard deviation of 3.6 years, while randomly selected 23 faculty cars have ages with a mean of 5.9 years and a standard deviation of 3.5 years. 1. Use a 0.01 significance level to test the claim that student cars are older than faculty cars. (a) The test statistic is (b) The critical value is (c) Is there sufficient evidence to support the claim that student...

A sample of 30 randomly selected student cars have ages with a mean of 7.3 years...

A sample of 30 randomly selected student cars have ages with a mean of 7.3 years and a standard deviation of 3.6 years, while a sample of 19 randomly selected faculty cars have ages with a mean of 5 years and a standard deviation of 3.7 years. 1. Use a 0.01 significance level to test the claim that student cars are older than faculty cars. (a) The test statistic is ??? (b) The critical value is ??? (c) Is there...

Ten years ago, you deposited $2,500 into an account. Five years ago, you added an additional...

Ten years ago, you deposited $2,500 into an account. Five years ago, you added an additional $2,500 to his account. You earned 8 percent for the first 5 years and 12 percent for the last 5 years, both compounded annually. How much money do you have in your account today?

Five years ago REG Inc. sold $200,000,000 worth of bonds with ten years until maturity. The...

Five years ago REG Inc. sold $200,000,000 worth of bonds with ten years until maturity. The bonds were sold at par, and carry an annual coupon of 8%. INA Corp. has just sold $180,000,000 worth of bonds to investors, also at par. INA bonds have five years until maturity and carry a coupon rate of 9% with coupons paid semi-annually. Neither the REG nor the INA bonds have any complex features (they are not callable, they are not convertible etc.),...

Subjects