There are more than 14,000 Penn State World Campus students. A survey was sent to
800 randomly selected World Campus students. The 800 students who were selected
to complete the survey were the _______ . All Penn State World Campus students are the
________.
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sample, population
In a sample of 7,000 newborn babies in France, 3,575 were female. A researcher wants
to know if there is evidence that more than half of all babies born in France are
female.
Minitab Express was used to conduct a randomization test with the following
hypotheses:
H 0 : p = 0.50
H a : p > 0.50
A p-value of 0.0400 was computed.
,Because the p-value is less than the standard alpha level of 0.05, the results are _______
and we should reject the null hypothesis.
However, because the researcher believes that the difference between the
hypothesized proportion of 0.50 and the observed sample proportion of 0.511 is very
small, the results are not ________.
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statistically significant, practically significant
Research question: Are more than 20% of all Americans lactose intolerant?
Does this research question requite a left-, right-, or two-tailed hypothesis test?
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right tailed
Simple linear regression methods were used to construct a model for predicting
vocabulary using age. According to this model, Anita's predicted vocabulary is 200
words. Anita's actual vocabulary is 260 words.
Compute the residual for Anita's vocabulary.
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60
Research question: Does drinking coffee in the afternoon cause headaches?
In this study, the explanatory variable is ________ and the response variable is _______ .
, Give this one a try later!
coffee consumption, headaches
IQR formula
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IQR = Q3 - Q1
A farmer wants to compare the milk production of dairy cattle fed different types of
feed: (1) Purina Mills, (2) Nutrena, and (3) Modesto. They have 300 cows and randomly
assign each cow to eat one of the three types of feed for a period of 3 months. At the
end of the 3 months, they record the milk production of each cow.
The cases are the_____
The explanatory variable is______
The response variable is______
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cows, type of feed, milk production
Research question: Is there a positive relationship between height and weight in the
population of all American high school students?
Select the appropriate hypotheses for testing this research question.
a. H0: r>0
Ha: r=0
b. H0: r=0
Ha: r>0
800 randomly selected World Campus students. The 800 students who were selected
to complete the survey were the _______ . All Penn State World Campus students are the
________.
Give this one a try later!
sample, population
In a sample of 7,000 newborn babies in France, 3,575 were female. A researcher wants
to know if there is evidence that more than half of all babies born in France are
female.
Minitab Express was used to conduct a randomization test with the following
hypotheses:
H 0 : p = 0.50
H a : p > 0.50
A p-value of 0.0400 was computed.
,Because the p-value is less than the standard alpha level of 0.05, the results are _______
and we should reject the null hypothesis.
However, because the researcher believes that the difference between the
hypothesized proportion of 0.50 and the observed sample proportion of 0.511 is very
small, the results are not ________.
Give this one a try later!
statistically significant, practically significant
Research question: Are more than 20% of all Americans lactose intolerant?
Does this research question requite a left-, right-, or two-tailed hypothesis test?
Give this one a try later!
right tailed
Simple linear regression methods were used to construct a model for predicting
vocabulary using age. According to this model, Anita's predicted vocabulary is 200
words. Anita's actual vocabulary is 260 words.
Compute the residual for Anita's vocabulary.
Give this one a try later!
60
Research question: Does drinking coffee in the afternoon cause headaches?
In this study, the explanatory variable is ________ and the response variable is _______ .
, Give this one a try later!
coffee consumption, headaches
IQR formula
Give this one a try later!
IQR = Q3 - Q1
A farmer wants to compare the milk production of dairy cattle fed different types of
feed: (1) Purina Mills, (2) Nutrena, and (3) Modesto. They have 300 cows and randomly
assign each cow to eat one of the three types of feed for a period of 3 months. At the
end of the 3 months, they record the milk production of each cow.
The cases are the_____
The explanatory variable is______
The response variable is______
Give this one a try later!
cows, type of feed, milk production
Research question: Is there a positive relationship between height and weight in the
population of all American high school students?
Select the appropriate hypotheses for testing this research question.
a. H0: r>0
Ha: r=0
b. H0: r=0
Ha: r>0
