Question
In: Statistics and Probability
It is believed that nearsightedness affects about 8% of all children. In a random sample of...
It is believed that nearsightedness affects about 8% of all children. In a random sample of 194 children, 21 are nearsighted. (a) Construct hypotheses appropriate for the following question: do these data provide evidence that the 8% value is inaccurate? Ho: p = .08 Ha: p > .08 Ho: p = .08 Ha: p ≠ .08 Ho: p = .08 Ha: p < .08 (b) What proportion of children in this sample are nearsighted? 0.1082 (round to four decimal places) (c) Given that the standard error of the sample proportion is 0.0195 and the point estimate follows a nearly normal distribution, calculate the test statistic (use the Z-statistic). Z = 1.44 (please round to two decimal places)
(d) What is the p-value for this hypothesis test?
p = (please round to four decimal places)
Solutions
orchestra answered 2 years agoRelated Solutions
1. It is believed that nearsightedness affects about 8% of all children. In a random sample...
1. It is believed that nearsightedness affects about 8% of all
children. In a random sample of 194 children, 21 are
nearsighted.
(a) Construct hypotheses appropriate for the following question: do
these data provide evidence that the 8% value is inaccurate?
Ho: p = .08
Ha: p ≠ .08
Ho: p = .08
Ha: p < .08
Ho: p = .08
Ha: p > .08
(b) What proportion of children in this sample are
nearsighted?
(round to four decimal places)...
It is generally believed that nearsightedness affects about 15% of children. A school district gives vision...
It is generally believed that nearsightedness affects about 15%
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kindergarten children. Use the empirical rule (68%-95%-99.7% Rule)
to determine what proportion of nearsighted children we might
expect to see in samples of 111 children (I'm not looking for the
number of children). Assume conditions are met! No need to draw the
model, though if you find it easier to do so you may draw it by
hand and attach...
It is known that 12% of children are nearsighted. A random sample of 170 children is...
It is known that 12% of children are nearsighted. A random
sample of 170 children is selected. What is the probability more
than 14% of this sample will be nearsighted?
a.
0.7881
b.
0.2119
c.
0.2266
d.
0.7734
It is known that 12% of children are nearsighted. A random sample of 170 children is...
It is known that 12% of children are nearsighted. A random
sample of 170 children is selected. What is the probability more
than 14% of this sample will be nearsighted?
a. 0.7881
b. 0.7734
c. 0.2119
d. 0.2266
A random sample of American was asked if they believed that everyone has an equal opportunity...
A random sample of American was asked if they believed that
everyone has an equal opportunity to obtain a quality education in
the U.S.A. Result shows below in the table.
Response
less High School
High School
Associate Degree
Bachelor Degree
Graduate Degree
Yes
312
542
31
102
44
No
88
209
22
70
33
At the 0.05 level of significance, test the claim that the
response is independent of a person’s level of education.
I did the work and got...
A random sample of 200 adults is taken from a population of 20000. It is believed...
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In the 1990s, it was generally believed that genetic abnormalities affected about 8% of a large...
In the 1990s, it was generally believed that genetic
abnormalities affected about 8% of a large nation's children. Some
people believe that the increase in the number of chemicals in the
environment has led to an increase in the incidence of
abnormalities, which could have important implications for health
insurance companies. A recent study examined 369 randomly selected
children and found that 40 of them showed signs of a genetic
abnormality.
(a) Which hypotheses should be used to test if...
A random sample of 320 college students were asked if they believed that places could be...
A random sample of 320 college students were asked if they
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A campus researcher asked a random sample of 8 students about how many hours they work...
A campus researcher asked a random sample of 8 students about
how many hours they work per week on average and their grade in
their last math course. She then made a table for hours worked per
week ? and their last math class score ?.
X
11
13
12
22
8
16
12
21
Y
97
76
80
78
87
83
81
77
∑? = 115, ∑? = 659, ∑(??) = 9344, ∑?2 = 1823, ∑?2 =
54,617
a....
make a "narrative" essay about "cell phones in young children how it affects educational development" that...
make a "narrative" essay about "cell phones in young children how
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introduction, thesis, contents (3 arguments) and conclusion,
including references
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