Exercises Escobar performed a study to validate a translated version of the Western Ontario and McMaster University index (WOMAC) questionnaire used with spanish-speaking patient s with hip or knee osteoarthritis . For the 76 women classified with sever hip pain. The WWOMAC mean function score was 70.7 with standard deviation of 14.6 , we wish to know if we may conclude that the mean function score for a population of similar women subjects with sever hip pain is less than 75. Let a =0.01

Part I -Explain in your own words the purpose of calculating measures of central tendency for a data set. Provide one (1) example. Part II- Explains the concept of bias, related to the mean, mode, and median. Part III-If you were allowed to choose between the mean, the median, or the mode to calculate the measures to make a decision on a data set, which of the three measures would you use and why? Part IV-Using the data below, compute the mean, mode, and median: 67, 98, 87, 95, 93, 88, 90, 62, 71, 99. Part v-Find the first and third quartiles for a week's temperatures from last year's summer, expressed in degrees Fahrenheit: 82, 90, 93, 88, 91, 96, 87. Part VI-Below is a table of frequencies. Find the mean, mode, and median. Frequency Limits (f) 110-115 15 116-121 22 122-127 19 128-133 20 134-139 9 140-145 21 146-151 11 Part VII- Below are the weight (pounds) data for a group of babies born at Auxilio Mutuo Hospital last month: 5.8, 7.5, 8.0, 6.0, 7.3, 8.1, 6.4, 7.3, 7.2, 6.1, 5.8,…

The operations manager of a company that manufactures tires wants to determine whether there are any differences in the quality of workmanship among the three daily shifts. She randomly selects 499 tires and carefully inspects them. Each tire is either classified as perfect, satisfactory, or defective, and the shift that produced it is also recorded. The two categorical variables of interest are: shift and condition of the tire produced. The data can be summarized by the accompanying two-way table.   Perfect Satisfactory Defective Total Shift 1 106 124 2 232 Shift 2 66 85 3 154 Shift 3 36 74 3 113 Total 208 283 8 499 A) This sample has degree of freedom:��= If shift and quality are independent, thenB) With any expected count accurate to 2 decimal places, the expected count in row 1 column 1 is�1,1= C) With any component accurate to 2 decimal places, the component value in row 1 column 1 of the table iscomponent1,1= D) �2 value of this sample is�2=  . Round to 2 decimal…

Identify the independent variable, the dependent variable, and the unit of analysis in the following hypothesis: families that eat dinner together regularly have closer relationships than those who do not.

A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older Fewer than 6 38 36 6 to 6.9 60 57 7 to 7.9 76 74 8 or more 66 93 (a) Conduct a test of independence to determine whether hours of sleep are independent of age. (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night?

How to find independent and defendant variables

List and explain all three classes of decision making?

A graphic representation of a hypothesized causal model is known as a(n): Burchard chart. polygon. areas chart. path diagram. scatter plot.

Hi, please answer both. Thanks!

How can we interpret Decision curve analysis in prognostic research?