Amy is testing to see if UCI students are smarter than average. She gets a sample...
Amy is testing to see if UCI students are smarter than average. She gets a sample of 20 UCI students. Their average IQ is 118. The average IQ of all people is 100; therefore, the null hypothesis is µ = 100. We are testing to see if the mean is 100. Precisely what mean are we talking about? Explain who it is the mean of.
Homework Answers
H0: Population Mean µ = 100
H1: Population Mean µ not = 100
Let the los be alpha = 5%
Critical z: 1.6449
P-Value: 0.0000
Here Z value is greater than Z critical value and P-value >
alpha 0.05 so we reject H0
Thus we conclude that Population Mean µ not = 100 i.e. The average IQ of all people is not 100
Add Answer to:
Amy is testing to see if UCI students are smarter than average.
She gets a sample...
A college professor claims that the entering class this year appears to be smarter than entering...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 22 this year's entering students and finds that their mean IQ score is 119, with standard deviation of 15. The college records indicate that the mean IQ score for entering students from previous years is 112. If we assume that the IQ scores of this year's entering class are normally distributed, is there enough...
A college professor claims that the entering class this year appears to be smarter than entering...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 13 of this year's entering students and finds that their mean IQ score is 119, with standard deviation of 11. The college records indicate that the mean IQ score for entering students from previous years is 112. If we assume that the IQ scores of this year's entering class are normally distributed, is there...
A college professor claims that the entering class this year appears to be smarter than entering...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 16 of this year's entering students and finds that their mean IQ score is 116, with standard deviation of 10. The college records indicate that the mean IQ score for entering students from previous years is 113. If we assume that the 10 scores of this year's entering dass are normally distributed, is there...
Question 16 6 pts A researcher is studying the possible effect that a certain medication administered...
Question 16 6 pts A researcher is studying the possible effect that a certain medication administered to children has on brain development. She decides to measure the effect by analyzing IQ scores of individuals who took the medication as children. She is working under the assumption that IQ scores in this population are normally distributed with a standard deviation of 15, just as in the general population. The researcher collects a sample of 40 individuals who took the medication as...
Please Help! Need to confirm my answer. You wish to test the claim that the average...
Please Help! Need to confirm my answer. You wish to test the claim that the average IQ score is less than 100 at the .01 significance level. You determine the hypotheses are: Ho: μ = 100 H1: μ < 100 You take a simple random sample of 100 individuals and find the mean IQ score is 95.7, with a standard deviation of 16. Let's consider testing this hypothesis two ways: once with assuming the population standard deviation is not known...
Need a little help. Please help You wish to test the claim that the average IQ...
Need a little help. Please help You wish to test the claim that the average IQ score is less than 100 at the .10 significance level. You determine the hypotheses are: Ho : μ = 100 H 1 : μ < 100 You take a simple random sample of 41 individuals and find the mean IQ score is 97.2, with a standard deviation of 14.9. Let's consider testing this hypothesis two ways: once with assuming the population standard deviation is...
QUESTION 13 A middle school art teacher knows that the average on a creativity test is...
QUESTION 13 A middle school art teacher knows that the average on a creativity test is µ = 200 with a standard deviation ofσ = 50. She wants to know if the average of M = 215 for a sample of 49 students from her classes is higher than 200. Compute the z score (the test statistic) for the sample mean. a. +0.30 b. +0.31 c. +2.10 d. +14.70 QUESTION 14 A middle school art teacher knows that the average...
Garrison Keller claims the children of Lake Wobegon are above average. You take a simple random...
Garrison Keller claims the children of Lake Wobegon are above average. You take a simple random sample of 9 children from Lake Wobegon and measure their intelligence with a Wechsler test and find the following scores: {116, 128, 125, 119, 89, 99, 105, 116, and 118}. The mean of this sample (? ̅) is 112.8. We know Wechsler scores are scaled to be normally distributed with a mean of 100 and standard deviation of 15. Is this sample mean sufficiently...
A college professor claims that the entering class this year appears to be smarter than entering classes from previ...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 22 of this year's entering students and finds that their mean 1Q score is 119, with standard deviation of 15. The college records indicate that the mean 1Q score for entering students from previous years is 112. If we assume that the 1Q scores of this year's entering class are normally distributed, is there...
(6 pts) A psychologist who needs two groups of students for a learning experiment decides to...
(6 pts) A psychologist who needs two groups of
students for a learning experiment decides to select a random
sample of female college
students and male college students. Before the experiment, the
psychologist administers an IQ test to both groups to determine if
there is a significant difference in their mean IQ scores. The
population standard deviation for this IQ test is know to be
for both female and male populations. If the sample
mean IQ score of the female...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 22 this year's entering students and finds that their mean IQ score is 119, with standard deviation of 15. The college records indicate that the mean IQ score for entering students from previous years is 112. If we assume that the IQ scores of this year's entering class are normally distributed, is there enough...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 13 of this year's entering students and finds that their mean IQ score is 119, with standard deviation of 11. The college records indicate that the mean IQ score for entering students from previous years is 112. If we assume that the IQ scores of this year's entering class are normally distributed, is there...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 16 of this year's entering students and finds that their mean IQ score is 116, with standard deviation of 10. The college records indicate that the mean IQ score for entering students from previous years is 113. If we assume that the 10 scores of this year's entering dass are normally distributed, is there...
Question 16 6 pts A researcher is studying the possible effect that a certain medication administered to children has on brain development. She decides to measure the effect by analyzing IQ scores of individuals who took the medication as children. She is working under the assumption that IQ scores in this population are normally distributed with a standard deviation of 15, just as in the general population. The researcher collects a sample of 40 individuals who took the medication as...
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 22 of this year's entering students and finds that their mean 1Q score is 119, with standard deviation of 15. The college records indicate that the mean 1Q score for entering students from previous years is 112. If we assume that the 1Q scores of this year's entering class are normally distributed, is there...
(6 pts) A psychologist who needs two groups of
students for a learning experiment decides to select a random
sample of female college
students and male college students. Before the experiment, the
psychologist administers an IQ test to both groups to determine if
there is a significant difference in their mean IQ scores. The
population standard deviation for this IQ test is know to be
for both female and male populations. If the sample
mean IQ score of the female...
Most questions answered within 3 hours.
-
Other decisions about scientific claims can have a much broader
impact.ENERGYarrow-10x10.png, environment, health, security - all...
asked 9 minutes ago -
I need to write a research paper and work cited about this
topic: The United States...
asked 31 minutes ago -
Hello! I was wondering if I could have some help?
If the vapor pressure of carvone...
asked 53 minutes ago -
An economist wants to estimate the mean per capita income (in
thousands of dollars) for a...
asked 1 hour ago -
What would be the input/output characteristic of a circuit
obtained by putting two of your 2's-complementers...
asked 1 hour ago -
In Drosophila, the transition from the syncytial blastoderm
stage to the cellular blastoderm stage is a...
asked 1 hour ago -
Project management question:
Name 3 different types of resources (hint: humans are one
type)
asked 1 hour ago -
Consider the following reaction: C 2H 2( g) + 2H 2( g) C 2H 6(
g)...
asked 2 hours ago -
Consider a 1.0 L buffer containing 0.092 mol L-1 HCOOH and 0.100
mol L-1 HCOO-. What...
asked 2 hours ago -
Koch Realty has owned a vacant land with a FMV of
$775,000 and an adjusted basis...
asked 2 hours ago -
It is estimated 29% of all adults in United States invest in
stocks and that 85%...
asked 2 hours ago -
What does a 2-sided p value of 0.04 mean? (I am not asking if it
is...
asked 2 hours ago