Q.1) The figure below is a histogram of 100 times between successive customer arrivals in a store. Estimate the mean of the data. 10 15 20 25 30 35 Intoramrival Timo Q.4). Two variables x and y are believed to have a straight-line relationship. We would like to predict y from x. Minitab tells us this about x and y: Descriptive Statistics: x, y Mean StDev Minimum Maximum Median Variable NO. 7 7.00 4.32 1.00 13.00 7.00 y 7 13.43 4.43 8.00 21.00 13.00

Create a scatter plot for the following. 15 17 40 40 X Y 19 38 20 35 Run the test for Linear Correlation. What is the (t) test statistic? (Round to 2 decimal places) 20 31 21 32 22 28 22 25 23 25

Which of the following measures the direction of the linear relationship between two variables but does not measure the strength of the relationship?     coefficient of variation correlation coefficient covariance variance

00 T R # 3 6 Question 22 Approximate the median for following GFDT. (Report answer as the midpoint of the class median.) Data Frequency 40-44 1. 45 - 49 1. 50 - 54 3. 55 - 59 8. 12 60 64 69 69 10 22 70 - 74 75-79 80 84 12 median = %3D Submit Question MacBook Air 08 F3 F1 DD F2 F4 F5 i $ 2 4. 9- A

Can you please check my work

Can you please check my work

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A correlation coefficient provides two pieces of information about a relationship between two variables. These are -Strength; direction of relationship - Direction, proportions - Direction, which one causes which - Which one causes which, effect size.    READ FIRST: Show as much of your work in the text box below as possible, and include the rest in your scratch work. Scratch work supports what you write on this exam form. At the minimum, type your answers to each of the following 5 questions A-E in the text box - do not refer me to your scratch work for the answers. Do show your work (on the exam form or scratch work) for the calculations needed to answer B, so partial credit can be given in the case of a math error that throws off your calculations. The best way to do this is inside tables if possible. Total 10 15 You conduct a survey to find out whether talking on a cell phone during a romantic date bothers people. You want to find out if there is a gender difference on this issue,…

Two variables have a strong negative correlation. Which of the following statements is most accurate?a. the data points lie very close to the line of best fitb. the line of best fit must have a large negative slopec. the line of best fit must have a large positive sloped. many data points do not lie very close to the line of best fite. none of the statements are accurate I Know its between a or b but want to double check as I belive its A but see some others saying its B thanks

X           Y                    14         25                    26        28                    19         27                    13         21                    28        31                    23        24                    30        31                    26        27                    19        29 Mean.        22       27 Std. Dev    6.08    3.28 Correlation      0.76 What is the tcritical value using the direct difference approach?