Mathematic 10-19 20-29 30-39 40-49 50-59 60-69 degrees Pupils (fi) 2 5 11 25 31 27 Find the (1)Mean, (2)Median, (3) Mode, (4)S.D, (5) C.V% 70-79 17 80-89 90-99 7 5
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- Variables Age at which first child was born AGEKDBRN Survey question: How old were you when your first child was born? Respondent’s sex SEX Respondent’s sex (1 = male or 2 = female) Descriptive Statistics: Sex n Mean Std. Dev. Min. Q1 Median Q3 Max. IQR male 679 25.5 5.91 12 21 25 29 51 8 female 987 23.4 5.45 13 19 22 27 45 8 Descriptive Statistics: Group Sample Size Mean Std. Dev. female 987 23.44 5.45 male 679 25.55 5.91 Question: Find the 95% confidence interval for the difference between men and women in the mean age at which their first child was born and report the results below. Find the confidence interval for the difference (mean for men – mean for women). Describe in words what the confidence interval shows about the difference in the mean age at which men and women have their first child.Find the measures of center for following.Question Find mean, median and mode of following data: Class Interval Frequency 2-8 9-15 16-22 23-29 30-36 37-43 13 7 3 8. 4
- Question. 18Data on the cost (millions of dollars) and the running time (minutes) for films of a particular season are summarized in the computer output shown to the right and the plots below. Complete parts a and b Click the icon to view the plots. a) Check the assumptions and conditions for inference Select all that apply The residual plot and the scatterplot show consistent variability The scatterplot looks straight enough The residuals look random The residuals are nearly normal None of the assumptions and conditions for inference are satisfied. b) Find a 95% confidence interval for the slope and interpret it. m% confident that the cost of making longer movies (Round to two decimal places as needed. Use ascending order.) Dependent variable is: Budget(SM) squared-24.0% R s 25.12 with 20-2-18 degrees of freedom Variable Coefficient SE(Coeff) t-ratio P-value intercept -23.5882 Run Time 0.665602 0.2788 34.12 -0.69 0.4982 2.39 0.0282 at a rate of between and milion dollars per minute Plots 120 Run…please answer question 9
- Path: p Calculate the variance of each of these fictitious samples: (a) 12, 6, 7, 3 (b) 9, 13, 8, 10 (c) 21, 15, -10, 6 A Paragraph a= CTRONIQ F5 F6Sample Problem An article in the Journal of Soundand Vibration (1991, Vol. 151, pp. 383-394) described a study investigating the relationshipbetween noise exposure and hypertension. The following data are 5 representative of those reported in the article.x represents the sound pressure level in decibels andy represents the blood pressure rise in milli meters of mercury a. Drawa scatter diagram of y (blood pressure rise in milli meters of mercury) versusx (sound pressure level in decibels). b. Fit the simple linear regression model using least squares. c. Find an estimate of the variance o 2 d. Find the predicted mean rise in blood pressure levelassociated with a sound pressure level of 85 decibels e. Calculate the coefficient of determination for this modeland provide an interpretation. 60 63 65 70 | 70 | 70| 80 90 80 | 80 y 1 1 5 1 4 6. 85 89 | 90 90 90 90 | 94 | 100 100 100 y 4 6. 8 4 9. 7 6.< Prev Question 7 of 23 Step 1 of 1 The grades on the second statistics test for Mrs. Sweeney's class are in the following list. Find the frequency distribution for the grades. A, D, D, C, B, D, D, F, B, B, B, B, D, D, D, F, B, B, D, B, B Grade A frequency= Grade C frequency= Grade F frequency= Grade B frequency= 01:26:29 Grade D frequency= Keypad Keyboard Shortcuts Next
- Subject :Scenario: Is there a relationship between number of hours studied (X) and final exam scores (Y)? Question: What is the most appropriate statistical test to conduct given this scenario? Pearson's r correlation Spearman correlation Point Biserial correlation Phi correlationClass Frequency 8-12 13-17 14 18-22 10 23-27 4 28-32 The 75th percentile of the data presented in the table above is O a. 19 O b. 22 O c. 18.5 O d. 20 О е. 21
