What percentage of all possible observations of the variable lie between 1/4 and 5/8
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What percentage of all possible observations of the variable lie between 1/4 and 5/8
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- a study was done involving data from all major US cities that compares the number of parks in each city to the average number of times an individual exercises each week. Pearson's r=.76 What does the value of r suggest?For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 596 potsherds was found, of which 362 were identified as Santa Fe black-on-white. (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limitBelow are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in calculations.) Birthrate, x (number of births per 1000 pop.) 0 Female life expectancy, y (in years) 35.1 67.9 52.3 60.2 26.6 74.0 15.1 73.1 31.6 61.5 46.2 58.8 49.9 53.4 27.4 71.9 13.6 76.7 48.4 63.4 41.2 64.6 17.6 71.6 Send data to calculator ✓ xy 2383.29 3148.46 1968.4 1103.81 1943.4 2716.56 2664.66 1970.06 1043.12 3068.56 2661.52 1260.16 X Female life expectancy (in years) Ś 85- 80+ 75- 65- 60- 55+ Figure 1 50- What is the slope of the least-squares regression line for these data? Carry your intermediate…
- A population of N = 15 scores has a mean of u = 8. One score in the population is changed from X = 20 to X = 5. What is the value for the new population %3D %D mean?A study was done in a large undergraduate classroom asking the students to record how many hours they spent doing homework on a typical day rounded to the nearest hour. The data was organized by recording the number of hours (X) and the number of students who responded with that number of hours (frequency). X(# of hours) Frequency of X=x x = 0 7 x = 1 7 x = 2 13 x = 3 4 x = 4 2 Based on these findings, what is the expected number of hours than a student selected at random from this classroom would spend studying each day?For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a combined study of northern pike, cutthroat trout, rainbow trout, and lake trout, it was found that 24 out of 821 fish died when caught and released using barbless hooks on flies or lures. All hooks were removed from the fish. (a) Let p represent the proportion of all pike and trout that die (i.e., p is the mortality rate) when caught and released using barbless hooks. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 99% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limit Give a brief explanation of the meaning of the interval. A. We are 99% confident that the true catch-and-release mortality rate falls outside this interval. B. We are 1% confident that the true catch-and-release mortality rate falls above this interval. C. We are 99% confident that the…
- For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 584 potsherds was found, of which 355 were identified as Santa Fe black-on-white. (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limit Give a brief statement of the meaning of the confidence interval. 95% of all confidence intervals would include the true proportion of potsherds.5% of all confidence intervals would include the true proportion of potsherds. 5% of the confidence intervals created using this method would include the true proportion of potsherds.95% of the…Joshua went to a doctor's appointment yesterday. He was weighed and the paperwork said that his weight put him in the 35th percentile for weight. This means that for all [gender] that were weighed at the same [age], [per]% of them weighed [compare] Joshua. Question 4 options: [gender] boy [gender] girls [gender] all kids [age] day [age] week [age] age [per] 35 [per] 65 [compare] more than [compare] less than [compare] the same asBelow are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Also given is the product of the birthrate and the female life expectancy for each of the twelve countries. (These products, written in the column labelled "xy", may aid in calculations.) Birthrate, x (number of births per 1000 pop.) Female life expectancy, y (in years) xy 25.5 71.8 1830.9 18.6 73.4 1365.24 49.0 61.4 3008.6 31.0 62.4 1934.4 49.8 54.9 2734.02 45.6 59.0 2690.4 35.2 67.0 2358.4 15.5 75.8 1174.9 16.0 72.6 1161.6 40.3 65.0 2619.5 51.0 59.7 3044.7 26.2 74.1 1941.42 What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four…
- For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 596 potsherds was found, of which 369 were identified as Santa Fe black-on-white. (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit =__ upper limit =__For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.Santa Fe black-on-white is a type of pottery commonly found at archaeological excavations at a certain monument. At one excavation site a sample of 594 potsherds was found, of which 368 were identified as Santa Fe black-on-white. (a) Let p represent the proportion of Santa Fe black-on-white potsherds at the excavation site. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 95% confidence interval for p. (Round your answers to three decimal places.) lower limit upper limitSuppose that there is a correlation of r= 0.41 between the amount of time that each student reports studying for an exam and the student's grade on the exam. This correlation would mean that there is a tendency for people who study more to get better grades.
