Recent questions in Statistics and Probability

Sampling distributions
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emancipezN
2020-10-21

Identify which assumption is the least critical.

Summarizing quantitative data
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nitraiddQ
2020-10-21

Comparing two groups
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mattgondek4
2020-10-21

Paired two-sample t-test

Sampling distributions
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shadsiei
2020-10-21

a sitting for men, 4 for women), a professor surveyed a random sample of 244 students at his college and found that 96 of them admitted to binge drinking in the past week. Should he be surprised at this result? Explain.

Scatterplots
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mattgondek4
2020-10-21

Random variables
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Tabansi
2020-10-21

What is the standard deviation of a continuous random variable X?

Comparing two groups
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Rivka Thorpe
2020-10-21

Modeling data distributions
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boitshupoO
2020-10-21

Find the length and width of the pond.

Describing quantitative data
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Khaleesi Herbert
2020-10-20

Do the following summarize a categorical variable or a numerical variable? Explain.

(1) For a football player, the average number of yards per carry in one game

(2) For a basketball player, the shooting percentage during one game

(3) For a baseball player, his batting average during the playoffs

(4) For a hockey player, the time on ice per game

Sampling distributions
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opatovaL
2020-10-20

Analyzing categorical data
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Carol Gates
2020-10-20

Analyzing categorical data
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UkusakazaL
2020-10-20

The table shows the total cost c of buying t movie tickets. Write an equation to represent the relationship between c and t.

Comparing two groups
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Line
2020-10-20

Type 1: 20

Type 2: 30

Type 3: 28

Type 4: 22

Which pairs are significantly different at the

Random variables
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waigaK
2020-10-20

A population of values has a normal distribution with

Find the probability that a single randomly selected value is between 17.1 and 25.

Write your answers as numbers accurate to 4 decimal places.

Chi-square tests
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slaggingV
2020-10-20

B) What might you do instead of weighing the nuts in order to use a x2 test?

Nuts A company says its premium mixture of nuts con- tains 10% Brazil nuts, 20% cashews, 20% almonds, and 10% hazelnuts, and the rest are peanuts. You buy a large can and separate the various kinds of nuts. Upon weigh- ing them, you find there are 112 grams of Brazil nuts, 183 grams of cashews, 207 grams of almonds, 71 grams of hazelnuts, and 446 grams of peanuts. You wonder whether your mix is significantly different from what the company advertises.

Comparing two groups
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permaneceerc
2020-10-20

When drawing conclusions about the variance of a single population, what probability distribution is used?

When comparing the variance of two populations,

The assumption of is known to affect the F test's sensitivity when comparing two population variances. ?

Summarizing quantitative data
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Suman Cole
2020-10-20

The 5-number summary for the run times in minutes of the 150 highest grossing movies of 2010 is provided.

Two-way tables
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Tammy Todd
2020-10-19

Researchers carried out a survey of fourth-, fifth-, and sixth-grade students in Michigan. Students were asked whether good grades, athletic ability, or being popular was most important to them. This two-way table summarizes the survey data.

Suppose we select one of these students at random. What's the probability that: The student is a sixth grader or a student who rated good grades as important?

Study design
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FizeauV
2020-10-19

Does the data indicate that the higher level of illumination yields a decrease of more than 5 sec in true average task completion time? Test the appropriate hypotheses using the P-value approach.

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