hey i need help with this
1. [11/14 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Ten individuals went on a low-fat diet for 12 weeks to lower their cholesterol. The data are recorded in the table below. Do you think that their cholesterol levels were significantly lowered? Conduct a hypothesis test at the 5% level. Starting cholesterol level Ending cholesterol level 140 140 200 230 110 120 240 220 200 190 180 150 190 200 360 300 280 300 260 240 NOTE: If you are using a Student's t-distribution for the problem, including for paired data, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) Part (a) a Part (b) Part (c) - Part (d) Enter the degrees of freedom for this test. 20 X Part (e) What is the test statistic? (If using the z distribution round your answer to two decimal places, and if using the t distribution round your answer to three decimal places.) t = - Part (f) What is the p-value? (Round your answer to four decimal places.)2. [-14 Points] DEI'A S UHSTATS 11 .E.055. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER For a sample of 41 men, the mean head circumference is 57 cm with a standard deviation equal to 2.1 cm. For a sample of41 women, the mean head circumference is 55.2 cm with a standard deviation equal to 2.3 cm. a Find the value of the difference between the sample means for men and women. (Round your answer to the nearest tenth.) cm b Find the standard error of the difference between the sample means in this context. (Round your answer to the nearest tenth.) cm (c) Find an approximate 95% condence interval for the difference between population mean head circumferences for men versus women. (Round your answer to the nearest tenth.) An approximate 95% condence interval is C] to :] cm You may need to use the appropriate table in the Appendix of Tables to answer this question. Need Help? _ 3- [3I5 Points] DETAILS PREVIOUS ANSWERS UHSTATS 11.E.D46. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A random sample of ve college women was asked for their own heights and their mothers' heights. The researchers wanted to know whether college women are taller on average than their mothers. The results (in inches) follow. The parameter of interest is the population average difference in the height of college women and their mothers. The parameter of interest is the population difference in the average height of college women and their mothers. The parameter of interest is the population standard deviation of the heights of the mothers of college women. The parameter of interest is the population average height of college women. The parameter of interest is the population average height of the mothers of college women. The parameter of interest is the population standard deviation in the heights of college women. (b) Find a 95% condence interval for the parameter you defined in part (a), in inches. (Use daughters mothers. Round your answers to two decimal places.) :lto:]'m
