Question
In: Statistics and Probability
8. The amount of time that a sample of students spends using internet on phone per...
8. The amount of time that a sample of students spends using internet on phone per day is given below. Student Time (in Minutes) Student Time (in Minutes) 1 45 11 42 2 21 12 37 3 26 13 41 4 26 14 43 5 45 15 46 6 37 16 35 7 22 17 31 8 33 18 29 9 26 19 46 10 21 a. Compute the mean & standard deviation b. Compute the median, mode & range.
Solutions
Expert Solution
Solution:
a)
Standard deviation:
---------------------------
b)
orchestra answered 2 years agoRelated Solutions
After 8:00pm on any Thursday, the amount of time a person spends waiting in line to...
After 8:00pm on any Thursday, the amount of time a person spends
waiting in line to get into a well-known pub is a random variable
represented by XX. Suppose we can model the behavior of XX with the
Exponential probability distribution with a mean of waiting time of
44 minutes.
(a) Provide the value of the standard deviation of
this distribution. Enter your answer to two decimals.
σX=σX=
equation editor
minutes
(b) Suppose you are in line to get into...
Exhibit F In order to estimate the average time that students spend on the internet per...
Exhibit F
In order to estimate the average time that students spend on the
internet per day, data were collected for a sample of 36 business
students. Assume the population standard deviation is 2 hours.
Refer to Exhibit F. If the sample mean is 6 hours, then the 95%
confidence interval for the population mean,μ, is
Group of answer choices
4.35 to 7.65
5.67 to 6.33
5.35 to 6.65
6 to 6.65
The amount of time a random person spends watching Netflix is being compared to the time...
The amount of time a random person spends watching Netflix is
being compared to the time that person spends exercising. Times are
in hours per week.
Time on Netflix
Time Exercising
14
7
8
12
3
9
24
2
19
5
11
12
a) Determine the value of the correlation
coefficient and interpret its meaning.
b) Suppose the time on Netflix is being used to
predict the time spent exercising. What would be the equation of
the regression line? Express...
The amount of time a random person spends watching Netflix is being compared to the time...
The amount of time a random person spends watching Netflix is
being compared to the time that person spends exercising. Times are
in hours per week.
Time on Netflix
Time Exercising
14
7
8
12
3
9
24
2
19
5
11
12
a) Determine the value of the correlation
coefficient and interpret its meaning.
b) Suppose the time on Netflix is being used to
predict the time spent exercising. What would be the equation of
the regression line? Express...
The amount of time that a truck spends in waiting at the distribution center for unloading...
The amount of time that a truck spends in waiting at the
distribution center for unloading is a random variable with a mean
of 30 minutes and a standard deviation of 20 minutes. Suppose that
a random sample of 9 trucks is observed. Find the probability that
the average waiting time of trucks is:
(1) Less than 20 minutes
(2) Between 20 and 40 minutes
The amount of time a shopper spends in the supermarket is normally distributed with a mean...
The amount of time a shopper spends in the supermarket is
normally distributed with a mean of 45 minutes with a standard
deviation of 12 minutes. If 10 shoppers are selected, how many of
them will spend less than 35 minutes? Round your answer to 3
decimal places. Do not include units in your answer. 4 points
QUESTION 13 The amount of time a shopper spends in the
supermarket is normally distributed with a mean of 45 minutes with
a...
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics
students study per week and their final exam scores? The results of
the survey are shown below.
Time
16
13
9
14
14
16
0
6
Score
98
82
91
100
86
95
62
83
Find the correlation coefficient:
r=r= Round to 2 decimal places.
The null and alternative hypotheses for correlation are:
H0:H0: ? ρ μ r == 0
H1:H1: ? ρ μ r ≠≠ 0
The p-value is: (Round to four...
What is the relationship between the amount of time statistics students study per week and their...
What is the relationship between the amount of time statistics
students study per week and their test scores? The results of the
survey are shown below. Time 2 5 9 1 4 11 13 11 13 Score 60 61 70
49 72 84 76 80 83 Find the correlation coefficient: r = Round to 2
decimal places. The null and alternative hypotheses for correlation
are: H 0 : = 0 H 1 : ≠ 0 The p-value is: (Round to...
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating...
Suppose for a random sample of 49 CMU students, the mean amount
of time spent eating or drinking per day is 1.58 hours with a S.D.
of 0.62 hours!
What is the Margin of Error at a C.L. of 90%?
What is the right boundary of the C.I. at a C.L. of 90%?
Suppose for a random sample of 49 CMU students, the mean amount of time spent eating...
Suppose for a random sample of 49 CMU students, the mean amount
of time spent eating or drinking per day is 1.58 hours with a S.D.
of 0.62 hours!
a. What is the Standard Error of the estimate of the population
mean?
b. What is the Margin of Error at a C.L. of 90%?
c. What is the right boundary of the C.I. at a C.L. of 90%?
d. At a 98% C.L., if the researcher wants to limit the...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- For Questions 1-3: consider the following code: public class A { private int number; protected String...
- You are tasked with assessing the health department’s intervention program in preventing recurrence of acute alcohol...
- Compare the MOSFET, JFET , and BJT and identify the reasons these devices behave differently. What...
- How would you use SAS Enterprise Miner to create a neural network model of your example?
- Explain the use of neural networking modeling in predictive analytics.
- Current Market Mix of Netflix, as detail as possible, please.
- This is all one question, thank you so much in advance! You must evaluate a proposal...
ADVERTISEMENT