Question
In: Math
A study indicates that 18- to 24- year olds spend a mean of 145 minutes watching...
A study indicates that 18- to 24- year olds spend a mean of 145 minutes watching video on their smartphones per month. Assume that the amount of time watching video on a smartphone per month is normally distributed and that the standard deviation is 15 minutes. Complete parts (a) through (d) below.
a. What is the probability that an 18- to 24-year-old spends less than 115 minutes watching video on his or her smartphone per month?
The probability that an 18- to 24-year-old spends less than 115 minutes watching video on his or her smartphone per month is _______ (Round to four decimal places as needed.)
Solutions
milcah answered 2 years agoRelated Solutions
A study indicates that 18- to 24- year olds spend a mean of 115 minutes watching...
A study indicates that 18- to 24- year olds spend a mean of
115 minutes watching video on their smartphones per month. Assume
that the amount of time watching video on a smartphone per month is
normally distributed and that the standard deviation is 15 minutes.
Complete parts (a) through (d) below.
a. What is the probability that an 18- to 24-year-old spends
less than
95 minutes watching video on his or her smartphone per
month?
(Round to four decimal...
A study indicates that 18- to 24- year olds spend a mean of 115 minutes watching...
A study indicates that 18- to 24- year olds spend a mean of
115 minutes watching video on their smartphones per month. Assume
that the amount of time watching video on a smartphone per month is
normally distributed and that the standard deviation is 10 minutes.
Complete parts (a) through (d) below.
a. What is the probability that an 18- to 24-year-old spends
less than 100 minutes watching video on his or her smartphone per
month?
b.What is the probability...
A study indicates that 18- to 24- year olds spend a mean of 135 minutes watching...
A study indicates that 18- to 24- year olds spend a mean of
135 minutes watching video on their smartphones per month. Assume
that the amount of time watching video on a smartphone per month is
normally distributed and that the standard deviation is 20
minutes.
a.
What is the probability that an 18- to 24-year-old spends less
than 95 minutes watching video on his or her smartphone per
month?
b.
What is the probability that an 18- to 24-year-old...
A study indicates that 18- to 24- year olds spend a mean of 140140 minutes watching...
A study indicates that 18- to 24- year olds spend a mean
of
140140
minutes watching video on their smartphones per month. Assume
that the amount of time watching video on a smartphone per month is
normally distributed and that the standard deviation is
1515
minutes. Complete parts (a) through (d) below.
a.
What is the probability that an 18- to 24-year-old spends less
than
120120
minutes watching video on his or her smartphone per month?The
probability that an 18-...
3. A Nielsen study indicates that 18 to 24 year olds spend a mean of 135...
3. A Nielsen study indicates that 18 to 24 year olds spend a
mean of 135 minutes watching video on their smartphones per month.
Assume that the amount of time watching video on a smartphone per
month is normally distributed and that the standard deviation is 15
minutes. a. What is the probability that an 18-to 24 year old
spends less than 112 minutes watching video on his or her
smartphone per month? b. What is the probability that an...
A Nielsen study indicates that 18-to-34 year olds spend a mean of 93 minutes whatching video...
A Nielsen study indicates that 18-to-34 year olds spend a mean
of 93 minutes whatching video on their smartphones per week. Assume
that the amount of time watching video on a smartphone per week is
normally distributed and that the standard deviation is 15
minutes.
1- What is the probability that an 18- to 34 year old spends
less than 77 minutes watching video on his or her smartphone per
week?
2- What is the probability that an 18- to...
An advertising executive wants to estimate the mean weekly amount of time 18- to 24-year-olds spend...
An advertising executive wants to estimate the mean weekly
amount of time 18- to 24-year-olds spend watching traditional
television in a large city. Based on studies in other cities, the
standard deviation is assumed to be 10 minutes. The executive wants
to estimate, within 99% confidence, the mean weekly amount of time
within ±3 minutes.
a. What sample size is needed?
b. If 95% confidence is desired, how many 18- to 24-year-olds
need to be selected?
c. If she wants...
A study finds that eight year old American children spend an average of 4.9 hours watching...
A study finds that eight year old American children spend an
average of 4.9 hours watching TV or playing video games on Sundays
with a standard deviation of 2.08 hours. Find the probability that
a randomly selected American eight year old would spend between 5
and 6 hours watching television or playing video games on a
Sunday.
Assume the distribution is normal. Draw the distribution and shade
the region in question. Then find the area of the shaded
region.
Watch the documentary Paper Clips (1 hour and 24 minutes). While you are watching the documentary,...
Watch the documentary Paper Clips (1 hour and 24 minutes). While
you are watching the documentary, take notes on these questions.
You will be answering the same questions when you are done
watching. Copy and paste the questions and your answers into the
text entry.
Assignment Expectations:
1. Why did this school embark on this specific project? (2-3
sentences)
2. We have been talking about text sets throughout this course.
What specific items did the teachers use to teach this...
A recent study has shown that 28% of 18-34 year olds check their Facebook/Instagram feeds before...
A recent study has shown that 28% of 18-34 year olds check their
Facebook/Instagram feeds before getting out of bed in the
morning,
If we sampled a group of 150 18-34 year olds, what is the
probability that the number of them who checked their social media
before getting out of bed is:
a.) At least 30?
b.) No more than 55?
c.) between 40 and 49 (including 40 and 49)?
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