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As the population ages, there is increasing concern about accident-related injuries to the elderly. The ar- ticle Age and Gender Differences in Single-Step Recovery from a Forward Fall (J. Gerontol., 1999: M44-M50) reported on an experiment in which the maximum lean angle the furthest a subject is able to lean and still recover in one step was determined for both a sample of younger females (21-29 years) and a sample of older females (67-81 years). The following observations are consistent with summary data given in the article:
YF: 29, 34, 33, 27, 28, 32, 31, 34, 32, 27
OF: 18, 15, 23, 13, 12
Does the data suggest that true average maximum lean angle for older females is more than 10 degrees smaller than it is for younger females? State and test the relevant hypotheses at significance level .10 by obtaining a P-value.
Thirty-five fourth-grade students were asked the traditional question "what do you want to be when you grow up? The responses are summarized in the following table:
The heart rate in beats per minutes of 30 randomly selected students are given below: 78 64 69 75 80 63 70 72 72 68 77 71 74 84 70 62 67 71 69 58 74 70 80 80 63 88 60 68 69 70 71. Is it normal distribution or find the normal distribution.
A 2005 study found that 202 women held board seats out of a total of 1,195 seats in the Fortune 100 companies. A 2003 study found that 779 women held board seats out of a total of 5,727 seats in the Fortune 500 companies.
conduct an historical study of a random variable of your choice collect a sample of observations and provide detailed
a die is loaded and a 6 comes up with probability 1?4. if the die is tossed twelve times find the probability thata the
A standard deviation of 8. If 100 people are randomly selected, find the probability that their mean blood pressure will be greater than 122.
Test claim that mean responses are same for all populations of patients receiving either treatment and of either gender.
Bring to mind a research question that interests you, or a current event that utilizes statistics to present results, that you can use as an example for this discussion. State the research question or the current event and results.
The number of lightning strikes in a year at the top of a particular mountain has a Poisson distribution with a mean of 4.2. Find the probability that in a randomly selected year, the number of lightning strikes is 0.
you have been asked by corporate to analyze some company-wide data from an annual customer satisfaction survey where
Four customers in succession come into the store to order stereos. The retailer is interested in their preferences. List the possibilities for preference arrangements among the four customers.
A candidate must gather at least 8,000 valid signatures on a petition before the deadline in order to run in an election. One candidate turns in 10,000 signatures right before the deadline
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