The Student Monitor surveys 1200 undergraduates from 100 colleges semiannually to understand trends among college students. Recently, the Student Monitor reported that the average amount of time spent per week on the Internet was 19.0 hours. Assume that the standard deviation is 5.5 hours. Give a 95% confidence interval for the mean time spent per week on the Internet.

Question
  1. The Student Monitor surveys 1200 undergraduates from 100 colleges semiannually to understand trends among college students. Recently, the Student Monitor reported that the average amount of time spent per week on the Internet was 19.0 hours. Assume that the standard deviation is 5.5 hours. Give a 95% confidence interval for the mean time spent per week on the Internet. 

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Other

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: How hot is the air in the top (crown) of a hot air balloon? Information from Ballooning: The Complet...

A: a)Given:

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone densi...

A: The area of the shaded region is 0.7277 or 72.77% and it is calculated below:

Q: Births are approximately uniformly distributed between the 52 weeks of the year. 1 1 s x53 f(x) 52 (...

A: Solution:Continuous uniform distribution:A random variable X is said to have the rectangular distrib...

Q: Facebook provides a variety of statistics on its Web site that detail the growth and popularity of t...

A: It is given that mean and standard deviation are 28 and 5, respectively.

Q: In this boxplot the numeric variable box office gross (sales) of films is plotted by the genre of th...

A: As per the questiona)From the box plot, Among the SciFi, Asian Market has the highest Inter Quantile...

Q: The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation...

A: Click to see the answer

Q: You work for a soft-drink company in the quality control division.  You are interested in the standa...

A: a) The sample standard deviation is and it is obtained below: From the given information, there are ...

Q: A researcher wants to investigate the relationship between number of hours spent outdoors and the he...

A: Solution:Step 1:After copying the given data in to EXCEL software,Go to Data > Data analysis >...

Q: Assume that random guesses are made for eleven multiple choice questions on a medical admissions​ te...

A: Click to see the answer

Q: A certain state has the highest high school graduation rate of all states at 85​%.   a. In a random...

A: Solution: We are given that a certain state has the highest high school graduation rate of all state...

Q: Today, the waves are crashing onto the beach every 5.3 seconds. The times from when a person arrives...

A: Let X be the random variable uniformly distributed between 0 and 5.3 seconds.Denote X as the time fr...

Q: Four students are randomly selected from an algebra class and asked whether they suffer from math an...

A: Introduction:On random selection, 4 students are selected into the sample.When asked whether they ha...

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, above what p...

A: Solution:From the given information, the proportion of African American is 0.13, random sample of si...

Q: I don't understand how to solve this.

A: Solution: We are given that a warehouse employs 26 workers on first shift, 15 workers on second shif...

Q: The correlation coefficient for this relationship between the X variable and the Y variable would pr...

A: Correlation coefficient:It measures the relationship between two variables. The range of correlation...

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers h...

A: From the given information,Mean and standard deviations are 6.4 and 0.8Smallest head breadths 1.3%=0...

Q: Find the standard deviation of the distribution in the following situations. (a) MENSA is an organiz...

A: a)It is given that the mean is 100.The IQs in the top 2% of the population represents the area of 0....

Q: Please show TI 84 steps

A: Computation of mean and standard deviation:Here, n=100.The mean and standard deviation is calculated...

Q: Comparison between two diets in obese children, one low-fat and one low-carb 8 week intervention wit...

A: A).The standard deviations of low-fat and low-carb groups are 8.4 and 7.7 respectively. The sample s...

Q: The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distribut...

A: Solution:a.The 28th percentile for the number of chocolate chips in a bag is obtained below:From the...

Q: For a normal population with a mean of m=80 and a standard deviation of 10, what is the probability ...

A: It is given that the mean and standard deviation are 80 and 10, respectively.

Q: Which is better and corresponds to the higher relative position, a score of 92 on a test with a mean...

A: Solution:From the given information, score of 92 on a test with standard deviation of 15 and mean of...

Q: What is the value of ΣX for the scores 2, 5, 3?

A: Given data2,5, 3ΣX = 2+5+3 = 10

Q: Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a vari...

