4. A researcher wants to investigate whether the spice level in food influences water consumption in a restaurant. He wants to run a regression model for the same. Write the equation of the model he should run.
Equation of model will be the equation of straight line equation because here is one independent variable which is spice level in food. Let it be x.
Here dependent variable is water consumption. Let it be y.
Hence the linear regression model and it's it's equation is
y=mx+b
Where m is the slope and b is the intercept
4. A researcher wants to investigate whether the spice level in food influences water consumption in...
A researcher wants to investigate the impact of providing pain killers to rickshaw drivers (n=350) in India on their alcohol consumption. In an RCT experiment, she runs this model where Pain_Killer is 1 if given free pain killers or 0 otherwise and Alcohol_Consi is amount of daily alcohol consimption for each rickshaw driver. Alcohol_Consi = B0 + B1Pain-Killer+ui Is there anything "Wrong" with this equation?
A social researcher wants to investigate the level of anxiety that people have based on the individual area of residence (urban vs. rural). The researcher uses alpha level of .05 to determine whether there is a significant difference in the level of anxiety between people who live in rural areas and people who live in urban areas. The data is presented in the table below. Rural Urban 14 13 8 7 n 15 15 a. State the null and alternative...
Please answer all parts. Thank you.
1. The owner of the food chain Lobster Grill wants to investigate the factors that affect sales at their beach front restaurants. She chooses four variables as estimators of sales: # of parking spaces near the restaurant, distance of the restaurant from the beach (measured in miles), # of workers, and whether or not it is the summer season. The regression equation is Predicted Sales 640.39 Parking 1.6 Distance +1.4 Workers + 2.25 Summer...
] A marketing research firm wants to investigate the relationship between chip consumption and whether a person likes to watch professional football on television. One hundred randomly selected people are asked whether they eat chips and whether they watch football on television. The following results are obtained: Watches football Does not watch football Totals Eats chips 20 45 65 Does not eat chips 5 30 35 Totals 25 75 100 1) State the null and alternative hypotheses [1 mark]: ________________________________________________________________________________________...
A researcher wants to test whether there is a relationship between education level and smoking status. So the researcher collects some data and produces the following Minitab output. Find the missing p-value. ------------------------------------------------------------- Tabulated statistics: smokingstatus2, edlevel2 Rows: smokingstatus2 Columns: edlevel2 H N All D ? 30 67 ? ? ? S 6 ? ? ? ? ? All ? ? ? Cell Contents: Count Expected count Chi-Sq = 2.250, DF = ?, P-Value = ? answer to 4 decimals.
Help & explain please
Regression 1. A researcher is willing to investigate whether there is any linear relation bet ween income (x) in thousand dollars and food expenditures (y) in hundred dollars. A sample data on 7 households given the table below was collected. Assuming that a linear model is used to solve the problem. r-3-D) r-I 83 24 13 61 15 17 1. Write down the linear model 2. Write down the fitted regression line and Interpret the slope...
21) A researcher wants to know whether there is a difference in the physical activity level of children during the morning and afternoon. He observes a total of 40 children (20 boys and 20 girls) from randomly selected schools during morning and afternoon recess and gives each child a score (out of 50) based on how much of the time they spend sitting, standing, walking or running. Each child receives a score in the morning and another in the afternoon....
PREDICTION (REGRESSION) – Chapter 12 3. A researcher was interested in whether there was a relationship between stress and depression scores obtained from emergency health care providers. The data from 10 emergency workers are below. This is the same data you calculated a correlation on in Question 1. We are trying to use stress scores (IV or Predictor) to predict depression scores (DV or outcome). Using SPSS, calculate a linear regression model: Y = a+b1X1 where Y is Depression and...
A researcher wants to test whether a certain sound will make rats do worse on learning tasks. It is known that an ordinary rat can learn to run a particular maze correctly in 19 trials, with a standard deviation of 5.(The number of trials to learn this maze is normally distributed.) The researcher now tries an ordinary rat in the maze, but with sound. The rat takes 35 trials to learn the maze. Complete parts a and b below. (a)...
3. A researcher was interested in whether there was a relationship between stress and depression scores obtained from emergency health care providers. The data from 10 emergency workers are below. This is the same data you calculated a correlation on in Question 1. We are trying to use stress scores (IV or Predictor) to predict depression scores (DV or outcome). Using SPSS, calculate a linear regression model: Ý a + b X where Y is Depression and X, is stress....