Question

Many people believe that the average number of Facebook friends is 130. The population standard deviation...

Many people believe that the average number of Facebook friends is 130. The population standard deviation is 36.9. A random sample of 39 high school students in a particular county revealed that the average number of Facebook friends was 150. At =α0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 130?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Many people believe that the average number of Facebook friends is 130. The population standard deviation...
Many people believe that the average number of Facebook friends is 130. The population standard deviation is 38.2. A random sample of 50 high school students in a particular county revealed that the average number of Facebook friendswas 162. At α = 0.05, is there sufficient evidence to conclude that the mean number of friends is greater than 130? Step 1: State hypotheses by filling in the symbol (=, <, >, or not equal) and the population mean: Ho:  μ _____...
An educational researcher sought to determine the average number of friends that student on a particular...
An educational researcher sought to determine the average number of friends that student on a particular college campus made during their first year of school. Questioning a random sample of 50 students completing their freshmen year, he finds a sample mean of 3 friends and a standard deviation of 1. Separately, construct a 95% confidence interval and a 99% confidence interval to estimate the mean number of friends made by the population of college students during their first year on...
You want to estimate the mean number of friends for all Facebook users. How many users...
You want to estimate the mean number of friends for all Facebook users. How many users must be included in the sample if you want to be 95% confident that the sample mean is within seven friends of the population mean? Assume the population standard deviation is 53.
5. Suppose that the average number of Facebook friends users have is normally distributed with a...
5. Suppose that the average number of Facebook friends users have is normally distributed with a mean of 125 and a standard deviation of about 55. Assume fourteen individuals are randomly chosen. Answer the following questions. Round all answers to 4 decimal places where possible. a. What is the distribution of x¯? x¯ ~ N( , ) ______ b. For the group of 14, find the probability that the average number of friends is less than 107. ___ c. Find...
The average number of Facebook postings per person in a single day is 16. Assume the...
The average number of Facebook postings per person in a single day is 16. Assume the standard deviation is 8.2 . A random sample of 150 people is taken. Find the probability that the mean number of photos taken by people in this sample is between 15 and 17 .
A 2014 Pew study found that the average US Facebook user has 338 friends. The study...
A 2014 Pew study found that the average US Facebook user has 338 friends. The study also found that the median US Facebook user has 200 friends. What does this imply about the distribution of the variable "number of Facebook friends"? (You have two attempts for this problem, and five attempts each for the remaining problems) The distribution is normal The distribution is bimodal The distribution is approximately Q3 The distribution is left skewed The distribution is trending The distribution...
Many politicians believe that the Occupy Wall Street protesters are not representative of the average American....
Many politicians believe that the Occupy Wall Street protesters are not representative of the average American. You read that the average annual income of American adults is $40,000. You decide to test his claim by taking a random sample of 40 Occupy protesters. You find an average income of $39,000 and a standard deviation of $2,500 in your sample. Is there sufficient evidence at the alpha=.01 level to conclude that on average income of Occupy Wall Street protesters is significantly...
Operating Costs of an Automobile (Population – Critical Value) The average cost of owning and operating...
Operating Costs of an Automobile (Population – Critical Value) The average cost of owning and operating an automobile is $9122 per year. A random survey of 40 owners revealed an average cost of $9350 with a population standard deviation of $750. Is there sufficient evidence to conclude that the average is greater than $9122. Use α = 0.01. Step 1: State the hypotheses. Step 2: Find the critical value. Step 3: Compute the test value. Step 4: Make the decision....
The average cost of owning and operating an automobile is $8121 per 15000 miles. A random...
The average cost of owning and operating an automobile is $8121 per 15000 miles. A random survey of 40 automobile owners revealed an average cost of $8350 with a population standard deviation of $750. At the one percent level of significance is there sufficient evidence to conclude that the average is greater than $8121? Use critical values to perform your test.
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.2 DVDs per month with a population standard deviation of 0.90 hour. The distribution of DVDs watched per month follows the normal distribution. A random sample of 35 college students revealed that the mean number of DVDs watched last month was 6.20. At the 0.05 significance level, can we conclude that college students watch fewer DVDs a month than high school students? b. State the decision...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT