Newest statistics Questions | Wyzant Ask An Expert

Statistics

12/21/22

An electronic product takes an average of 3hours to move through an asset line. If the standard deviation is 0.6 hours , what’s the probability that an item will take between 3 and 4.8 hours to move

Follows • 1

Answers •1

Statistics

12/20/22

A researcher selects a sample using a list of possible subjects. She uses a random number to select the first subject, and then selects every tenth subject on the list. What is this an example of?

A systematic sampleA cluster sampleA stratified sampleA multistage sampleA simple random sample (SRS)

Follows • 1

Answers •1

Statistics

12/19/22

the probability mass function of a random variable X is given by pr(x)=cµ^2/x! x=1,2,3.where µ is some positive value .find the constant c. (1)p(x>2) .(2)pr(x=0)

Follows • 1

Answers •1

Statistics

12/18/22

The area that lies between z=-1.08 and z=- 1.53

Follows • 1

Answers •1

Statistics Biostatistics

12/17/22

When taking a certain drug 8.5% experience nausea as a side effect.

A scientist took a random sample of 1102 individuals who were taking the drug and recorded the sample proportion who experienced nausea as a side effect, ˆp. Assume the sampling distribution... more

Follows • 1

Answers •1

Statistics Biostatistics

12/17/22

A population of values has a normal distribution with μ = 135.4 and σ = 80.7. You intend to draw a random sample of size n = 12 .

-Find the probability that a single randomly selected value is less than 207.6. P(X < 207.6) =-Find the probability that a sample of size n=12n=12 is randomly selected with a mean less than... more

Follows • 1

Answers •1

Statistics

12/16/22

Ten pairs of data yield r = 0.92 and the regression equation y^=8x+3. Also, y¯=−3.2 What is the best predicted value of y for x=7 ?

Follows • 1

Answers •1

Statistics Math Probability

12/15/22

The mean percent of childhood asthma prevalence in 43 cities is 2.14%. A random sample of 31 of these cities is selected.

The mean percent of childhood asthma prevalence in 43 cities is 2.14%. A random sample of 31 of these cities is selected. What is the probability that the mean childhood asthma prevalence for the... more

Follows • 1

Answers •1

Statistics Sas

12/14/22

Graphing a linear relationship with a categorical variable

Should a bar graph or a box plot be used if the group variable or the y variable is categorical and the dependent variable or outcome is continuous?

Follows • 1

Answers •1

Statistics

12/14/22

You are expected to do write a report on a statistical methodology discussed in class, along with clear demonstration of your understanding, using a multiple linear regression data set. Your... more

Follows • 1

Answers •1

Statistics

12/13/22

Question on statistics homework

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 15 19 11 45 Female 3 6 5 14 Total 18 25 16 59 If one student is chosen at random,Find the... more

Follows • 1

Answers •1

Statistics

12/12/22

Suppose a rectangular patio has an area of 24 ft² and its length is 2 more than its width. What is its length, width, and perimeter?

Follows • 1

Answers •3

Statistics

12/12/22

p-value test, a critical value test, and a confidence interval test.

A statistic professor at UCSD where statistics classes have 350 students, gave his students a satisfaction survey on self-evaluation of how much they learned in the class. The survey was a rating... more

Follows • 1

Answers •1

Statistics

12/12/22

Hypothesis testing

For the following, find the p-value and the critical value to test the null-hypothesis. a. The test statistic is Z = -2.5 with a claim that the population p < 0.75, and α = .05. b. The test... more

Follows • 1

Answers •1

Statistics

12/12/22

finding sample size statistic

The Oxford IQ test is designed to have a mean of 100 pts and a standard deviation of 15 for normal adults. Find the sample size necessary to estimate the mean IQ score of college professors. We... more

Follows • 1

Answers •1

Statistics Spss

12/12/22

What test to run in SPSS?

Are reading scores, writing scores, math scores and science scores related?

Follows • 1

Answers •3

Statistics

12/10/22

A distribution of values is normal with a mean of 6.7 and a standard deviation of 21.8. Find P71, which is the score separating the bottom 71% from the top 29%.

I am super confused on how to solve this problem... any help?

Follows • 1

Answers •1

Statistics Test Preparation

12/10/22

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.77. You use a significance level of α = 0.002 .

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.77. You use a significance level... more

Follows • 1

Answers •1

Statistics

12/10/22

find the area in the right tail more extreme than z=-2.64 in a standard normal distribution

Follows • 1

Answers •1

Statistics Probability

12/10/22

What type of hypothesis?

A teacher wanted to know if her student ice cream preference was different than in previous years. The pie chart below represents the previous percentages. This year, 32 chose vanilla, 31 chose... more

Follows • 1

Answers •1

An electronic product takes an average of 3hours to move through an asset line. If the standard deviation is 0.6 hours , what’s the probability that an item will take between 3 and 4.8 hours to move

A researcher selects a sample using a list of possible subjects. She uses a random number to select the first​ subject, and then selects every tenth subject on the list. What is this an example​ of?

the probability mass function of a random variable X is given by pr(x)=cµ^2/x! x=1,2,3.where µ is some positive value .find the constant c. (1)p(x>2) .(2)pr(x=0)

The area that lies between z=-1.08 and z=- 1.53

When taking a certain drug 8.5% experience nausea as a side effect.

A population of values has a normal distribution with μ = 135.4 and σ = 80.7. You intend to draw a random sample of size n = 12 .

Ten pairs of data yield r = 0.92 and the regression equation y^=8x+3. Also, y¯=−3.2 What is the best predicted value of y for x=7 ?

The mean percent of childhood asthma prevalence in 43 cities is 2.14​%. A random sample of 31 of these cities is selected.

Graphing a linear relationship with a categorical variable

If n=330 and p-hat=0.5, construct a 90% confidence interval

Statistics and Probability - tossing a coin

Calculate the mean absolutee deviation (MAD) MAD= 2+3+4+4+4+5+5+6+6+6+7+8

Calculate the mean absolutee deviation (MAD) MAD= 2+3+4+4+4+5+5+6+6+6+7+8

Basic concept in statistical inference

Hello I need help with a statistical methodology project

Question on statistics homework

Suppose a rectangular patio has an area of 24 ft² and its length is 2 more than its width. What is its length, width, and perimeter?

p-value test, a critical value test, and a confidence interval test.

Hypothesis testing

finding sample size statistic

What test to run in SPSS?

A distribution of values is normal with a mean of 6.7 and a standard deviation of 21.8. Find P71, which is the score separating the bottom 71% from the top 29%.

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.77. You use a significance level of α = 0.002 .

find the area in the right tail more extreme than z=-2.64 in a standard normal distribution

What type of hypothesis?

Still looking for help? Get the right answer, fast.

OR

RELATED TOPICS

RELATED QUESTIONS

statistics

statistics

I need a creative ideas

RECOMMENDED TUTORS

find an online tutor

A researcher selects a sample using a list of possible subjects. She uses a random number to select the first subject, and then selects every tenth subject on the list. What is this an example of?

The mean percent of childhood asthma prevalence in 43 cities is 2.14%. A random sample of 31 of these cities is selected.