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- Please all answera. Which data set has a larger variation? (justify your answer)b. Is Chebyshev' rule verified for these two data sets. (Justify your answer graphically).c. What can we conclude?a. Does the intercept have a useful interpretation in this study? Why or why not. b. Interpret the effect of a unit increase in Length on the response of Weight
- Find Solution: 1. Data: 2. Assumption: 3. Hypothesis: 4. Test statistic: 5. Decision Rule: 6. Decision:Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the plant- ing of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours).2.1 2.2 1.7 1.6 2.3 3.1 1.5 2.6 2.4 2.2 With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. b. Compute the sample mean. c. Compute the sample standard deviation. d. What is the p-value? e. What is your conclusion?Mr. Friend noticed that meetings tended to start late when there were a lot of people in attendance and decided to study that relationship. He collecting data on the number of people who were attending each meeting and the number of minutes late that the meeting started. He noticed there was one point that seemed unusual, so he removed it from the data set. What is true about the point that was removed? a. the point is not unusualb. It is an influential observationc. It has the largest residuald. The slope changes little when the point is removedSelected:e. The correlation is lower with the removal of the point
- INSTRUCTION: Perform appropriate statistical test using the dataset (Sheet name: Depression) if a researcher would like to determine if there is a significant association/relationship between Cortisol (Y) and ACTH (X) in patients with depression. Dataset for this can be retrieved on the given Excel. 1. What is the computed r-value for the given data on "Depression" between Cortisol (Y) and ACTH (X)? 2. What is the computed Mean of "Cortisol" on the given data for depression? Round it off to two decimal places. 3. What is the computed Standard Deviation of "ACTH" on the given data for depression? Round it off to two decimal places.nces Mailings Aa A A Y Review View Help E ENT = = = - V Paragraph F MUMA AMAT Normal No Spacing Styles Headi 1. The US Department of Justice presents the rape and sexual assault rate as the number of such crimes per 1,000 females aged 12 years and older. If in a representative sample 4,000 females 583 reported completed rape in their lifetime, what would be the rape rate per 1,000 females in the United States??1a.calculate the i. mean ii. Mode
- 8.6 Cherry Trees: Timber yield is approximately equal to the volume of a tree, however, this value is dilfficult to measure without fiOrst cutting the tree down. Instead, other variables, such as height and diameter, may be used to predict a tree's volume and yield. Researchers wanting to understand the relationship between these variables for black cherry trees collected data from 31 such trees in the Allegheny National Forest, Pennsylvania. Height is measured in feet, diameter in inches (at 54 inches above ground), and volume in cubic feet. (Hand, 1994) Estimate Std. Error t value P(>|t|) (Intercept) -57.99 8.64 -6.71 0.00 height 0.34 0.13 2.61 0.01 diameter 4.71 0.26 17.82 0.00 (a) Write the regression model (please do not round coefficients): Ey = + 7. height + diameter (b) Keeping diameter constant, how much additional volume should we expect from an average tree if height is increased by 1 foot? cubic feet (c) Are each of the predictors, "height" and "diameter" significant…Study A Use the following description of a research study to answer the next five questions. Researchers were were interested in promoting physical activity within the workplace. They recruited participants to join a team challenge encouraging ways to increase physical activity such as taking active breaks and taking the stairs. Participants either joined as a team or were assigned a team. These teams were then randomly assigned either to be the control group where they just received information about becoming more active or the team-building group, which received the same information as the control group but were encouraged to create a team name and bond as a team throughout the study. One outcome measure of the study was the number of flights of stairs that participants reported taking yesterday. Group Statistics Intervention Mean Std. Deviation Std. Error Mean Flights of stairs yesterday Cbntrol 18 2.3889 3.29240 77603 Team-building 16 6.0000 5.50151 1.37538 Lena Tes Equalty at…please use one or two variable analysis
