Question: Consider the data file labeled Cholesterol Data available under Data Sets in Excel in the main menu. Here is a short description of the data set: 350 adult males between the ages of 30 and 65 participated in a study to investigate the relationship between the consumption of meat and serum cholesterol levels. Each...
Question: Consider the data set labeled NBA 2008-2009 Data available under Data Sets in Excel in the main menu. (a) Select 25 basketball players, and record their heights and weights in two columns. Display your data values. There should be 25 data values in each column. (b) You would like to see whether there is...
Question: A psychological test, used to measure the level of hostility, is known to produce scores which are normally distributed, with a mean of 35. Suppose that the test was administered to 25 randomly selected individuals. The sample produced the mean of 40.2 with a standard deviation of 8.55. Test whether there is evidence that...
Question: (10 marks). A study used two different types of method to measure the oxygen delivery level of 25 patients. The file data1_Q1.sav consists of two columns of data simulated to represent this information. a. What are the means, variances and standard deviations of ‘method1’ and ‘method2’ oxygen delivery level? (2 marks). b. Do box...
Question: A researcher collected data on systolic blood pressure (SBP) from a sample of hypertensive patients. Sample mean of the measurements was 140.1 mmHg and sample standard deviation was 10.3 mmHg. Only ONE of the intervals presented below can be a 95% confidence interval for the unknown mean SBP of the population. Please, circle this...
Question: Master nursing student collected BMI from 100 patients. Histogram of the data indicated that the distribution of BMI can be well approximated by normal distribution. It appears that 16th sample percentile of her data was 22.5 kg/m2 and 95% confidence interval for the population mean BMI was (27.7kg/m2, 28.0kg/m2) a) Approximately, the sample mean...
Question: A sample of 85 male professors at a major four-year university produced a mean annual pay of $75,600 and a standard deviation of $4,550. A sample of 80 female professors at the same university produced a mean of $68,250 and a standard deviation of $6,250. Does this constitute enough evidence to conclude that male...
Question: The mean length of time required for a random sample of 100 students to earn a bachelor's degree at a certain college is 4.5 years. Assuming that the population standard deviation is 2.5 years, construct a 99% confident interval estimate for the mean time to graduation for all students at the college. (15 points)
