A marathon is a foot race with a distance of 26.22 miles. The Olympic record for the women's marathon wos set during the 2012 Olympics by Tiki Gelana of Ethiopia, with a time of 2 hours, 23 minutes, 7 seconds. The Olympic record for the men's marathon was set during the 2008 Olympics by Samuel Kamau Wanjiru of Kenyo, with a time of 2 hours, 6 minutes, 32 seconds. Training for a marathon typically lasts at least 6 months. The training is gradual, with increases in distance about every 2 weeks. About 1 to 3 weeks before the race, the distance run is decreased slightly. The stem-and-leaf plots below show the marathon training times (in minutes) for a random sample of 30 male runners and 30 female runners. Training Times (in minutes) of Female Runners 17 |8 9 9 18 0 0 0 0 1 23 46 6 7 9 19 0 0 013 45 56 6 20 | 0 01 2 3 Key: 17|8 - 178 Training Times (in minutes) of Male Runners 15 |5 8 9 9 9 Key: 15|5 - 155 16 0 0 0 0 1 2 3 4 4 5 8 9 17 01135 6 6 7 79 18 015 1. Use the sample to find a point estimate for the mean training time of the o. female runners 6. male runners. 2. Find the sample standard deviation of the training times for the

A high school has 1800 lockers. They decide they are going to take out all of the lockers. They can take out 15 lockers a day. How many lockers can they remove in 10 weeks? Assume they only work 5 days a week. a 1,050 b 1,065 1,035 1,080

The populations of the three largest cities in Canada were the first city with 5,317,957 people, the second city with 3,601,835 people, and the third city with 2,212,824 people. Estimate the total population of the three cities. The total population is approximately people.

show step by step and answer all questions The 102 highway has a posted speed limit of 70 miles per hour on the stretch from San Francisco to Bay Area. For a single week, the highway patrol set up a hidden radar gun to measure how many cars break the speed limit after having numerous reports of accidents on this stretch of highway. The highway patrol needs to put together an action plan if the annual proportion of vehicles who break the speed limit is over 9%. However, they could only set up the radar gun for one week. Question-The sampling method used for this situation would most likely be considered 'convenience sampling.' Find a potential fault, bais, or hidden variable in the way this sample was conducted that might skew the results. -What is the sample size,What is the proportion of vehicles who broke the speed limit over this 1 week period from Bay Area to San Francisco? -Construct a 90% confidence interval for the proportion of vehicles who break the speed limit annually. -Is…

Which companies spend the most money on advertising? A news website maintains a list of the top-spending companies. In 2014, Company A spent more than any other company, a whopping $5.30 billion. In second place was Company B, which spent $3.28 billion. The top 12 companies and the amount each spent on advertising in billions of dollars are as follows. Advertising ($ billions) Advertising ($ billions) Company Company A 5.30 G 2.29 3.28 H 1.75 3.41 I 1.89 2.76 2.27. E 2.54 K 1.96 2.04 1.58 (a) What is the mean amount (in billion dollars) spent on advertising? (Round your answer to two decimal places.) billion (b) What is the median amount (in billion dollars) spent on advertising? billion (c) What are the first and third quartiles (in billion dollars)? first quartile %24 billion third quartile %24 billion

An apple farm yields an average of 45 bushels of apples per tree when 21 trees are planted on an acre of ground. Each time 1 more tree is planted per acre, the yield decreases by 1 bushel (bu) per tree as a result of crowding. How many trees should be planted on an acre in order to get the highest yield? In order to get the highest yield, trees should be planted on an acre. OCEED

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The Centers for Disease Control and Prevention estimates that 0.2% of the US population died of heart disease in 2006.  A new medical treatment plan claims that it will reduce the risk of dying from heart disease by 12%.  There were approximately 311 million people in the US in 2006.  With this new treatment plan, how many people could be saved in a year if it works?     74,640     622.000     746,400     37,320,000     62,200,000

The table below shows the elevation of 6 cities in California. How many meters greater is the elevation of Brentwood than the elevation of Bombay Beach? The following table shows the elevation of 6 cities in California. How many meters greater is the elevation of Brentwood than that of Bombay Beach?

In 10000 meter race, runners complete over 25 laps or a 400 meter track. It is the longest track running event held. The men's 10000 meter began at the 1912 Olympics. It was 1988 (over seventy years later) before the women's 10000 meter was added to Olympic competition. The official world records in the 10,000 meters are held by Kenenisa Bekele with 26:17.53 minutes for men and Almaz Ayana from Ethiopia with 29:17.45 minutes for women. In this project, we are going to take a look at the 2016 Rio Olympics men and women 10000 meter competition. All the times for the participant's times are given to you in minutes. You should leave the times in minutes and round to the nearest thousandth when needed. Assume the populations are normally distributed. 1. Use the samples to find the mean completion time of the for the a. male runners. b. female runners. 2. Use the samples to find the sample standard deviation of the completion times for the a. male runners. b. female runners.