4. The mean seat width for a population is 15 inches and std deviation is 1 inch. Find the seat width to accommodate 95% of the population. Use the z table in the lecture slides.
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- What is the difference between relative frequency and cumulative frequency? Choose the correct answer below. A. Relative frequency of a class is the number of observations in that class, while cumulative frequency of a class is the sum of all the frequencies. B. Relative frequency of a class is the proportion of the data in that class, while cumulative frequency of a class is the number of observations in that class. C. Relative frequency of a class is the percentage of the data that falls in that class, while cumulative frequency of a class is the sum of the frequencies of that class and all previous classes. O D. There is no difference between the two.Hallux abducto valgus (call it HAV) is a deformation of the big toe that often requires surgery. Doctors used X-rays to measure the angle (in degrees) of deformity in 38 consecutive patients under the age of 21 who came to a medical center for surgery to correct HAV. The angle is a measure of the seriousness of the deformity. Here are the data. 26 22 15 31 16 29 27 32 21 38 23 51 24 27 30 24 19 23 29 27 22 37 28 18 31 14 20 20 19 22 30 17 14 28 31 20 24 It is reasonable to regard these patients as a random sample of young patients who require HAV surgery. Carry out the Solve and Conclude steps of a 95% confidence interval for the mean HAV angle in the population of all such patients. (Round your answer for x to two decimal places and your answer for s to three decimal places. Round your confidence interval bounds to two decimal places.) confidence interval bounds: ° to3. The data in the table shows the mileage that students commute to school. B. Find the weighted mean. Miles Midpoint Frequency 10 - 14 12 8 15 - 19 17 C. Draw a histogram for the data. 20 - 24 22 9 25 - 29 27 21 30 - 34 32 7 A. How many students are in the class?
- Ethan and Drew went on a 10-day fishing trip. The number of smallmouth bass caught and released by the two boys each day is shown in the accompanying data table. Complete the below. Data Table Ethan 9 24 8 9 6 8 9 9 8 10 Drew 15 2 3 17 20 2 17 2 19 3 Which fisherman seems more consistent? Choose answer below A. Ethan seems more consistent, since his observations are spread out. B. Drew seems more consistent, since his observations are spread out. C. Drew seems more consistent, since more of his observations are clustered together. D. Ethan seems more consistent, since more of his observations are clustered together. (c) Find the population standard deviation for the number of smallmouth bass caught per day by each fisherman. Do these values present a different story about the two fishermen's catches per day? Which fisherman…Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…Select the correct statement about the mean and median for the histogram below. 150 50 LO 5 15 The mean is likely to be larger than the median. The mean is likely to be smaller than the median. The mean and the median are likely to be approximately equal. 25
- Determine whether the data described below are qualitative or quantitative and explain why. Respondents' races are recorded in a survey of racial diversity. Choose the correct answer below. O A. The data are quantitative because they consist of counts or measurements. The data are qualitative because they consist of counts or measurements. O B. O C. The data are qualitative because they don't measure or count anything. O D. The data are quantitative because they don't measure or count anything.Determine whether the data set described below is a population or a sample. Explain your reasoning. A survey of 100 randomly selected students at Keller Graduate School of Management that found 15% of the students traveled more than 10 miles to get to campusListed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. What important feature of the data is not revealed by any of the measures of variation? 9 12 20 12 The range of the sample data is (Round to one decimal place as needed.) The standard deviation of the sample data is (Round to one decimal place as needed.) The variance of the sample data is (Round to one decimal place as needed.) 5 9 16 3 What impactant fasturn of the data is not enunaled through the different m 5 16 variation 4 11 16 12 D
- 44 35 40 44 44 39 40 47 45 45 44 44 46 Find the mean cost. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The mean cost is (Round to one decimal place as needed.) B. There is no mean cost. Does the mean represent the center of the data? A. The mean represents the center. B. The mean does not represent the center because it is the largest data value. C. The mean does not represent the center because it is not a data value. D. The mean does not represent the center because it is the smallest data value. OE. There is no mean cost. Find the median cost. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. The median cost is (Round to one decimal place as needed.) OB. There is no median cost. 40 0 0 0 ODetermine whether the data set is a population or a sample. Explain your reasoning. The diastolic blood pressure of 10 patients in a hospital containing 200 patients Choose the correct answer below. O A. Population, because it is a collection of blood pressure for all patients in the hospital. O B. Sample, because it is a collection of blood pressure for all patients in the hospital, but there are other hospitals. O C. Sample, because the collection of 10 patients' blood pressures is a subset of all patients in the hospital. O D. Population, because it is a subset of all patients in the hospital. Type here to searchLESSON Measures of Center 16-1 Use the situation below to complete Exercises 1-4. The heights (in inches) of the starting players on a high school basketball team are as follows: 72, 75, 78, 72, 73. 1. How many starting players are there? 2. What is the mean height? 3. What is the median height? 4. Does one measure describe the data better than the other? Explain. In Exercises 5-7, find the mean and median of each data set. 5. Daily high temperatures (°F): 45, 50, 47, 52, 53, 45, 51 Mean: Median: 6. Brian's math test scores: 86, 90, 93, 85, 79, 92 Mean: Median: 7. Players' heart rates (beats per minute): 70, 68, 70, 72, 68, 66, 65, 73 Mean: Median: 8. Hikers spent the following amounts of time (in minutes) to complete a nature hike: 48, 46, 52, 57, 58, 52, 61, 56. a. Find the mean and median times. Mean: Median: b. Does one measure describe the,,,,,, data better than the other? Explain. c. Suppose another hiker takes 92 minutes to complete the hike. Find the mean and median times…