Recent questions in Statistics and Probability

Comparing two groups
Answered

permaneceerc
2020-10-20

The probability distribution used when comparing two population variance is ?

The F test for comparing two population variances is known to be sensitive to the assumption of ?

Describing quantitative data
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Khaleesi Herbert
2020-10-20

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

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

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

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
Answered

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.

Two-way tables
Answered

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.

Chi-square tests
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ringearV
2020-10-19

Random variables
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CheemnCatelvew
2020-10-18

Find the probability that a single randomly selected value is greater than 235.9.

Write your answers as numbers accurate to 4 decimal places.

Confidence intervals
Answered

waigaK
2020-10-18

Comparing two groups
Answered

Yasmin
2020-10-18

Comparing two groups
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beljuA
2020-10-18

Upper level probability
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zi2lalZ
2020-10-18

Analyzing categorical data
Answered

illusiia
2020-10-18

Confidence intervals
Answered

ossidianaZ
2020-10-18

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