Question
In: Statistics and Probability
A random sample of 200 students has been randomly collected to understand the distribution of a...
A random sample of 200 students has been randomly collected to understand the distribution of a schools favourite fruit in Europe. How do I identity the measures of statistical distribution? The fruit given is Banana - 50 students; Orange - 50 students; Apple - 40 students; and Other - 60 students; to make the sample size of 200 students.
Solutions
orchestra answered 2 years agoRelated Solutions
A random sample of 40 students is collected and the number of credit hours taken is...
A random sample of 40 students is collected and the number of
credit hours taken is recorded. The sample mean is computed to be
12.5 hours with a standard deviation of 3 hours. Construct a 95%
confidence interval for the mean credit hours taken. Follow 4-step
procedure.
A random sample of 42 mechanical gears has been collected, and the measurements of Gear-Diameter (mm)...
A random sample of 42 mechanical gears has been collected, and
the measurements of
Gear-Diameter (mm) are found below:
130 131 132 130.5 130 130.2 130.7 130 131.2 133
130 130 131 132 133 133 132 131 312.5 131.5
131.2 132.5 130.2 129.5 131 130 130.2 131.5 131.4 131.6
130.6 130.5 131.1 130 13 130 131 130 130 132
131.2 132
(a) Construct a 94% two-bounds confidence interval on the
diameter.
(b) Construct a 94% lower confidence bound on the...
a. A random number table is used to randomly pick a sample of 118 students from...
a. A random number table is used to randomly pick a sample of
118 students from a population of 2000 students. I would group the
numbers found in the random numbertable in groups of ________.
b. Here is the row I use from the random number table: 11029
39384 59382 31393 38388 37362 01836 2334…………………………….. We will use
multiple labeling, such that each member of the population gets
five labels. Please list the first five members of the sample of...
The sample data below have been collected based on a simple random sample from a normally...
The sample data below have been collected based on a simple
random sample from a normally distributed population. Complete
parts a and b. 5 4 0 5 7 6 9 0 8 4 a. Compute a 98% confidence
interval estimate for the population mean. The 98% confidence
interval for the population mean is from to . (Round to two decimal
places as needed. Use ascending order.) b. Show what the impact
would be if the confidence level is increased to...
Include diagrams and calculations for the following: A.In a recent random sample of 200 students...
Include diagrams and calculations for the following:
A.In a recent random sample of 200 students at a large
university who were recently forced to watch their lectures
on-line, 65 indicated that they preferred on-line lectures as
opposed to the normal in-class lectures. Estimate, with 90%
confidence, the true proportion of all students at this large
university who prefer on-line lectures. (Include a concluding
statement similar to concluding statements from examples already
covered in class.)
B.In a random sample of...
Researchers have collected data from a random sample of six students on the number of hours...
Researchers have collected data from a random sample of six
students on the number of hours spent studying for an exam and the
grade received on the exam as given in Table 6.5.
Table 6.5
Observation
Grade
Number of Hours Studying
1
85
8
2
73
10
3
95
13
4
77
5
5
68
2
6
95
12
d) Find and interpret a 90% confidence interval for the true
population slope parameter.
A social science researcher collected data from a random sample of 400 students at a large...
A social science researcher collected data from a random sample
of 400 students at a large university and found that, on average,
they belonged to 2.6 campus organizations. The standard deviation σ
for the population is 1.8.
Using these data, construct a 95% confidence interval for µ, the
mean number of campus organizations belonged to by the population
of students at this university.
Write a sentence to interpret your confidence interval, making
sure to provide all the important information.
A social science researcher collected data from a random sample of 400 students at a large...
A social science researcher collected data from a random
sample of 400 students at a large university and found that, on
average, they belonged to 2.6 campus organizations. The standard
deviation σ for the population is 1.8.
Using these data, construct a 95% confidence interval
for µ, the mean number of campus organizations belonged to by the
population of students at this university.
Write a sentence to interpret your confidence interval,
making sure to provide all the important information.
e. Suppose a random sample of size 100 is taken from a distribution with mean 200...
e. Suppose a random sample of size 100 is taken from a
distribution with mean 200 and variance 400. What is the
distribution of the sample mean ?%? (State the name and
parameter(s) of the distribution)
f. For a medical test, the probability of testing positive for a
healthy person is 5%. Based on this, can we find the probability of
testing positive for an infected person? If yes, explain how; if
no, explain why.
A researcher collected data from a small random sample of ten students by asking them individually...
A researcher collected data from a small random sample of ten
students by asking them individually how much time (y) they spent
studying and how much time (x) they spent on social media, on one
day during an exam week. Both times were given in hours, rounded to
the nearest half hour. They shown in the table below.
x
5
2.5
3
4.5
2.5
2
3
2
6.5
6
y
2
4.5
2
1
4
3.5
2
4
0
0.5...
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