8,971 Answered Questions for the topic statistics

Statistics

02/26/22

Statistics Probability function
A test consists of 5 questions. there are 4 answers for each question of which only one is correct. Assume that a student randomly guesses each question. determine the probability function for X,... more
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Statistics

02/25/22

If you draw a card with a value of four or less from a standard deck of cards, I will pay you $5 . If not, you pay me $5 $ (Aces are considered the highest card in the deck.)
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02/25/22

Mar, cashier of ABC Department store is given a 15%
Mar, cashier of ABC Department store is given a 15% discount on a cash purchase. How much will her discount be if she buys 2 dresses at P180 each and one pair of shoes costing P650?a. P150.50 b.... more
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Statistics Ap Statistics

02/24/22

True or false. To have a binomial setting, the following must be true: When sampling, the population must be at least 20 times as large as the sample size. (Some textbooks say 10 times as large.)
I originally believed the answer was false. I thought sampling could be done with replacement. So, the condition, which is only necessary for when the trails are not independent, is not a must to... more
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Statistics Science Psychology

02/24/22

Psychology experiment
Explain why “a correlation does not prove causation.”  Design an experiment that will examine the question, “Who will learn more about psychology, those students attend face- to-face lecture or... more
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Statistics Math

02/24/22

Need help solving
The heights of adult men in America are normally distributed, with a mean of 69.4 inches and a standard deviation of 2.65 inches. The heights of adult women in America are also normally... more
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Statistics

02/23/22

Computing a Margin of Error: Confidence Interval for a Population Mean
You measure 34 watermelons' weights, and find they have a mean weight of 74 ounces. Assume the population standard deviation is 11.1 ounces.Based on this, what is the margin of error associated... more
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Statistics Math Statics

02/23/22

In one large city, 37% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that at most one voter selected is a Democrat.
Use the appropriate multiplication rule to find the indicated probability.In one large city, 37% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability... more
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Statistics Probability

02/23/22

In a large school, it was found that 64% of students are taking a math class, 78% of student are taking an English class, and 56% of students are taking both.
A: Find the probability that a randomly selected student is taking a math class or an English class. Write your answer as a decimal, and round to 2 decimal places if necessary.B: Find the... more
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Statistics

02/23/22

A baseball player has a batting average of 0.375. What is the probability that he has exactly 3 hits in his next 7 at bats?

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Statistics

02/23/22

calculate the slope in Y intercept of the line using summary statistics for each of the variable based on data below
Time: 14, 25, 15, 5, 10, 12, 5, 21GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics

02/23/22

what is the residual for 12 hours of study per week what does this indicate about the regression line at that point? Use data below
Time 14, 25, 15, 5, 10, 12, 5, 21GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics

02/23/22

what is the predicted GPA value for 12 hours of study per week based on the data below?
Time:14, 25, 15, 5, 10, 12, 5, 21GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics

02/23/22

Based on this data what is the R Square
14, 25, 15, 5, 10, 12, 5, 21GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics

02/23/22

Based on data what is the slope and interpret the meaning in context of this problem

Time:14, 25, 15, 5, 10, 12, 5, 21 GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics

02/23/22

What are the least squares regression line for this data 14, 25, 15, 5, 10, 12, 5, 21 GPA: 3.1, 3.7, 3.4, 3.0, 3.1, 3.3, 2.7, 3.8
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Statistics Probability

02/22/22

How should I approach this question?
At a particular university, students' grades in introductory statistic classes are generally unimodal and skewed to the left with a mean of u = 63 and a standard deviation of o = 18.0. (Round to 2... more
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Statistics Probability

02/22/22

I don’t understand how to solve this?
The distribution of actual weights of wedges of cheddar cheese produced at a dairy is normal with a mean of 9.1 ounces and a standard deviation of 0.2 ounces. (Round to 2 decimal places for all... more
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Statistics Probability

02/22/22

I need help with this.

In a large population of adults, the mean IQ is 123 with a standard deviation of 17. Suppose 60 adults are randomly selected for a market research campaign. (Round to 2 decimal places for all... more
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Statistics

02/21/22

Andy is a restaurant owner…
Andy is a restaurant owner: He believes 85% of his customers are satisfied with the food quality of his restaurant: From a random sample of 96 customers, what are the following probabilities?... more
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Statistics

02/21/22

Need help in knowing how to start this one: A researcher…
A researcher would like to estimate the proportion of home-based businesses owned by women. What is the minimum sample size needed to be 99% confident with a 3.9% margin of error? (Round your... more
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Statistics Math

02/21/22

A 90% confidence intervals…
A 90% confidence intervals for the proportion of first-year statistics students with brown hair is given to be (0.25, 0.41).(d) What is the standard error of the estimate? (Round to 3 decimal... more
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Statistics Math

02/21/22

A computer manufacturing company claims…
A computer manufacturing company claims that only 7.3% of their computers are returned. Kelly thinks that the company is misrepresenting the true proportion of computers that are returned, and that... more
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Statistics Ap Statistics

02/21/22

Fifty patients suffering from knee pain have volunteered to par- ticipate in an experiment to examine the effects of pain relief medication.
Fifty patients suffering from knee pain have volunteered to participate in an experiment to examine the effects of pain relief medication. Half will be assigned to take 400 mg of the pain reliever... more
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Statistics Ap Statistics

02/21/22

A diligent statistics student recorded the length of his faithful #2 pencil as he worked away on his homework.
A diligent statistics student recorded the length of hisfaithful #2 pencil as he worked away on his homework.He discovered a strong linear relationship between thenumber of hours that he worked and... more
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