1981-82 1982-83 1983-84 1984-85 1985-86 1986-87 1987-88 1988-89 For which year, the percent increase of gold reserves over the previous year is the highest? (a) 1987.88 (b) 1985-86
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- A survey of 2314 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 428have donated blood in the past two years. (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. p=____? (Round to three decimal places as needed.)Calculate the incidence rate of prostate cancer in this population A population of 200 healthy men was followed up for the development of prostate cancer. 10 men were followed-up for 1 year and were then lost to follow-up. After being followed-up for 5 years, 10 men developed prostate cancer. The remaining men who never developed prostate cancer were followed for 10 years.A campus deli serves 300 customers over a busy lunch period from 11:30 to 1:30pm. A quick count of the number of customers waiting in line and being served by the deli staff shows that an average of 15 customers are in the process of waiting at any point in time. What is the average amount of time that a customer spends in the deli process during this busy lunch period?
- What proportion of male growth plates fuse between 16 and 17 years of age? The proportion of male growth plates that fuse between 16 and 17 years of age iAnnualized percentage return on investment (as compared to the Standard & Poor's 500 Index) for 10 randomly selected stock screeners are reproduced in the table. Complete parts a through c.To seethe effect of a relatively small error in the estimate of the amountof carbon-14 in a sample being dated, consider this hypotheticalsituation: A bone fragment found in central Illinois in the year 2000 contains 17% of its original carbon-14 content. Estimate the year the animal died.
- Blood Test Measure (x) Age in Years (y) -15.49 78.2 -11.04 51.3 -13.62 70.1 -7.79 7.6 -14.84 77.9 -8.3 20.1 -9.83 24.4 -15.12 65.7 -13.31 55 -14.66 72.5 -15.77 63 -15 64.7 -10.45 38.7 -7.68 26.1 -15.93 76.2 -6.06 17.3 -16.82 77.6 -16.74 68.1 -14.83 80.5 -8.82 27.7 -9.72 32.2 -15.54 79.9 -7.5 14.3 -6.55 15.4 -12.21 56.8 -10.57 51.4 -11.12 42.3 -5.92 5 -8.03 18.5 -7.72 23 -5.04 2.9 -5.98 4.8 -8.06 10.1 -9.55 39.9 -6.14 11.1 -15.3 81.4 -9.55 20.3 -13.03 52.1 -6.42 7.7 -11.92 59.8 -6.8 22.3 -13.38 53.4 -12.92 64.8 -15.49 72.2 -12.97 66.1 -12.53 39 -12.22 65 -9.6 29 -11.42 24.6 -16.3 88.6 -10.16 46.2 -15.13 66.9 -10.42 23.8 -8.94 22.3 -6.76 16.7 -5.13 1.7 -13.74 64.1 -15.41 62.7 -9.8 27.3 -8 32.8 -9.43 25.4 -13.14 52.9 -15.58 62.9 -6.85 3.3 -8.11 27.2 -15.89 78.7 -14.95 59 -11.92 58 -7.56 31.7 -14.65 77.1 -16.08 80.9 -10.8 55.5 -15.83 48.8…Find the positive geometric mean between 4 and 64.The estimated population in 5 different years of a small town in thousands, is shown in figure below. Based on these given statistics data, estimate the population in 7th year.
- The times (in seconds) between sixteen consecutive eruptions of a geyser were as follows:878, 871, 906, 933, 930, 852, 890, 861, 882, 888, 897, 899, 879, 888, 848 By entering the data into R, find the following (giving answers to two decimal places):The sales amount of a company in its branches in December is as follows. Accordingly, calculate the arithmetic mean, mode, square, standard deviation and coefficient of variation of the series given below. Interpret the values you have calculated. Sales Quantity 224 235 247 270 274 305 314 339Between 1971 and 1975, as part of the National Health and Nutrition Examination Survey (NHANES), 7,381 persons ages 40–77 years were enrolled in a follow-up study. At the time of enrollment, each study participant was classified as having or not having diabetes. During 1982–1984, enrollees were documented either to have died or were still alive. The results are summarized as follows. 1. Of the men enrolled in the NHANES follow-up study, calculate the ratio of non-diabetic to diabetic men. 2. Calculate the proportion of men in the NHANES follow-up study who were diabetics. 3. Calculate the proportion of deaths among men.