Stats Final Exam ACTUAL UPDATED Questions and CORRECT Answers
C
Terms in this set (50)
Anna Grace is conducting a survey of Texas A&M Qualitative.
students. She asks them their age, gender, current GPA,
major, current number of credit hours, high school GPAs,
and number of days of class they missed in the last
month. What kind of variable is major?
Taylor Swift wants to know the proportion of her fans The parameter is the proportion of all Taylor Swift fans who listened to ME! within
who listened to her new single ME! within the first hour of the first hour after it was released, which is unknown.
it being released. In order to estimate this, she takes a
sample of 150 of her fans and asks them if they listened to
the song in this time period. Of the 150 fans, 135 of them
(90%) responded that they did listen to the song during
this time period. What is the parameter and what is its
value?
In which of the following study designs would you Census.
generally know the value of the parameter?
A researcher wants to determine if a new flu vaccine Experimental Study: Block Design
protects people from the flu better than the current
vaccine. He has 100 subjects for his study. He believes
that sex will affect how well the vaccine works, so within
these 100 subjects, splits them up into males (48 subjects)
and females (52 subjects). Within each sex, he randomly
assigns half of the subjects to get the new flu vaccine and
the other half to get the current flu vaccine. What type of
study design is this?
Consider the following set of data: 2, 3, 4. What is the 1.00
standard deviation?
, The boxplot below shows the distribution of heights of 16 12
undergraduate statistics students. Using this boxplot,
approximately how many students are 64 inches or
taller?
The average on a history exam (out of 100 points) was 85, Left Skewed.
with a standard deviation of 15. What shape would you
expect the distribution of grades to take?
Anna teaches a small class of 14 students. She recently 2
gave them an exam (out of 100 points). The scores on the
exam were: 0, 15, 58, 75, 78, 82, 84, 84, 89, 91, 94, 98, 100,
and 100. How many of the scores are potential outliers?
One common disease among pediatric patients is 0.878
streptococcal pharyngitis (strep throat). If a pediatric
patient comes into the pediatricians feeling ill, there is a
26% chance that they have strep throat. A doctor sees 7
pediatric patients on a particular day (assume these
patients are independent). Consider the random variable
as a binomial random variable such that X = number of
pediatric patients with strep throat. What is the chance
that at least one of them has strep throat?
Heights of adult American women are normally None of the above.
distributed with a mean of 65 inches and a standard
deviation of 3.5 inches. Taylor is a 28 year old American
woman. Her doctor tells her that her height is below
average but less than one standard deviation away from
the mean. Which of the following could potentially be the
z-score of her height?
A health study reported that, in one country, systolic 0.1151
blood pressure readings have a mean of 122 and a
standard deviation of 15. A reading above 140 is
considered to be high blood pressure. If the systolic
blood pressure in that country has a normal distribution,
using the z-table, what proportion of the population
suffers from high blood pressure?
An index that is a standardized measure used in 100.40
observing infants over time is approximately normal with
a mean of 96 and a standard deviation of 10. What index
score is less than 33% of the population index scores?
Sarah wants to determine the average height of all Sarah and her 20 classmates each survey 40 students at Wittenberg University and
students at Wittenberg University. In which of the ask them their height. Each person calculates the average of their sample and
following scenarios would Sarah be looking at the Sarah looks at all these averages.
sampling distribution?
C
Terms in this set (50)
Anna Grace is conducting a survey of Texas A&M Qualitative.
students. She asks them their age, gender, current GPA,
major, current number of credit hours, high school GPAs,
and number of days of class they missed in the last
month. What kind of variable is major?
Taylor Swift wants to know the proportion of her fans The parameter is the proportion of all Taylor Swift fans who listened to ME! within
who listened to her new single ME! within the first hour of the first hour after it was released, which is unknown.
it being released. In order to estimate this, she takes a
sample of 150 of her fans and asks them if they listened to
the song in this time period. Of the 150 fans, 135 of them
(90%) responded that they did listen to the song during
this time period. What is the parameter and what is its
value?
In which of the following study designs would you Census.
generally know the value of the parameter?
A researcher wants to determine if a new flu vaccine Experimental Study: Block Design
protects people from the flu better than the current
vaccine. He has 100 subjects for his study. He believes
that sex will affect how well the vaccine works, so within
these 100 subjects, splits them up into males (48 subjects)
and females (52 subjects). Within each sex, he randomly
assigns half of the subjects to get the new flu vaccine and
the other half to get the current flu vaccine. What type of
study design is this?
Consider the following set of data: 2, 3, 4. What is the 1.00
standard deviation?
, The boxplot below shows the distribution of heights of 16 12
undergraduate statistics students. Using this boxplot,
approximately how many students are 64 inches or
taller?
The average on a history exam (out of 100 points) was 85, Left Skewed.
with a standard deviation of 15. What shape would you
expect the distribution of grades to take?
Anna teaches a small class of 14 students. She recently 2
gave them an exam (out of 100 points). The scores on the
exam were: 0, 15, 58, 75, 78, 82, 84, 84, 89, 91, 94, 98, 100,
and 100. How many of the scores are potential outliers?
One common disease among pediatric patients is 0.878
streptococcal pharyngitis (strep throat). If a pediatric
patient comes into the pediatricians feeling ill, there is a
26% chance that they have strep throat. A doctor sees 7
pediatric patients on a particular day (assume these
patients are independent). Consider the random variable
as a binomial random variable such that X = number of
pediatric patients with strep throat. What is the chance
that at least one of them has strep throat?
Heights of adult American women are normally None of the above.
distributed with a mean of 65 inches and a standard
deviation of 3.5 inches. Taylor is a 28 year old American
woman. Her doctor tells her that her height is below
average but less than one standard deviation away from
the mean. Which of the following could potentially be the
z-score of her height?
A health study reported that, in one country, systolic 0.1151
blood pressure readings have a mean of 122 and a
standard deviation of 15. A reading above 140 is
considered to be high blood pressure. If the systolic
blood pressure in that country has a normal distribution,
using the z-table, what proportion of the population
suffers from high blood pressure?
An index that is a standardized measure used in 100.40
observing infants over time is approximately normal with
a mean of 96 and a standard deviation of 10. What index
score is less than 33% of the population index scores?
Sarah wants to determine the average height of all Sarah and her 20 classmates each survey 40 students at Wittenberg University and
students at Wittenberg University. In which of the ask them their height. Each person calculates the average of their sample and
following scenarios would Sarah be looking at the Sarah looks at all these averages.
sampling distribution?
