The time that people require to react to a stimulus usually has a right-skewed distribution, as...
The time that people require to react to a stimulus usually has a right-skewed distribution, as lack of attention or tiredness causes some lengthy reaction times. Reaction times for children with attention deficit hyperactivity disorder (ADHD) are more skewed, as their condition causes more frequent lack of attention. In one study, children with ADHD were asked to press the spacebar on a computer keyboard when any letter other than X appeared on the screen. With 2 seconds between letters, the mean reaction time was 446 milliseconds (ms) and the standard deviation was 81 ms. Take these values to be the population μ and σ for ADHD children. (Round your standard deviations to two decimal places.)
a.) What are the mean and standard deviation of the mean reaction time x for a randomly chosen group of 15 ADHD children?
mean: ___ms
standard deviation: ____ ms
b) What are the mean and standard deviation of the mean reaction time x for a randomly chosen group of 150 ADHD children?
mean: _____ ms
standard deviation: ____ ms
Homework Answers
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The time that people require to react to a stimulus usually has
a right-skewed distribution, as...
Reaction time studies are studies in which participants receive a stimulus and the amount of time...
Reaction time studies are studies in which participants receive a stimulus and the amount of time it takes for them to react is measured. In one simple type of reaction time study, each participant holds a clicker button and stares at a screen. When the participant sees a part of the screen light up, he or she clicks the button as quickly as possible. The researcher then records how much time elapsed between when the screen lit up and when...
Reaction time studies are studies in which participants receive a stimulus and the amount of time...
Reaction time studies are studies in which participants receive a stimulus and the amount of time it takes for them to react is measured. In one simple type of reaction time study, each participant holds a clicker button and stares at a screen. When the participant sees a part of the screen light up, he or she clicks the button as quickly as possible. The researcher then records how much time elapsed between when the screen lit up and when...
Suppose the time between buses at a particular stop is a positively skewed random variable with...
Suppose the time between buses at a particular stop is a positively skewed random variable with an average of 59 minutes and standard deviation of 6 minutes. Suppose the time between buses at this stop is measured for a randomly selected week, resulting in a random sample of n = 38 times. The average of this sample, X , is a random variable that comes from a specific probability distribution. (a)Which of the following is true about the distribution of...
Will rate! Guppose the time between buses at a particular stop is a positively skewed random...
Will rate!
Guppose the time between buses at a particular stop is a positively skewed random varlable with an average of 50 minutes and standard deviation of 5 minutes. Suppose the time between buses at this stop is measured for a randomly selected week, resulting in a random sample of t= 35 t mes. The average of this tampi x, is a randon an able that comes from a specific probability distribution. (ajwhich of the following is true about the...
A substance abuse researcher wants to know whether reaction time is increased by frequent alcohol use....
A substance abuse researcher wants to know whether reaction time is increased by frequent alcohol use. He randomly selects 52 alcoholics and finds that their mean reaction time (in ms) equals 401.4. Reaction times to the stimulus in the general population are distributed normally with a mean equal to 395 and a standard deviation equal to 80 . Is there sufficient evidence to conclude that reaction times of alcoholics are higher than those of the general population? Use a significance...
Question 12 Commute times in the U.S. are heavily skewed to the right. We select a...
Question 12 Commute times in the U.S. are heavily skewed to the right. We select a Type numbers in the boxes. random sample of 200 people from the 2000 U.S. Census who reported a non- 10 points zero commute time. In this sample the mean commute time is 27.5 minutes with a standard deviation of 18.9 minutes. Can we conclude from this data that the mean commute time in the U.S. is less than half an hour? Conduct a hypothesis...
A nationwide study on reaction time is conducted on participants in two age groups. The participants...
A nationwide study on reaction time is conducted on participants in two age groups. The participants in Group X are less than 40 years old. Their reaction times are normally distributed with mean 0.489 seconds and standard deviation of 0.07 seconds. a. A person is selected at random from Group X. Find the probability that their reaction time is greater than 0.65 seconds. The participants in Group Y are 40 years or older. Their reaction times are normally distributed b....
A nationwide study on reaction time is conducted on participants in two age groups. The participants in Group X are less than 40 years old. Their reaction times are normally distributed with mean 0.48...
A nationwide study on reaction time is conducted on participants in two age groups. The participants in Group X are less than 40 years old. Their reaction times are normally distributed with mean 0.489 seconds and standard deviation of 0.07 seconds.a. A person is selected at random from Group X. Find the probability that their reaction time is greater than 0.65 seconds. The participants in Group Y are 40 years or older. Their reaction times are normally distributedb. The participants...
can you please do 30, 31, 37, 39b and show work? 30) A machine has a...
can you please do 30, 31, 37, 39b and show work?
30) A machine has a probability 0.03 of producing a defective glf b When 3 golf balls are manufactured by this machine, find the probability that none of the golf balls is defective 31) When three people are selected randomly, find the probability that their birthdays are all different 32) The mean credit card debt for college students in the U.S. is $2100. Is 2100 a parameter or statistic?...
Evaluate the arical writ the response in which you state your agreement or disagreement with writer...
Evaluate the arical
writ the response in which you state your agreement or disagreement
with writer up un these questions guidelines
1) can empathy lead us astrary? how
2) our heart will always go out to the baby in the well, its a
measure of our humanity. but empathy will have to yield to reason
if humanity is to have a future can empathy yield to reason?
how?
thank you
The Baby in the Well: The Case against Empathy* -Paul...
Reaction time studies are studies in which participants receive a stimulus and the amount of time it takes for them to react is measured. In one simple type of reaction time study, each participant holds a clicker button and stares at a screen. When the participant sees a part of the screen light up, he or she clicks the button as quickly as possible. The researcher then records how much time elapsed between when the screen lit up and when...
Suppose the time between buses at a particular stop is a positively skewed random variable with an average of 59 minutes and standard deviation of 6 minutes. Suppose the time between buses at this stop is measured for a randomly selected week, resulting in a random sample of n = 38 times. The average of this sample, X , is a random variable that comes from a specific probability distribution. (a)Which of the following is true about the distribution of...
Will rate!
Guppose the time between buses at a particular stop is a positively skewed random varlable with an average of 50 minutes and standard deviation of 5 minutes. Suppose the time between buses at this stop is measured for a randomly selected week, resulting in a random sample of t= 35 t mes. The average of this tampi x, is a randon an able that comes from a specific probability distribution. (ajwhich of the following is true about the...
Question 12 Commute times in the U.S. are heavily skewed to the right. We select a Type numbers in the boxes. random sample of 200 people from the 2000 U.S. Census who reported a non- 10 points zero commute time. In this sample the mean commute time is 27.5 minutes with a standard deviation of 18.9 minutes. Can we conclude from this data that the mean commute time in the U.S. is less than half an hour? Conduct a hypothesis...
can you please do 30, 31, 37, 39b and show work?
30) A machine has a probability 0.03 of producing a defective glf b When 3 golf balls are manufactured by this machine, find the probability that none of the golf balls is defective 31) When three people are selected randomly, find the probability that their birthdays are all different 32) The mean credit card debt for college students in the U.S. is $2100. Is 2100 a parameter or statistic?...
Evaluate the arical
writ the response in which you state your agreement or disagreement
with writer up un these questions guidelines
1) can empathy lead us astrary? how
2) our heart will always go out to the baby in the well, its a
measure of our humanity. but empathy will have to yield to reason
if humanity is to have a future can empathy yield to reason?
how?
thank you
The Baby in the Well: The Case against Empathy* -Paul...
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