The following data represent the scores (in words per minute) of 25 computer encoders on a speed test. Complete the table and answer the questions below. Scores f Xm fXm
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- Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 38 waves showed an average wave height of x = 16.7 feet. Previous studies of severe storms indicate that ? = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. a) What is the value of the sample test statistic? (Round your answer to two decimal places.)Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 40 waves showed an average wave height of x = 17.5 feet. Previous studies of severe storms indicate that ? = 4.0 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. Solve the problem using the critical region method of testing (i.e., traditional method). (Round your answers to two decimal places.) test statistic = critical value = State your conclusion in the context of the application. Reject the null…Based on the information on the image answer the following Question: 1- Organize the student's weights in a frequency table of 6 classes with suitable class width (class interval). (You have to construct a table with classes, frequency, cumulative frequency, relative frequency, and percent relative frequency).
- You want to see if it makes a difference which lane to be inwhen there is traffic. You randomly observe 296 cars as theypass by on the four lane freeway. The results are displayed inthe table below. Use a level of significance of a = 0.10.a. Complete the rest of the table by filling in theexpected frequencies:Frequency of Cars in Each LaneOutcome Frequency Expected FrequencyLane 173Lane 2Lane 3Lane 4597985Refer to the (incomplete) grouped frequency table data below which depicts the calorie content (in kCal) in 10grams of 45 different brands of biscuits.Calorie content(kCal)Number of brands(?)Midpoint(?)?? ??2 Cumulativefrequency0 < 8 3 4 12 48 38 < 16 8 12 96 1152 1116 < 24 A 20 360 7200 2924 < 32 11 28 B 8624 4032 < 40 5 36 180 6480 45Σ 45 - -11. The values of A and B, respectively, are:A. 18 and 340B. 16 and 308C. 18 and 380D. 18 and 308 Page 4 of 712. The values of Σ?? and Σ??2, respectively, are:A. 956 and 23504B. 965 and 23504C. 956 and 24305D. 956 and 2530413. The estimated mean, to the nearest kCal, is approximately:A. 23B. 21C. 19D. 2514. The mode (kCal) is approximately:A. 20.0B. 19.7C. 21.8D. 20.715. The standard deviation (in kCal) is approximately:A. 10.1B. 8.5C. 9.2D. 9.8The frequency table below gives the frequency of exam scores rounded to the nearest 5%. Find the mean and round to one decimal place as needed. Number Percentages of on an Exam 65 70 75 80 85 90 95 100 Students 4 8 7 11 9 7 2 2
- A keen angler kept a record of the weight of each of his last 51 catches of fish. The weights, recorded to the nearest 0-1 kg, are as given in the following table. Weight (kg) 0.0-0.4 0.5-0.9 1.0-1.2 1.3-1.7 1.8-2.1 2.2-3.7 3.8-5-2 Frequency 12 8 2 9 8 8 4 Draw a histogram for the data, and use it to calculate the modal class.Illustration 6.2. Prepare a frequency table for the following re- ported weights (in kg) 40 individuals. 47 50 79 45 46 80 82 72 75 74 57 69 65 52 55 60 64 73 61 60 71 70 68 68 65 55 59 61 60 66 54 70 62 53 65 56 52 72 67 58A data set is summarized in the frequency table below. The data set contains a total of 30 data values. What is the missing frequency? Value Frequency 1 5 2 3 3 4 4 6 5 □ 6 2 7 3 8 4
- Suppose a study of speeding violations and drivers who use cell phones produced the following fictional data: Speeding violation in thelast year No speeding violation in the last year Total Uses cell phone while driving 25 280 305 Does not use cell phone while driving 45 405 450 Total 70 685 755 Calculate P(Driver had no violation in the last year AND was a cell phone user). Round your answer to four decimal places.Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 32 waves showed an average wave height of x = 17.3 feet. Previous studies of severe storms indicate that ? = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01.Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave height of ? = 16.4 feet for waves hitting the shore. Suppose that a Nor'easter is in progress at the severe storm class rating. Peak wave heights are usually measured from land (using binoculars) off fixed cement piers. Suppose that a reading of 38 waves showed an average wave height of x = 17.3 feet. Previous studies of severe storms indicate that ? = 3.5 feet. Does this information suggest that the storm is (perhaps temporarily) increasing above the severe rating? Use ? = 0.01. a) Estimate the P-value. choose one: P-value > 0.2500. 100 < P-value < 0.250 0.050 < P-value < 0.1000. 010 < P-value < 0.050 P-value < 0.010 b) Sketch the sampling distribution and show the area corresponding to the P-value.…