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Hypothesis Testing
Page 2
Questions (2,044)
we just want to test if couples as a whole have some preferred direction of turning their head; that is, we want to decide
4 answers
asked anonymously
108 views
You wish to test the following claim (Ha) at a significance level of α=0.001. Ho:μ=69.1
Ha:μ<69.1 You believe the population
2 answers
asked by
Lisa
1,068 views
A local McDonald's manager will return a shipment of hamburger buns if more than 10% of the buns are crushed. A random sample of
2 answers
asked by
Meep
985 views
Determine the p–value associated with the values of the standardized test statistic z = 1.05 for one-tail
test. (1) 0.3531 (2)
2 answers
asked by
SAM
1,033 views
The manufacturer of the X-15 steel-belted radial truch tire claims that the mean mileage the tire can be driven before the tread
2 answers
asked by
Samir
597 views
which test to use One-sample or independent samples t-test?
A researcher tests five individuals who have seen paid political ads
4 answers
asked by
kelly
1,119 views
In a simple random sample of 1000 people taken from City A, 13% are senior citizens. In an independent simple random sample of
14 answers
asked by
Helen
713 views
A company with a large fleet of cars hopes to keep gasoline costs down and sets a goal of attaining a fleet average of at least
4 answers
asked by
GLEN
2,980 views
You are testing the claim that the mean GPA of night students is less than the mean GPA of day students.
You sample 45 night
4 answers
asked by
hannah
2,540 views
Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of
2 answers
asked by
Anonymous
554 views
Calculate paired sample t test with an equal variance . between clock wise and counter-clock wise direction.(choose some of the
2 answers
asked anonymously
63 views
Calculate paired sample t test with an equal variance .show if there is any significance difference between clock wise and
2 answers
asked anonymously
60 views
The owner of a football team claims that the average attendance at home games is over 3000, and he is therefore justified in
3 answers
asked by
breeamberr
1,629 views
Let Θ1 and Θ2 be some unobserved Bernoulli random variables and let X be an observation. Conditional on X=x, the posterior
3 answers
asked by
akg
1,237 views
In conducting a hypothesis test for the difference in two population means where the standard
deviations are known and the null
2 answers
asked by
Lea
503 views
Column1 Column2 Column3 Column4 Column5 Column6
Year Winner Length Seconds Speed Direction 1867 Ruthless 1.625 185 31.621622
4 answers
asked anonymously
86 views
calculate paired sample T test using the following information (you can choice any column to compare on your calculation).
Column
2 answers
asked anonymously
186 views
calculate paired sample T test using the following data.
1973 Secretariat 1.5 144 37.5 counter-clockwise 1974 Little Current 1.5
4 answers
asked anonymously
94 views
How do you know that this is one tail or two tailed test
2 answers
asked anonymously
66 views
Let X_1, \ldots , X_ n \stackrel{iid}{\sim } \mathsf{Ber}(p). We want to test
\begin{array}{rl} H_0: & p\le .5 \\ H_1: & p> .5\\
2 answers
asked anonymously
111 views
Let X_1, \ldots , X_ n \stackrel{iid}{\sim } \mathsf{Ber}(p). We want to test
\begin{array}{rl} H_0: & p=.5 \\ H_1: & p\neq .5\\
2 answers
asked anonymously
126 views
Which of the following are true statements regarding p-values? (Choose all that apply.)
The p-value represents a tipping point in
4 answers
asked anonymously
124 views
Consider a hypothesis test with null H_0 and alternative H_1 regarding an unknown parameter \theta. You observe a sample X_1,
2 answers
asked anonymously
117 views
consider the following haypothesis
Ho: =20 Ha: =20
7 answers
asked anonymously
58 views
A sample of 125 is drawn from population with proportion equal to 0.065.determine the probability of observing :
A, 80 or fewer
2 answers
asked by
Alazer Hagota
126 views
Given:
Sample size (n) = 65 Sample mean (x-bar) = 96.5 Sample standard deviation (s) = 11.0 Test statistic = -2.565 What is the
2 answers
asked by
Stat
97 views
A sample of 125 is drown population with proportion equal to.065. determine the probability of observing
A 80 or fewer successes
2 answers
asked by
Birhanu
81 views
calculate independent sample t test for an equal variance with the following data set.
