Question
In: Statistics and Probability
Nine boys and ten girls were tested to determine if there is a difference in the...
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Nine boys and ten girls were tested to determine if there is a
difference in the average number of days that the child can survive without Internet. The boys averaged 11 days with a standard deviation of 2 days while the girls averaged 13 days with a standard deviation of 3 days. What can be concluded? (Use alpha=0.05). |
Solutions
orchestra answered 1 year agoRelated Solutions
Wilcoxon Rank-Sum Test Is there a difference between Girls and Boys on number of books read?...
Wilcoxon Rank-Sum Test
Is there a difference between Girls and Boys on number of books
read?
Boys 12, 5, 13, 3, 11
Girls 4, 10, 9, 7, 6
To relate the stopping distance of a car to its speed, ten cars were tested at...
To relate the stopping distance of a car to its speed, ten cars
were tested at five different speeds, two cars at each speed. The
following data were obtained.
Speed x (mph) 20 20 30 30 40 40 50 50 60 60
Stop. Dist. y (ft) 16.3 26.739.2 63.5 65.7 98.4 104.1 155.6
217.2 160.8
a) Fit a least-squares linear equation to these data. Plot the
residuals against the speed.
b) Comment on the goodness of the fit based on...
30 school age girls and 30 school age boys were surveyed to see who spend more...
30
school age girls and 30 school age boys were surveyed to see who
spend more time playing video games. Among girls, the mean hours
spent on video games per week is 15.6 and among boys the mean was
43.4. The standard deviation is 10.17 for girls and 39.64 for the
boys. Can you conclude that the mean length in time school age
girls play video games less than the mean lenght in time of school
age boys? Use a...
In a sample of families with 6 children each, the distribution of boys and girls is...
In a sample of families with 6 children each, the distribution
of boys and girls is as shown in the following table:
Number
offamilies
10
60
147
202
148
62
10
Number of girls
0
1
2
3
4
5
6
Number of boys
6
5
4
3
2
1
0
Part A) Calculate the chi-square value to test
the hypothesis of a boy-to-girl ratio of 1:1. (Express your answer
using three decimal places)
Part B) Are the numbers of...
(a) There are 5 boys and 2 girls waiting in a straight line for the school...
(a) There are 5 boys and 2 girls waiting in a straight line for
the school bus. How many ways
can the queue be arranged such that two girls are not standing next
to each other?
(b) There are 7 boys and 5 girls to be assigned into different
groups. Answer the following:
i) Suppose that the 12 people are divided into 3 groups so that the
number of people
in each group is 2, 4, and 6. How many...
A. For the physical development of adolescents, describe the features of puberty in boys and girls....
A. For the physical development of adolescents, describe the
features of puberty in boys and girls.
B. Discuss body image issues that can occur at this
time(adolescents) in a person’s life and offer your opinion on the
best way to address this.
Two types of medication for hives are being tested to determine if there is a difference...
Two types of medication for hives are being tested to determine
if there is a difference in the proportions of adult
patient reactions. Twenty out of a random sample
of 200 adults given medication A still had hives 30
minutes after taking the medication. Twelve out of
another random sample of 180 adults given
medication B still had hives 30 minutes after taking the
medication. Test at a 1% level of significance.
1) For this hypothesis test, the null and...
Two types of medication for hives are being tested to determine if there is a difference...
Two types of medication for hives are being tested to determine if
there is a
difference in the proportions of adult patient reactions.
Twenty
out of a random
sample of 200
adults given medication A still had hives 30 minutes after taking
the medication.
Twelve
out of another
random sample of 180 adults
given medication B still had hives 30 minutes after taking the
medication. Test at a 1% level of significance.
1. (Write all answers as a decimal rounded...
Below is the the number of hours of TV watched by boys and girls per week....
Below is the the number of hours of TV watched by boys and girls
per week. Using the data on the number of hours of TV viewing, test
the hypothesis that the number of hours of TV watched by girls is
less than 7.4 hours per week at a 2% significance
level.
State the null hypothesis, H0 and the alternative
hypothesis, H1
Observation
Number of hours of TV viewed by Boy
Number of hours of TV viewed by Girl
1...
Below is the the number of hours of TV watched by boys and girls per week....
Below is the the number of hours of TV watched by boys and girls
per week. Using the data on the number of hours of TV viewing, test
the hypothesis that the number of hours of TV watched by girls is
less than 7.4 hours per week at a 2% significance
level.
Determine the critical values that divide the rejection and
nonrejection regions
Observation
Number of hours of TV viewed by Boy
Number of hours of TV viewed by Girl...
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