For a question on a statistics exam, students were asked to describe the general shape of the histogram below. b. C. d. Frequency e. Blood Glucose Levels After 12 Hours of Fasting For a Sample of Patients 60 40 20 65.5-73.5 57.5-65.5 73.5-91.5 Blood Glucose Levels (mg/dL) For parts a-d below, a "yes" or "no" answer is sufficient. a. 91.5-99.5 99.5-107.5 107.5-115.5 115.5-123.5 Student A says that the shape of the histogram is skewed to the right. Is that correct? Student B says that the shape of the histogram is roughly uniform. Is that correct? Student C says that the shape of the histogram is roughly symmetric. Is that correct? Student D says that the shape of the histogram is skewed to the left. Is that correct? Explain your "yes" answer for the student you think is correct.

Data was collected for a sample of organic snacks. The amount of sugar (in mg) in each snack is summarized in the histogram below. Frequency 10 8 6 4 2 100 101 102 103 104 105 106 10 amount of sugar (mg) What is the frequency of 102 mg of sugar? snacks

Pain medications sometimes come with side effects.  One side effect is dizziness.  A researcher wanted to determine if some pain medications produced more or less dizziness than others.  The results from his study are shown in the table below. Use a test to determine if the proportion of people within each treatment group  who experienced dizziness are the same at the � = .01 level of significance.   Tordol Placebo Naproxen Tylenol Advil Dizziness 83 32 36 5 8 No dizziness 4063 1832 1330 382 337 1) Determine the null and alternative hypotheses. Select the correct pair.   ��:The proportion of people within each treatment group  who experienced dizziness are independent��: The proportion of people within each treatment group  who experienced dizziness are dependent ��: The proportion of people within each treatment group  who experienced dizziness are the same��: The proportion of people within each treatment group  who experienced dizziness are different   2) Determine the…

The scores and their percent of the final grade for a statistics student are given.What is the student 's weighted mean score?                                  Score                 percent of final grade Home work                 86                                   15 Quiz                            90                                   15 Quiz                            96                                    15 Project                        96                                     25 Final Exam                  92                                     30

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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…

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score? The student's weighted mean score is (Simplify your answer. Round to two decimal places as needed.) Homework Quiz Quiz Project Final Exam Score Percent of final grade 86 10 83 10 98 10 98 40 89 30

A study was conducted to examine the impact of speaking in public on college students. A class of 15 statistics students participated in the study. At the beginning of a lecture the students recorded their systolic blood pressure. During the lecture the instructor called on each student to stand and answer questions about topics in the lecture. After speaking the students once again recorded their blood pressure. The resulting values are given below along with summary statistics. before 100 123 128 125 136 108 130 113 105 136 146 138 108 149 132 after 141 142 146 136 144 111 132 114 103 133 140 130 100 133 113 difference -41 -19 -18 -11 -8 -3 -2 -1 2 3 6 8 8 16 19   before after difference mean 125.1 127.9 -2.733 st dev 15.26 15.45 15.23 Does this information indicate that blood pressure increased because of speaking? Conduct an appropriate hypothesis test and show appropriate steps. Let μ1 mean systolic blood pressure before speaking in public, and μ2 mean…

A number of attendees at a sporting event were asked their age. The results are depicted in the histogram below. According to the histogram, what percentage of individu- als surveyed are older than 14 but younger than 20? 30 25 25 20 18 15 12 10-14 15-19 20-24 25-29 20

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 1 7 4 8 4 9. 10 2 The mean score on this test is: The median score on this test is: Check Answer