Math 159 Classwork 2.1 to 2.4 (Refer to Ch 2 classwork data in google sheets). Name: 1) The dot plot below shows the pulse rate of a sample of students in gym class before they exercise. a) How many students have a pulse rate of 83? b) Are more students in the pulse rate below 81 or above 81? 79 80 81 82 83 84 85 c) How many students are in the gym class? 2) The stem plot below shows the "number of fish" a sample of adults caught in a fishing trip. a) What does the row 210 38 represent? select one. 0 199 i) one adult caught 2038 fish ii) 2 adults caught 38 fishes iii) 3 adults caught 20, 23 and 28 1 035 fish respectively. 2 038 b) What is the lowest and highest number of fish caught? 3 2 4 lowest: highest: 3) Histogram of exam grades are given below: a) How many students are in the sample? b) How many student scores at or above 70? c) How many students scores from 50 to less than 70? d) What percent of students score between 60 to 70? 4) Histogram of IQ of a sample of adults are given below. Histogram of IQ a) How many adults are in the sample? b) How many adults have IQ from 110 to 120? Frequ c) How many adults have IQ at 100 or more? 80 00 90.00 100.00 120.00 d) How many adults have IQ from 90 to less than 110? e) Can we determine the exact number of adults with IQ equal to 105? Explain. 5) Histogram of a sample hourly rate of workers are graphed below: a) How many workers are in the sample? b) How many workers have hourly rate at 37 or more? Frequency c) How many workers have hourly rate from $19 to $37? 10 19 28 hourly rate in $ 40 a e) What percentage of workers have hourly rate from $10 to $19?6) The prices (in $) of 20 textbooks are given below. Use Statdisk or Google sheets to graph a histogram of the cost (in dollars) of 20 textbooks given below. Use a class width $25 and lowest class value $20. Video for using Statdisk 134, 156, 91, 89, 26, 99, 89, 150, 179, 168, 34, 56, 77, 68, 23, 90, 88, 67, 34, 72 Sketch a copy of the histogram. Be sure to label the vertical and horizontal axis. The shape of distribution is approximately (Normal/left skewed/Right skewed/Uniform). Does the histogram indicate any extreme? (Yes / No) 7) Name the shape of the distribuiton of the following histograms: (left skewed,, right skewd, symmetric or normal) A B C D E of cars shape= shape = shape = shape = shape= Which histograms indicate possible outliers. _A, B, C, D , E_ 8a) A student scores at 88" percentile of a standardized test. Select the true statement. i) The student is placed at top 12% of all students taking the test. i) The student is placed at bottom 12% of all students taking the test. 8b) In a survey about salaries earned by college graduates, Li found that her salary was in the 78" percentile. Should Li be pleased or upset about this result? Explain. 9) Exercise capacity can be measured by the distance, in meters, a patient can walk in 6 minutes on a treadmill Follow are the 6-minute distances measured from 20 patients with cardiovascular disease. 452, 430, 443, 412, 408, 431, 448, 420, 433, 412, 420, 412, 439, 424, 438, 428, 458, 468, 457, 420 Use "one variable statistic calculator" or statdisk to find the following: a) 5-number summary. b) IQR. c) if a patient walks a distance 445.5 m, what can be concluded? i) The patient walks more than 75% of other patients. ii) The patient walks less than 75% of other patients. d) What percent of patients walks more than 430.5 m? i) 25% ii) 75% iii) 50%10) Refer to the heights (in) of a sample of students: 67, 63, 68, 69, 76, 62, 65, 64, 68, 65, 58, 60, 64, 61, 65, 67, 72, 69, 62, 64 a) Use Statdisk/boxplot to find 5-number-summary and IQR. min: Q1: Median: Q3: Max: IQR: b) Determine criteria for an outlier using IQR, Q1 and Q3. below (lower fence): or above(upper fence): c) Are there any outliers? List the outlier(s) if any: d) Use Statdisk to graph a horizontal modified boxplot. Video for graphing modified boxplot. Use the modified boxplot to determine if outlier(s) exist. Is this the same as the result in b)? 11) Listed below are strontium-90 ( in mBq) in a sample of baby teeth obtained from Pennsylvania residents born after 1979. 128, 130, 133, 137, 138, 142, 142, 144, 147, 149, 151, 151, 151, 155, 156, 161, 163, 163, 166, 286 Graph a modified boxplot and determine if there are outliers. Graph modified boxplot video link. Sketch a graph of the horizontal modified boxplot below. What is(are) the value(s) of the outlier? outlier(s) is(are)