Question
In: Statistics and Probability
We want to know whether or not there is a difference in the proportion of A’s...
We want to know whether or not there is a difference in the proportion of A’s in math class received by students who participated in a tutoring program and those who did not participate. There are 40 kids who did the tutoring program and 14 of them got A’s. There are 52 who did not do the tutoring program and 12 of them also got A’s. Apply 2-sided test at 4% SL.
What more is needed? This is what we have as a question, nothing more.
Solutions
orchestra answered 1 year agoRelated Solutions
We want to know whether the proportion of U.S. children living in families with combined incomes...
We want to know whether the proportion of U.S. children living
in families with
combined incomes below the poverty line has changed in the last 20
years. In 2000 the
proportion of children living below the poverty line was 12%. Out
of a recent random
sample of 90 children 9 were from families with combined incomes
below the poverty
line. Use this information to answer the following.
The alternative hypothesis for the above would be
A. ☐μ = 12%
B....
Suppose we wanted to know if there is a difference in the proportion of citizens from...
Suppose we wanted to know if there is a difference in the
proportion of citizens from different provinces who would support
the idea of federal laws for mask wearing in public. Upon
collecting some sample data we find that 34 out of 50 residents of
Ontario would support such legislation, while only 28 out of 50
residents of Alberta support the idea of such laws.
a.) Conduct the appropriate test of hypothesis for these data at
the .05 level
b.)...
Suppose we wanted to know if there is a difference in the proportion of citizens from...
Suppose we wanted to know if there is a difference in the
proportion of citizens from different provinces who would support
the idea of federal laws for mask wearing in public. Upon
collecting some sample data we find that 34 out of 50 residents of
Ontario would support such legislation, while only 28 out of 50
residents of Alberta support the idea of such laws.
a.) Conduct the appropriate test of hypothesis for these data at
the .05 level
b.)...
We want to assess whether there is a difference in the impact that the predatory larvae...
We want to assess whether there is a difference in the impact
that the predatory larvae of three damselfly species (Enallagma,
Lestes and Pyrrhosoma) have on the abundance of midge larvae in a
pond.
We plan to conduct an experiment in which small (1 m2m2) nylon
mesh cages are set up in the pond. All damselfly larvae will be
removed from the cages and each cage will then be stocked with 20
individuals of one of the species. After 3...
7. Let us assume that what we want is to know whether the wines of the...
7. Let us assume that what we want is to know whether the wines
of the designation of origin have the same alcoholic content, as
well as their variability in the same, as those of another
designation of origin, for example Baja California. It is a
question of whether there is a clear differentiation in these two
regions, because of the geographical proximity of the two regions,
it is possible that there will be fraud and that wines from both...
10.4 Comparing two means: Paired samples "We want to know if there is a difference between...
10.4 Comparing two means: Paired samples
"We want to know if there is a difference between the size of the
shoe between mother and daughter, for which a sample of 10 pairs of
mother and daughter is taken and a hypothesis test is
performed."
Mother
7
7
8
8
6
9
8
6
7
9
Daughter
7
6
8
6
9
8
8
7
8
7
1. State the hypotheses
2. what is the average value of the paired differences...
We want to know whether an independent variable (room temperature) affects scores on a dependent variable...
We want to know whether an independent variable (room
temperature) affects scores on a dependent variable (ratings of
anger). The levels of the IV are hot and cold and the DV is
measured on an anger scale (ranging from 0 no anger to 10 high
anger). A random sample of subjects has been taken from the
universe. Half of the subjects are randomly placed in the hot room
while the other half are placed in the cold room.
The samples...
A study was done to determine whether there is a clear difference in the proportion of...
A study was done to determine whether there is a clear
difference in the proportion of fruit flies living at least 14 days
after eating organic raisins and the proportion of fruit flies
living at least 14 days after eating non-organic raisins. In this
study, 320 of the 500 fruit files eating organic raisins were .till
alive on the 15th day and 300 of the 500 fruit flies eating
non-organic raisins. Use SE = 0.0307. Do all steps of a...
Suppose we want to test whether or not three means are equal. We want to perform...
Suppose we want to test whether or not three means are equal. We
want to perform this test with a 2% significance level.
If we perform an ANOVA test, what is the probability of
the test producing accurate results (avoiding a Type I
error)?
Suppose we, instead, run three separate hypothesis tests
(t-tests), each with 2% significance level.
Mean 1 = Mean 2
Mean 1 = Mean 3
Mean 2 = Mean 3
What is the probability that all three...
Suppose we want to test whether or not three means are equal. We want to perform...
Suppose we want to test whether or not three means are equal. We
want to perform this test with a 2% significance level.
If we perform an ANOVA test, what is the probability of
the test producing accurate results (avoiding a Type I
error)?
Suppose we, instead, run three separate hypothesis tests
(t-tests), each with 2% significance level.
Mean 1 = Mean 2
Mean 1 = Mean 3
Mean 2 = Mean 3
What is the probability that all three...
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