i) The following extract from a mortality table with a one-year select period dz 4+1 40 x +1 65 1000 66 66 955 45 67 ii) Deaths are uniformly distributed over each year of age. iii) é165) 15.0. %3D Calculate éle6l
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- A sample of 3 measurements are taken and recorded: a =8, y = 10 and z = 7 The sample mean is: x = = 8.33 Fill in the table below. aj (a; - x)2 Ex: 5.34 Ex: 5.34 Ex: 5.34 82 = (z-z)*+(y-a)* +(z-z) Ex: 5.34 (z-2)*+(y-z)* +(z-) = Ex: 5.349. Temperature Frequency Relative Frequency 70 - 74 3 3/61= 0.0492 75 - 79 16 16/61= 0.2623 80 - 84 15 15/61= 0.246 85 - 89 16 16/63=0.2623 90 - 94 11 11/61=0.1802 Total 61 1 From the frequency chart, calculate the mean.What is the predicted glia-neuron ratio for species with ln(brainmass) equal to that of humans (Homo sapiens)? Please put the answer in bold.
- 15. The dean of a university estimates that the mean number of classroom hours per week for full-time faculty is 10.0. As a member of the student council, you want to test this claim. A random sample of the number of classroom hours for eightfull-time faculty for one week is shown in the table below. At α=0.05, can you reject the dean's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. 11.2 7.5 12.2 7.2 4.1 9.5 13.7 8.5 Question content area bottom Part 1 (a) Write the claim mathematically and identify H0 and Ha. Which of the following correctly states H0 and Ha? A. H0: μ>10.0 Ha: μ≤10.0 B. H0: μ≠10.0 Ha: μ=10.0 C. H0: μ<10.0 Ha: μ≥10.0 D. H0: μ≤10.0 Ha: μ>10.0 E. H0: μ≥10.0 Ha: μ<10.0Wetflix Section 9.1 Homework In one city, 27.8% of the 9000 st x+ //cypresscollege.instructure.com/courses/29586/assignments/814917?module_item_id=1906534 120PC > Assignments > Section 9.1 Homework Section 9.1 Homework ces es 34 Due Thursday by 1:20pm Points 15 Submitting an external tool intel Re IRIS GRAPHICE Section 9.1 Homework Score: 7.33/15 9/15 answered Question 10 > You recently sent out a survey to determine if the percentage of adults who use social media has changed from 65%, which was the percentage of adults who used social media five years ago. Of the 3055 people who responded to survey, 1669 stated that they currently use social media. a) Use the data from this survey to construct a 97% confidence interval estimate of the proportion of adults who use social media. Record the result below in the form of (#,#). Round your final answer to four decimal places. b) Can you conclude that the percentage of adults who use social media has changed? Explain. O Yes, because the…Ims.tu.edu.sa قائمة القراءة. Remaining Time: 34 minutes, 24 seconds. v Question Completion Status: QUESTION 1 "Suppose X has an exponential distribution with ß=1/2 , then P (X2 2) is " 0.3988 O 0.0183 0.4786 O 0.2916 QUESTION 2 "Suppose X has an exponential distribution with ß=1/4 , then P (Xs1.) is " O 0.9817 O 0.3246 O 0.4105 O 0.5116 QUESTION 3
- Examus cdn.student.uae.examus.net/?rldbqn=1&sessi... Given the following sample data: 43, 50, 44, 49, 50 The value 362dcf917 Formulae Sheet STAT-101-1 X-X Conversion formula, z = Minimum "usual" value = E– 2s P(x) = n! %3D (n-x)lx! p* qn-x %3D Maximum "usual" value = i† 2s Ge362dcf917 Midrange = ī = Ex Σ-22 min value max value || S = %3D Variance =npq n-1 2. a. Mean Total Frequency E-ΣΧΡx) ; b. Range E= np %3D ce36Ydcf917 çe362dcf917 ce362 C. Midrange d. Median ce362dcf917 0% ce362dof917 MacBook Pro e362ucf917 PI L5. Bone mineral density (BMD) is a measure of bone strength. It is defined as the ratio of bone mass to the cross- sectional area of the bone that is scanned, and it is expressed in units of grams per square centimeter (g/cm²). Recent studies suggest that peak BMD in women is achieved between ages 15 and 40, and BMD declines after age 45. Decreased BMD is associated with increased risk of bone fracture. In a recent study, the impact of regular physical exercise on women in differing stages of BMD development was examined. A simple random sample of 59 women between the ages of 41 and 45 and with no major health problems were enrolled in the study. The women were classified into one of the two following groups, based on their level of exercise activity. • Sedentary: minimal participation in physical exercise in the past three years (This group contained 31 women.) • Walkers: walk at an aerobic pace at least 135 minutes per week during the past three years (This group contained 28 women.)…84 None 3t у" - зу'— 4у %3 е"variationof parameters |
- 1. The data in Table 7–6 were collected in a clinical trial to evaluate a new compound designed to improve wound healing in trauma patients. The new compound was com- pared against a placebo. After treatment for 5 days with the new compound or placebo, the extent of wound healing was measured. Is there a difference in the extent of wound healing between the treatments? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance. Use the data in Problem 1. Pool the data across the treatments into one sample of size n = 250. Use the pooled data to test whether the distribution of the percent wound healing is approximately normal. Specifically, use the following distribution 30%, 40%, 20%, and 10% and a = 0.05 to run the appropriate test. Percent Wound Healing Treatment 0-25% 26-50% 51-75% 76-100% New compound (n=125) 15 37 32 41 Placebo (n=125) 36 45 34 10Need only a handwritten solution only (not a typed one).