Suppose that the speeds of cars travelling on California freeways are normally distributed with a mean of 62 miles/hour. The highway patrol's policy is to issue tickets for cars with speeds exceeding 75 miles/hour. The records show that exactly 2% of the speeds exceed this limit. Find the standard deviation of the speeds of cars travelling on California freeways. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.

College students recorded the self-reported weights (in pounds) of some community college male baseball players and male soccer players. Write a brief comparison of the distributions of weights for the two groups. Include appropriate graphics. Click the icon to view the weights of male baseball and soccer players. Make dotplots using the same axis with one set of data above the other. Choose the correct graph below. Click here to view dotplots C Click here to view dotplots D. Click here to view dofplots B. O Click here to view dotplats A Compare the shape, center, and variation (and mention outliers if there were any). Baseball players' weights are to weigh with The soccer players' weights are with The baseball players tend soccer players. The baseball players have a distribution with variability than the soccer players' distribution. Data table Baseball Players' Weights: 190,192,183,183,190,187,187,187,192,192,184,184,184,192,187,228,183,190,180,184,183,187,184,184,205,187,230 Soccer…

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 36 waves showed an average wave height of x = 16.9 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. What is the value of the sample test statistic? Round two decimal places.

Richard’s doctor had told him he needed to keep track of his blood sugar readings. Listed below are his 20 latest readings. He wanted to create a visual aid for himself in order to see how his blood sugar was doing. 75 125 110 82 178 209 150 130 120 142 90 98 107 163 135 129 147 152 110 100 A. Create a frequency distribution table for the given data set. B. Create a histogram for the data set. C. Describe the distribution of the data.

On the right are raw test scores from a history test. a. Construct an ordered stem and leaf plot for the given data. b. Construct a grouped frequency table for these scores with intervals of​ 5, starting the first class at 55. c. Draw a histogram of the data. d. If a circle graph of the grouped data in​ (b) were​ drawn, how many degrees would be in the section representing the 55–59 ​interval? 55 61 72 80 94 61 71 79 72 74 77 79 88 83 89 86 88 81 86 82 80 97 92 94 94

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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.)

Add the means and divide them by two for each pre-1945 and post-1945 and make an excel bar graph based off this data with error bars on graph

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…

A recent study evaluated how addicted teenagers become to nicotine once they start smoking. The response variable was the number of yes answers on a questionnaire called the Hooked on Nicotine Checklist (HONC). Of teenagers who had tried tobacco, the mean HONC score was 3.8 (s = 4.4) for the 141 females and 2.4 (s = 3.5) for the 178 males. Complete parts a through c below. a. Find the standard error comparing the sample means. Interpret. The standard error is se= 0.4540. (Round to four decimal places as needed.) What does the standard error indicate? ... OA. The standard error is the standard deviation of the sample for this study. OCT 28 OB. The standard error is the difference in standard deviations for the two populations. OC. The standard error is the standard deviation of the difference between x₁-x₂. D. The standard error describes the spread of the sampling distribution of x₁-x₂. b. Find the test statistic and P-value for Ho: H₁ H₂ and Ha: H₁ H₂. Interpret, and explain what (if…