According to a recent survey conducted at a local college, we found students spend an average...

According to a recent survey conducted at a local college, we found students spend an average of 19.5 hours on their smartphone per week, with a standard deviation of 3.5 hours. Assuming the data follows the normal distribution.

a) How many percent of students in this college spend more than 15 hours on their smartphone per week?

b) If we randomly select 12 students, what is the probability that the average of these students spending on the internet is more than 20 hours per week?

c) What is the 36th percentile for number of hours spending on their smartphone per week?

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

A nationwide survey of college students was conducted and found that students spend two hours per...

A nationwide survey of college students was conducted and found that students spend two hours per class hour studying. A professor at your university wants to determine whether the time students spend at your university is significantly different from the two hours. A random sample of 36 statistics students is carried out and the findings indicate an average of 1.75 hours. Assume a populatoin standard deviation of 0.5 hours. Using a level of significance of 0.05: 1. Construct a 95%...

A survey of college students reported that they spend an average of $9.50 a day on...

A survey of college students reported that they spend an average of $9.50 a day on dinner with a standard deviation of $3. What is the probability that 100 randomly selected college students will spend less than $10.00 on average for dinner? Round your answer to 4 decimal places.

1. A company conducted a marketing survey of college students and found that 225 own a...

1. A company conducted a marketing survey of college students and found that 225 own a bicycle and 77 owned a car. If 23 of those surveyed own both a car and a bicycle, how many interviewed have a car or a bicycle? 2. A standard deck of cards consists of four suits (clubs, diamonds, hearts, and spades), with each suit containing 13 cards (ace, two through ten, jack, queen, and king) for a total of 52 cards in all....

A national study found that college students spend an average of 150 ( = 150) studying...

A national study found that college students spend an average of 150 ( = 150) studying during their first semester. A group of 41 AAMU students participated in The AAMU summer bridge students studied an average of 146 hours (M = 146) during their first semester. With a sum of squared deviations of 2,367 (SS – 2,367) and a significance level of α = .01, did the summer bridge students differ in the number of hours studied compared to college...

A survey of 196 randomly selected college students at a local university found that only 78%...

A survey of 196 randomly selected college students at a local university found that only 78% of them checked their college email on a regular basis. The standard deviation is 7.4. Construct the confidence interval for the population proportion with a 90% confidence level.

According to the recent survey conducted by Sunny Travel Agency, a married couple spends an average...

According to the recent survey conducted by Sunny Travel Agency, a married couple spends an average of $500 per day while on vacation. Suppose a sample of 64 couples vacationing at the Resort XYZ resulted in a sample mean of $490 per day and a sample standard deviation of $100. Develop a 95% confidence interval estimate of the mean amount spent per day by a couple of couples vacationing at the Resort XYZ.

According to the College Board, undergraduate students spend on average more than $1000 per year on...

According to the College Board, undergraduate students spend on average more than $1000 per year on textbooks.* As a college student, you've suffered the high prices of textbooks, and you're going to do something about it! Let's say that after you graduate, you decide to start your own textbook publishing company. You will need to find a way to appeal to both professors and students with high quality and reasonably-priced products, but you've also got to make a profit. Feel...

College students Suppose a recent study of 1,000 college students in the U.S. found that 8%...

College students Suppose a recent study of 1,000 college students in the U.S. found that 8% of them do not use Facebook. Which of the following describes the population for this example? -All College students in the US -The 1000 college students who participated in the study -all college students in the US who do not use facebook -The 8% of college students who do not use facebook Which of the following defines what is meant by a control group...

2.5 7.In a survey of college students, each of the following was found. Of these students,...

2.5 7.In a survey of college students, each of the following was found. Of these students, 356356 owned a tablet, 294294 owned a laptop, 280280 owned a gaming system, 195195 owned a tablet and a laptop, 199199 owned a tablet and a gaming system, 137137 owned a laptop and a gaming system, 6868 owned a tablet, a laptop, and a gaming system, and 2626 owned none of these devices. Complete parts a) through e) below. a) How many college students...

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? e. What is the...

Subjects