Question
In: Statistics and Probability
For a data set of brain volumes (cm3) and IQ scores of sevenseven males, the linear...
For a data set of brain volumes (cm3) and IQ scores of
sevenseven males, the linear correlation coefficient is
requals=0.9950.995. Use the table available below to find the
critical values of r. Based on a comparison of the linear
correlation coefficient r and the critical values, what do you
conclude about a linear correlation?
LOADING... Click the icon to view the table of critical values
of r.
The critical values are nothing.
(Type integers or decimals. Do not round. Use a comma to
separate answers as needed.)
Solutions
Expert Solution
Null hypothesis : r is not significant.
Alternative hypothesis : r is significant.
We have the table for critical values :
We look for values corresponding to n = 7 in the above table.
Case 1 : When 
Critical values are - 0.87 , 0.87
Since, r = 0.995 does not lie between - 0.87 and 0.87 , we reject null hypothesis and conclude that r is significant.
Case 2 : When 
Critical values are - 0.75 , 0.75
Since, r = 0.995 does not lie between - 0.75 and 0.75 , we reject null hypothesis and conclude that r is significant.
orchestra answered 1 year agoRelated Solutions
A sample of human brain volumes (cm3) is given below. Use the given data values to...
A sample of human brain volumes (cm3) is given below. Use the
given data values to identify the corresponding z scores that are
used for a normal quantile plot, then identify the coordinates of
each point in the normal quantile plot. Construct the normal
quantile plot, then determine whether the data appear to be from a
population with a normal distribution.
1045
1417
1042
1079
1077
1079
1062
961
List the z scores for the normal quantile plot.
A sample of human brain volumes (cm3) is given below. Use the given data values to...
A sample of human brain volumes (cm3) is given below. Use the
given data values to identify the corresponding z scores that are
used for a normal quantile plot, then identify the coordinates of
each point in the normal quantile plot. Construct the normal
quantile plot, then determine whether the data appear to be from a
population with a normal distribution.
1045
1417
1042
1079
1077
1079
1062
961
List the z scores for the normal quantile plot.
A sample of human brain volumes (cm3) is given below. Use the given data values to...
A sample of human brain volumes (cm3) is given below. Use the
given data values to identify the corresponding z scores that are
used for a normal quantile plot, then identify the coordinates of
each point in the normal quantile plot. Construct the normal
quantile plot, then determine whether the data appear to be from a
population with a normal distribution. 1067 1075 955 1415 1075 1050
1072 1033
IQ and Lead Exposure Data Set 7 “IQ and Lead” in Appendix B lists fullIQ scores...
IQ and Lead Exposure Data Set 7 “IQ and Lead” in Appendix B
lists fullIQ scores for a random sample of subjects with low lead
levels in their blood and an-other random sample of subjects with
high lead levels in their blood. The statisticsare summarized
below. Use a .05 significance level to test the claim that IQ
scores forindividuals with low blood lead levels is higher than IQ
scores for individuals with highblood lead levels. Round to 3
decimal places.Low...
Is there a relationship between brain size and intelligence? The Full Scale IQ scores (FSIQ) and...
Is there a relationship between brain size and intelligence?
The Full Scale IQ scores (FSIQ) and brain sizes (in pixels, as
measured by MRI scans) of 39 subjects were measured. Researchers
wished to study the relationship between FSIQ and brain size, using
brain size to predict FSIQ. However, the researchers believed that
brain size is also dependent on body size and that some adjustment
for body size might be necessary in order to understand the
relation between brain size and...
) Scores on an IQ test are normally distributed. A sample of 20 IQ scores had...
) Scores on an IQ test are normally distributed. A sample of 20
IQ scores had standard deviation s = 8. The developer of the test
claims that the population standard deviation is ı = 12. Do these
data provide sufficient evidence to contradict this claim? Use the
Į = 0.05 level of significance.
3)
A) Reject H0. The population standard deviation appears to differ
from 12. B) Do not reject H0. There is insufficient evidence to
conclude that the...
A sample of human brain volumes is given below. Use the given data values to determine...
A sample of human brain volumes is given below. Use the given
data values to determine if the sample form a population what is
normally distributed (round the final answer to two decimal
places).
1131 1131 1254 1089 1065 1016 1068 1199
Please show work thank you.
Scores on an IQ test are normally distributed. A sample of 10 IQ scores had standard...
Scores on an IQ test are normally distributed. A sample of 10 IQ
scores had standard deviation s=7. (a) Construct a 98% confidence
interval for the population standard deviation . Round the answers
to at least two decimal places. (b) The developer of the test
claims that the population standard deviation is 9. Does this
confidence interval contradict this claim? Explain
Listed in the data table are IQ scores for a random sample of subjects with medium...
Listed in the data table are IQ scores for a random sample of
subjects with medium lead levels in their blood. Also listed are
statistics from a study done of IQ scores for a random sample of
subjects with high lead levels. Assume that the two samples are
independent simple random samples selected from normally
distributed populations. Do not assume that the population standard
deviations are equal. Complete parts (a) and (b) below. Use a
0.10 significance level for both...
Listed in the data table are IQ scores for a random sample of subjects with medium...
Listed in the data table are IQ scores for a random sample of
subjects with medium lead levels in their blood. Also listed are
statistics from a study done of IQ scores for a random sample of
subjects with high lead levels. Assume that the two samples are
independent simple random samples selected from normally
distributed populations. Do not assume that the population standard
deviations are equal. Complete parts (a) and (b) below. Use a
0.01 significance level for both...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Assessment 3 – Graphical LP &nbs
- In linux , Using a simple text editor, create a text file with the following name...
- c++ Please explain why its wrong. The findDisorder function is supposed to find the first item...
- Strong corporate culture, ability to adapt is best blueprint for going global: Lenovo The blueprint for...
- Blaze Manufacturing Company is using a weighted criteria evaluation system to certify suppliers. Oronto Enterprise, Mintco Company...
- Problem 4. (10 pts) Voltage amplifiers are available with Avoc = 8 V / V, Rin...
- C A S E S T U DY 5-1 Accountabilities, Objectives, and Standards Below is an...
ADVERTISEMENT