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Statistics

11/05/22

Statistics help

Suppose a jar contains 9 red marbles and 14 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.

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Statistics

11/05/22

how to solve this problem

HOW TO SOLVE THIS PROBLEM!Consider a binomial experiment with n = 4 trials where the probability of success on a single trial is p = 0.45. (Round your answers to three decimal places.)(a)... more

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Statistics

11/05/22

STAT homework help

In a survey, 13 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $40 and standard deviation of $17. Construct a... more

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Statistics

11/05/22

In a survey, 28 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $38 and standard deviation of $4. Find the margin of... more

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Statistics

11/05/22

For a standard normal distribution, find: P(z > c) = 0.5586 Find c.

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Statistics Biostatistics

11/04/22

What are the sample mean and margin of error?

50 random flights from D.C to New York City were selected and the resulting 95% confidence interval was (82.5, 88.7). What are the sample mean and margin of error?

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Statistics Biostatistics

11/04/22

How to find and calculate the info below

It is believed that the mean flight time from Seattle to New York City is 310 minutes. You want to test to determine if it is different from this. The population standard deviation is 10... more

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Statistics Math

11/04/22

Confidence Interval

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 86.5 73 84.1 77.7 84.9 79.3 87.4 84.4 67.5 86.1 69 Find the 95% confidence interval. Enter... more

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Statistics

11/03/22

How can I combine 12 events with 3 possible outcomes each(pass fail or average) in every possible arrangement

Am I using combination or permutation??

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Statistics

11/03/22

Hi I need help with this stat question

Improving SAT scores. Refer to the Chance (Winter 2001) study of students who paid a private tutor (or coach) to help them improve their Standardized Assessment Test (SAT) scores, Exercise 4.50 (p.... more

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Statistics

11/02/22

Statistics Question

How many ways are there to select 4 candidates from 9 equally qualified recent graduates for openings in an accounting firm?

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Statistics

11/02/22

How did you calculate 98% confident as 2.326?

The original question is: How large of a sample size is required?The question reads as follows:You want to obtain a sample to estimate a population proportion. Based on previous evidence, you... more

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Statistics

11/02/22

Statistics Question

How many ways can a committee of 2 faculty members and 3 students be selected from 7 faculty members and 8 students? Show your work.

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Statistics

11/02/22

Which scenario is best to achieve objective?

Objective: To witness lightning striking a 1 meter area of the ocean with the least amount of wait time.Scenario 1, a 1 in 10k chance with lightning occurring once every quarter.Scenario 2, a 1 in... more

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Statistics Math

10/31/22

Use 6-point bins (94-99, 88-93, etc.) to make a frequency table for the set of exam scores shown below. Include columns for relative frequency and cumulative frequency.

9667897876808578788798787791827186787799

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Statistics

10/31/22

Conditional Probability

It is known that the event A and B are Mutually exclusive and that P(A)= 0.56 and P(B)=0.11 find P(A and B)?

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Statistics

10/31/22

Sample Proportion Question

According to a 2009 Reader's Digest article, people throw away about 7% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 100 grocery... more

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Statistics

10/31/22

Introduction to Stats

If n=16, ¯x (x-bar)=37, and s=15, construct a confidence interval at a 98% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal... more

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Statistics

10/30/22

Statistics question

Adult male height is normally distributed with a mean of 69 inches and a standard deviation of 2.29 inches. If an adult male is randomly selected, what is the probability that the adult male has a... more

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Statistics

10/27/22

What is the probability that a randomly selected day from 2013 will have a Group Trades total within 57,000 of the mean?

the mean is 3421439 and the standard deviation is 508638.08

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Statistics

10/27/22

If you choose 100 vehicles at random, what is the probability that 61 or more carry just one person?

Although cities encourage carpooling to reduce traffic congestion, many vehicles carry only one person. For example, 70% of vehicles on the roads in the Minneapolis-St. Paul metropolitan area are... more

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Statistics

10/27/22

The district uses a standardized reading test to assess a student’s reading level and that scores on this test are normally distributed with a mean of 250 and a standard deviation of 20.

A public school district has been given federal development funds to establish remedial reading classes for the students in grades 1 through 3. The district uses a standardized reading test to... more

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Statistics

10/27/22

In description box

Suppose that the heights of adult women in the United States are normally distributed with a mean of 63.5 inches and a standard deviation of 2.3 inches. Maria is taller than 90% of the population... more

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Statistics

10/27/22

For a standard normal distribution, find c if P(z > c) = 0.3732

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Statistics Math Calculus

10/26/22

Statistic Question (Homework Help)

Subject 1 2 3 4 5 6 7 8 9 Normal, Xi 4.49 4.34 4.58 4.65 4.31 4.83 4.59 5.00 4.79 Impaired, Yi 5.77 5.67 5.45 5.29 5.90 5.49 5.23 5.61 5.63 To illustrate the effects of driving under... more

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Statistics help

how to solve this problem

STAT homework help

STAT homework help

For a standard normal distribution, find: P(z > c) = 0.5586 Find c.

What are the sample mean and margin of error?

How to find and calculate the info below

Confidence Interval

How can I combine 12 events with 3 possible outcomes each(pass fail or average) in every possible arrangement

Hi I need help with this stat question

Statistics Question

How did you calculate 98% confident as 2.326?

Statistics Question

Which scenario is best to achieve objective?

Use 6​-point bins ​(94-99​, ​88-93, ​etc.) to make a frequency table for the set of exam scores shown below. Include columns for relative frequency and cumulative frequency.

Conditional Probability

Sample Proportion Question

Introduction to Stats

Statistics question

What is the probability that a randomly selected day from 2013 will have a Group Trades total within 57,000 of the mean?

If you choose 100 vehicles at random, what is the probability that 61 or more carry just one person?

The district uses a standardized reading test to assess a student’s reading level and that scores on this test are normally distributed with a mean of 250 and a standard deviation of 20.

In description box

For a standard normal distribution, find c if P(z > c) = 0.3732

Statistic Question (Homework Help)

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Use 6-point bins (94-99, 88-93, etc.) to make a frequency table for the set of exam scores shown below. Include columns for relative frequency and cumulative frequency.