2. Given the following Confidence Interval for the population mean

The frequency table above represents the weights (in pounds) of 50 selected students at a major university. Find the 150 – 154 class frequency. Weight (in pounds) Frequency 135-139 7 140-144 12 145-149 11 150-154 155-160 9

Use the given degree of confidence an sample data to find the margin of error in estimating the population mean

The sample size used to construct the ogive shown below: is approximately

Surgery Success A surgical technique is performed on fifteen patients. You are told that there is a 70% chance of success. Find the probability that the surgery is: Successful for at least seven patients Non successful for more than six but less than thirteen patients Successful for less than thirteen patients Non successful for at least six but no more than eleven patients Do not submit your work here. Hold up your work to the webcam when you are done. Once you have submitted the test, you will upload your work on a separate assignment which will unlock after completing this test.

A research center estimates that no more than 40% of US adults eat breakfast every day. In a random sample of 250 US adults, 41.6% say they eat breakfast every day. At

Suppose the you have a left tailed test with a critical value , . The following value of the test statistics TS:  

Statistics professors have claimed that the average number of headaches during a semester of Statistics is 16. They sampled 22 students and found a sample mean of 13 and a sample standard deviation of 8. Do the data provide sufficient evidence to support the statistics professors claim? Test at 5% level of significance (use critical value method). Show your work. Do not submit your work here. Hold up your work to the webcam when you are done. Once you have submitted the test, you will upload your work on a separate assignment which will unlock after completing this test.

Identify the class width and the sample size used in the following frequency distribution: Class Cumulative frequency 50-53 5 54-57 13 58-61 23 62-65 32 66-69 35

I understand that I must show my work for questions 9-11 by holding up my paper to the webcam during the exam so that it is visibleand submitting the work on the “Test 3 (Submit Your Work)” assignment that becomes available when I complete this test.