CLOCKWISE(X) 185 182 184.3 176 179.5 178.2
6 answers
asked anonymously
147 views
calculate independent sample t test for an equal variance with the following data set.
CLOCKWISE(X) 185 182 184.3 176 179.5 178.2
2 answers
asked anonymously
105 views
Using the data below and a 0.05 significance level, test the claim that the responses occur with percentages of 15%, 20%, 25%,
10 answers
asked by
Billy Bobby
107 views
A new drug was designed to help patients continue their abstinence from the use of alcohol. Adverse reactions to the drug have
7 answers
asked by
Billy Bobby
109 views
In a recent news article about an experimental vaccine for children, the following statement was presented: "In a trial
7 answers
asked by
Bobby billy
128 views
Eight golfers took part in an experiment in which they hit two different brands of golf balls. The table shows the distance
7 answers
asked by
duuuuuuude
97 views
Eight golfers took part in an experiment in which they hit two different brands of golf balls. The table shows the distance
2 answers
asked by
duuuuuuude
100 views
A sample of 6 head widths of seals (in cm) and the corresponding weights of the seals (in kg) were recorded. Given a linear
2 answers
asked by
Bobby billy
92 views
We use the statistical set-up from a previous problem. Recall that X_1, \ldots , X_ n are i.i.d. samples with cdf F, and F^0
2 answers
asked anonymously
77 views
Let X_1, \ldots , X_ n be iid samples with cdf F, and let F^0 denote the cdf of \textsf{Unif}(0,1). Recall that
F^0(t) = t \cdot
2 answers
asked anonymously
96 views
Let \Theta be a Bernoulli random variable that indicates which one of two hypotheses is true, and let \mathbf{P}(\Theta =1)=p.
2 answers
asked anonymously
107 views
Number of Jurors by race:
White - 205 (0.72 proportion in country) Black - 26 (0.07 proportion in country) Hispanic - 25 (0.12
2 answers
asked anonymously
113 views
Let X_1, \ldots , X_ n \stackrel{iid}{\sim }X\sim \mathbf{P} for some unknown distribution \mathbf{P} with continuous cdf F.
2 answers
asked anonymously
124 views
The problems on this page concern the data set
S = \{ 0.28, 0.2, 0.01, 0.80, 0.1 \} . Let x_ i denote the i'th element of the
2 answers
asked anonymously
114 views
Consider the same statistical set-up as above. Suppose we observe a data set consisting of 1000 observations as described in the
2 answers
asked anonymously
110 views
Aliens from Planets X, Y, and Z gather on a remote planet every year to decide intergalactic policy. The organizing committee
2 answers
asked anonymously
75 views
We use the same statistical set-up as above. Recall that you use a test of the form
\psi _ n = \mathbf{1}\left( T_ n > C \right),
2 answers
asked anonymously
103 views
We use the same statistical set-up as above. In particular, our test-statistic is
T_ n = n \sum _{j = 1}^6 \frac{(\widehat{p }_ j
2 answers
asked anonymously
90 views
You and your friend play dice games for fun, but one day you suspect that the die your friend uses is not fair. You will gather
2 answers
asked anonymously
117 views
Let \widehat{\mathbf{p}} denote the MLE for a categorical statistical model ( \{ a_1, \ldots , a_ K \} , \{
2 answers
asked anonymously
108 views
Let X be a uniform random variable with the distribution \text {Unif}\left[0,\theta ^*\right].
We would like to test whether H_0:
2 answers
asked anonymously
117 views
To evaluate the quality of their product, a manufacturer of cell phones checks every 50th phone off the assembly line. Out of
2 answers
asked anonymously
93 views
Pennsylvania Refining Company is studying the relationship between the pump price of gasoline and the number of gallons sold.
1 answer
asked by
Janice
670 views
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