Consider the following frequency table representing the distribution of hours students spend on the internet in a week. Hours Students Spend on the Internet in a Week Class Frequency 13-23 8 24-34 2 35-45 46-56 57-67 9 7 11 Step 1 of 2: Determine the lower class boundary for the second class. Cop
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- A researcher collects a sample of n = 20 Introductory to Psychology textbooks and records the number of pages in each book. The results are then placed in a grouped frequency table using intervales of 1-99 pages, 100- 199 pages, 200-299 pages, and so on. If the results were converted into frequency distrubution grapg, what kind(s) would be appropriate?The amount of money spent on a week’s holiday by 40 students, correct to the nearest £10, is shown below 180 190 170 210 190 160 210 180 240 130 190 150 200 210 160 200 180 130 210 180 200 190 220 170 230 270 180 220 200 210 140 210 150 200 210 190 200 170 210 180 (a) Group the data into classes of width £20 starting with 120-139, 140-159 and so on. (b) What is the modal class? (c) Using the grouped frequency distribution you found in part (a), estimate the mean and standard deviation of the data.The following are the number of highway accidentsreported on 30 successive days in a certain county:6 4 0 3 5 6 2 0 0 12 3 7 2 1 1040001802 473620 Construct a frequency distribution of these data. Iden-tify the class boundaries, the class marks, and the class interval.
- The following is the data set for specific research regarding a certain product 15 19 14 20 13 23 16 25 17 12 20 11 23 10 14 11 25 12 11 15 8 17 8 18 16 19 17 19 24 What is the range of the data set? How many class intervals should be constructed? How many elements does the class width has? What is the frequency of the class interval with the highest value? What is the >cf of the 3rd to the highest class interval?Consider a frequency table that has 5 classes. The boundaries for class 1 are 0.9005 and 19.2545. What is the largest possible value in class 1?Refer to the accompanying data set and use the 30 screw lengths to construct a frequency distribution. Begin with a lower class limit of 2.2202.220 in., and use a class width of 0.010 in. The screws were labeled as having a length of 2 1 divided by 4 in.2 1/4 in. 2.226 2.257 2.262 2.266 2.236 2.243 2.242 2.228 2.258 2.253 2.257 2.248 2.243 2.236 2.259 2.259 2.268 2.257 2.247 2.267 2.246 2.266 2.255 2.251 2.268 2.233 2.254 2.264 2.257 2.241
- create a frequency distribution table Data Set R 31.0 34.7 34.9 38.3 31.6 31.1 34.9 32.0 33.3 31.3 28.2 29.3 34.0 Mu-31.2 26.4 39.5 33.8 39.0 29.2 29.3 32.3 32.5 38.4 31.6 29.1 25.8 28.3 sd=4.5 37.6 33.9 17.9 33.7 41.1 38.6 n=46 28.0 28.9 38.3 23.6The number of unclaimed expired prizes (in millions of dollars) for lottery tickets bought in a sample of states is shown. 0.5 1 1.5 1.8 2.1 3 5.3 11.4 12 13 13 15.1 20 30.1 32 32.1 34 54.1 What is the class width for a frequency distribution with 5 classes?A random sample of adult males was obtained and asked whether they belonged to a fraternal organization. The results are given in the following one-way frequency table;
- At a meeting of information systems for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer. Table X_____________________ Frequency 1 _____________________7 2 _____________________5 3 _____________________11 4 _____________________8 5 _____________________9 Referring to the Table above, across all of the regional offices, how many total employees were supervised by those surveyed?Many Walmart stores have automotive departments where customers can buy tires, have their vehicles serviced, and obtain other automotive services. Recently, the manager at an Ohio Walmart collected data on the time customers had to wait to get the desired automotive service. Of the 500 cars in the sample, the shortest time any customer spent waiting was 3 minutes and the longest time was 183 minutes. Assuming that the manager wishes to develop a frequency distribution with 9 classes, which of the following would be an appropriate class width for each class? A) 19.99 B) 3 to 23 C) 20.00 D) 10.50The following table displays a relative frequency distribution for the number of siblings for students in a school. For a randomly selected student in the school, let X denote the number of siblings of the student. Number of Siblings Relative Frequency 0 0.1140 1 0.1420 2 0.7010 3 0.0210 4 0.0120 5 0.0065 6 0.0025 7 0.0010 P (X < 3) = ____________ P (X = 4) = ____________