Suppose we are interested in knowing the effect of average number of cigarettes smoked by women...

Suppose we are interested in knowing the effect of average number of cigarettes smoked by women during pregnancy on infant birth weight ( in ounces). Suppose OLS regression estimates for the intercept and the slope coefficient are given as 119.77 and -.514 respectively.

Interpret and

Expert Solution

Let

y: Weight of infant in ounces

x:average number of cigarette smoked during pregnancy

The estimated regression line is given by:

initially we'll interpret the intercept:

If the average number of cigarettes consumed by women during pregnancy was zero that is if x is zero then the estimated weight of the newborn would be 119.77. As the average number of cigarettes can't be negative the maximum weight of the newborn would be119.77 ounces that too if 0 number of average cigarettes are consumed.

Now to interpret the slope value

It can be seen that the value of slope is -0.514 that is it is negative which implies that the weight and the average number of cigarettes are negatively related to each other that is higher the number of average cigarette consumption lower would be the weight of th newborn.

For a unit increase in the average consumption of the number of cigarettes during pregnancy the weight of the newborn is expected to decrease by 0.514 pounds.

orchestra answered 2 years ago

Suppose you are interested in knowing the average cholesterol level of all women between the ages...

Suppose you are interested in knowing the average cholesterol level of all women between the ages of 21 and 30 who live in College Station. Everyone in a class (100 students) takes a random sample of 50 females in the College Station area between the ages of 21 and 30. Each student calculates the average cholesterol in their sample. Jenna is one of the students in this class and she makes a histogram of the 50 cholesterol levels in her...

Suppose we are interested in estimating the average number of customers in the supermarket. On average,...

Suppose we are interested in estimating the average number of customers in the supermarket. On average, there are 15 customers entering the supermarket every 5 minutes. And on average, a typical customer spends about 20 minutes in the supermarket (from entering to exiting the market). a. Calculate the average number of customers in the supermarket. b. About 20% of customers leave without making a purchase. On average, a customer spends about 5 minutes in the checkout area. Estimate the average...

1)A researcher believes that there is a correlation between the number of cigarettes smoked per day...

1)A researcher believes that there is a correlation between the number of cigarettes smoked per day and intelligence. The following data were collected on 15 smokers. Find Pearson's r. Number of cigarettes (X) IQ score (Y) 7 10 49 6 41 15 38 5 37 12 19 4 35 19 40 11 1 3 10 3 18 22 21 17 15 12 7 9 38 13 n=15 Sum of X= 376 Sum of Y=161 Sum...

According to the Centers for Disease Control, the mean number of cigarettes smoked per day by...

According to the Centers for Disease Control, the mean number of cigarettes smoked per day by individuals who are daily smokers is 18.1. A researcher claims that retired adults smoke less than the general population of daily smokers. To test this claim, she obtains a random sample of 25 retired adults who are current smokers, and records the number of cigarettes smoked on a randomly selected day. The data result in a sample mean of 16.8 cigarettes and a standard...

Suppose 31 pregnant women are sampled who smoke an average of 22 cigarettes per day with...

Suppose 31 pregnant women are sampled who smoke an average of 22 cigarettes per day with a variance of 144.00. a) What is the probability that the pregnant women will smoke an average of 20 cigarettes or more? probability = b) What is the probability that the pregnant women will smoke an average of 21 cigarettes or less? probability = c) What is the probability that the pregnant women will smoke an average of 18 to 24 cigarettes? probability =...

A. As a health policy expert, you are interested in knowing whether men and women in...

A. As a health policy expert, you are interested in knowing whether men and women in the United States differ in the frequency they visit doctors when sick. So you conduct a survey of 134 people and ask them how often they visit a doctor when they are sick. The results from this sample are as follows: Frequency visit doctor Sex Always Sometimes Never Total Men 13 41 27 81 Women 24 19 10 53 Total 37 60 37 134 Perform...

Consider the following regression model, relating birth weight to the number of cigarettes smoked during pregnancy:...

Consider the following regression model, relating birth weight to the number of cigarettes smoked during pregnancy: bwgt=B0+B0cigs+ε (a) Do you think that cigsi and εi are correlated? Explain why or why not. Would the OLS estimator be BLUE in this case? (b) Suppose the mother’s level of education is also related to birth weight. However, you still estimate the equation above, using only cigsi as an independent variable. Do you think the OLS estimator B1 accurately estimates the association between...

Suppose we are interested in the effect of drinking on student achievement. We survey students at...

Suppose we are interested in the effect of drinking on student achievement. We survey students at the University of Rhode Island about their drinking habits - the number of times they “binge” drank (had 5+ drinks in one sitting) in the previous semester - and their previous semester’s GPA. We also have data on their gender, race, parent’s education, and family income. If we estimate the following regression: GP Ai = β0 + β1BingeEventsi + γXi + i Where GP...

A community health association is interested in estimating the average number of maternity days women stay...

A community health association is interested in estimating the average number of maternity days women stay in the local hospital. A random sample is taken of 36 women who had babies in the hospital during the past year. The following numbers of maternity days each woman was in the hospital are rounded to the nearest day. 3 3 4 3 2 5 3 1 4 3 4 2 3 5 3 2 4 3 2 2 1 6 3 4...

Marketing companies are interested in knowing the population percent of women who make the majority of...

Marketing companies are interested in knowing the population percent of women who make the majority of household purchasing decisions. a) When designing a study to determine this population proportion, what is the minimum number you would need to survey to be 90% confident that the population proportion is estimated to within 0.05? (Round your answer up to the nearest whole number.) b) Suppose a marketing company did do a survey. They randomly surveyed 200 households and found that in 120...

Question