Question
In: Statistics and Probability
2. Using diaries for many weeks, a study on the lifestyles of visually impaired students was...
2. Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep were obtained on a typical day. Researchers found that visually impaired students averaged 9.87 hours of sleep, with a standard deviation of 1.1 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. a. What is the probability that a visually impaired student gets less than 6.1 hours of sleep? b. What is the probability that a visually impaired student gets between 6.5 and 7.89 hours of sleep?
Solutions
orchestra answered 2 years agoRelated Solutions
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted....
Using diaries for many weeks, a study on the lifestyles of
visually impaired students was conducted. The students kept track
of many lifestyle variables including how many hours of sleep
obtained on a typical day. Researchers found that visually impaired
students averaged 8.818.81 hours of sleep, with a standard
deviation of 1.61.6 hours. Assume that the number of hours of sleep
for these visually impaired students is normally distributed.
(a) What is the probability that a visually impaired
student gets less...
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted.
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 8.82 hours of sleep, with a standard deviation of 2.12 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.
(a) What is the probability that a visually impaired student gets...
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted.
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 9.6 hours of sleep, with a standard deviation of 1.21 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed.
(a) What is the probability that a visually impaired student gets...
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted....
Using diaries for many weeks, a study on the lifestyles of
visually impaired students was conducted. The students kept track
of many lifestyle variables including how many hours of sleep
obtained on a typical day. Researchers found that visually impaired
students averaged 9.79 hours of sleep, with a standard deviation of
1.8 hours. Assume that the number of hours of sleep for these
visually impaired students is normally distributed.
(a) What is the probability that a visually impaired student
gets...
Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted....
Using diaries for many weeks, a study on the lifestyles of
visually impaired students was conducted. The students kept track
of many lifestyle variables including how many hours of sleep
obtained on a typical day. Researchers found that visually impaired
students averaged 9.63 hours of sleep, with a standard deviation of
2.92 hours. Assume that the number of hours of sleep for these
visually impaired students is normally distributed.
(a) What is the probability that a visually impaired student
gets...
A journal published a study of the lifestyles of visually impaired students. Using diaries, the students...
A journal published a study of the lifestyles of visually
impaired students. Using diaries, the students kept track of
several variables, including number of hours of sleep obtained in a
typical day. These visually impaired students had a mean of 10.1
hours and a standard deviation of 1.82 hours. Assume that the
distribution of the number of hours of sleep for this group of
students is approximately normal.
Below what hours 90% of the visually impaired students have their
sleep?...
A journal published a study of the lifestyles of visually impaired students. Using diaries, the students...
A journal published a study of the lifestyles of visually
impaired students. Using diaries, the students kept track of
several variables, including number of hours of sleep obtained in
a typical day. These visually impaired students had a mean of
9.06hours and a standard deviation of 2.11 hours. Assume that the
distribution of the number of hours of sleep for this group of
students is approximately normal. Complete parts a through c.
A. Find P(x<6)
b. Find P(8≤x≤10)
c. Find...
A dietary supplement is promising weight loss in 2 weeks using their product. A sample of...
A dietary supplement is promising weight loss in 2 weeks using
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support the claim that there was weight loss after taking the
supplement for 2 weeks? Perform an appropriate hypothesis test
showing necessary statistical evidence to support your
conclusion.
Before
After
175
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185
184...
4. In a study of caffeine and stress, college students indicate how many cups of coffee...
4. In a study of caffeine and stress, college students indicate
how many cups of coffee they drink per day and their stress level
on a scale of 1 to 10 (with higher scores indicating greater
stress). Data is collected from a sample of 10 students. The
Pearson correlation coefficient for the relationship between these
2 variables is r = .43.
(a) Set up your hypotheses using the correct notation
(b) What statistical decision should the researcher make?
JUSTIFY YOUR...
For a certain year a study reports that the percentage of college students using credit cards...
For a certain year a study reports that the percentage of
college students using credit cards was 87%. A college dean of
student services claims that this is too high for her university,
so she randomly selects 50 students and finds that 40 of them use
credit cards. At = 0.10 is she correct?
State:__________________________________ CV: use table E, F, G,
CV=___________________ TV: z, t, or 2 (circle one),
TV=________________ Decide:________________________________
Summary: (remember to circle the correct description...
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