The data is in the height column. Answer 7 to 10
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- Insurance companies can lower their risks by A) using the law of large numbers to make the number of claims more predictable. B) diversifying across insurance products. C) granting large numbers of independent risk policies. D) all of the aboveRiver blindness, formally known as onchocerciasis, was a disease labeled by the World Health Organization (WHO) as a public health and socioeconomic problem of considerable magnitude in over 35 developing countries throughout the Third World. Some 85 million people in thousands of tiny settlements throughout Africa and parts of the Middle East and Latin America were thought to be at risk. The cause: a parasitic worm carried by a tiny black fly that bred along fast-moving rivers. When the flies bit humans — a single person could be bitten thousands of times a day — the larvae of a parasitic worm entered the body. These worms once inside caused terrible itching resulting, so bad that some victims committed suicide. Eventually they invaded the eyes, often causing blindness. The World Health Organization estimated in 1978 that some 340,000 people were blind because of onchocerciasis, and that a million more suffered from varying degrees of visual impairment. At that…The retailing manager wants to determine whether product location has any effect on the sale of products or its only Brand Spinney’s which has an impact. Three different locations are considered: Location A, Location B and Location C. A random sample of 18 stores is selected, with 6 stores randomly assigned to each aisle location. The size of the display area and price of the product are constant for all the stores. At the end of the one-month trial period, the sales volumes (in thousands of dollars) of the product in each store were as shown: Summary stats for samples Location A Location B Location C Sample sizes 6 6 6 Sample means 7.467 3.467 5.133 Sample standard deviations 1.648 0.653 1.418 Sample variances 2.715 0.427 2.011 Weights for pooled variance 0.333 0.333 0.333 Number of samples 3 Total sample size 18 Grand…
- Trematodes of the species Euhaplorchis californiensis may infect the California kill fish, Fundulus parvipinnis. Researchers have observed that infected fish spend excessive time near the water surface, where they may be more vulnerable to bird predation. Researchers set up an experiment in a large outdoor tank that stocked with three kinds of killifish, uninfected, lightly infected, and highly infected, and recorded the number of fish that is eaten by birds. State the null and alternative hypothesisSpecimen Method 1 Method 2 1 1.5212457 1.5385967 2 1.5514927 1.5354895 3 1.4748865 1.4737537 4 1.5440624 1.5529241 5 1.5381555 1.5297297 6 1.6505717 1.6081168 7 1.3261934 1.3231544 8 1.5038477 1.5110962 9 1.428179 1.4512758 10 1.467465 1.4845284 11 1.5472126 1.5571789 12 1.2918578 1.3506767 13 1.4618478 1.4986059 14 1.5936601 1.5668332 15 1.4803333 1.5175659 16 1.6290638 1.6226015 17 1.4427661 1.4122777 18 1.6796492 1.6888483 19 1.4045012 1.400003 20 1.3489328 1.3604714 21 1.5058152 1.5016116 22 1.4720991 1.4776931 23 1.4545904 1.509409 24 1.430578 1.4316958 25 1.5169106 1.5382421 26 1.536495 1.5902854 27 1.6175856 1.64074 28 1.3455597 1.4092455 29 1.4430694 1.4113823 30 1.5438335 1.5427199During the 2013 season, Major League Baseball took steps to speed up the play of baseball games in order to maintain fan interest. The average duration of a game from a sample of 60 games played during the summer of 2012 was 2 hours and 52 minutes. The average duration of a game from a sample of 50 games played during the summer of 2013 was 2 hours and 46 minutes. For the purposes of this question, let 2013 games be population 1. 1a. A research hypothesis was that the steps taken during the 2013 season would reduce the population mean duration of baseball games. Formulate null and alternative hypotheses. 1b. What is the point estimate of the reduction in the mean duration of games during the 2003 season?
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