A: Consider X be a random variable which, follows normal distribution, indicates the life span of a mon...

Q: 3. (a) Based on the random sample Y1 = 5.2, Y2 4.6, use the method of maximum likelihood to estimate...

A: Note:The pdf in Part (b) will be fY (y; θ1, θ2) = 1/(θ2 – θ1) if θ1 ≤ y ≤ θ2­. We have solved using ...

Q: Please show TI 84 steps

A: Click to see the answer

Q: Today, the waves are crashing onto the beach every 5.3 seconds. The times from when a person arrives...

A: Let X be random variable uniformly distributed between 0 and 5.3 seconds.Denote X as the time from a...

Q: The GPA's of all students enrolled at a large university have an appromimately normal distribution w...

A: It is given that the GPA of students enrolled at university is normally distributed with mean 3.02 a...

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final ex...

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: #2: Let X1, X2 and X3 an independent and identically distributed (i.i.d.) random sample taken from a...

A: Let X1, X2 and X3 an independent and identically distributed (i.i.d) random sample taken from a dist...

Q: Births are approximately uniformly distributed between the 52 weeks of the year. 1 1 sxs53 f(x) = 52

A: Solution:Continuous uniform distribution:A random variable X is said to have the rectangular distrib...

Q: Please show TI 84 steps

A: Consider X to be the random variable, defined as the lead level in water specimens with sample mean ...

Q: About 1% of the population has a particular genetic mutation. 400 people are randomly selected.Find ...

A: From the given information,x is the random variable that follows binomial distribution

Q: 6. Suppose a researcher used data on a group of third year students at MIT to estimate the following...

A: According to the provided information, the fitted regression line is

Q: Find the area of the shaded region. The graph depicts the standard normal distribution of bone densi...

A: The required area is the right tailed probability of a standard normal distribution greater than –1....

Q: Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   A drug i...

A: GivenThe total number of patients treated with drug = 4122number of patients developed adverse react...

Q: For the data in the following table, what is the value of ΣX?​ X   f 4   2 3   2 2   4 1   2

A: The given table is a frequency table.

Q: State the null and alternative hypothesis for the following: a) The average SAT in the state is repo...

A: a)Formulation of hypothesisNull Hypothesis: - mean for the local district is equal to 1010Alternativ...

Q: Consider the following data: x −4 −3 −2 −1 0 P(X=x) 0.1 0.1 0.1 0.3 0.4   Find the e...

A: Given Data and calculation for the Expected value is shown below

Q: Find the area under the standard normal distribution to the left of z=0

A: It is givne that the z-score is 0.

Q: Use the standard normal distribution (aka z distribution where mu = 0 and sigma = 1) to determine th...

A: The middle 95% of the data is,

Q: SAT scores (out of 2,400) are normally distributed with a mean of 1,500 and a standard deviation of ...

A: It is given that the mean and standard deviation are 1,500 and 300, respectively.

Q: The College Board National Office recently reported that in 2011-2012, the547,038 high school junior...

A: The given information is:

Q: Find the following probabilities  a.) P(Z ≤ -1.25) b.) P(Z > 1.45)

A: a)Here probability of Z is less than or equal to –1.25 represents the area to the left of –1.25.

Q: which of the following groups of scores exhibits the least variability? A. 2,4,6,8,10,12 B. 2,3,4,10...

A: Enter the data in excel as shown below:

Q: Give an example of two independent samples. For example in testing whether a new drug works, the tre...

A: There are many applications based on the independent samples in a continuous scale. The independent ...

Q: Assume that a national fitness study reports that 5% of millenials exercise daily. Suppose that a re...

A: Binomial distribution:The binomial distribution gives the probability of number of successes out of ...

Q: In a recent study on world​ happiness, participants were asked to evaluate their current lives on a ...

A: It is given that the mean and standard deviation are 4.9 and 2.5, respectively.

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may var...

A: (a) Computation of point estimate for p:Let p be the proportion of all permanent dwellings on the en...

Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample nine people from t...

A: From the given information, the population has a mean of 75 and a standard deviation of 15. And the ...