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Statistics

05/08/24

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 133.7-cm and a standard deviation of 0.7-cm.

Find the probability that the length of a randomly selected steel rod is greater than 135.7-cm. P(X > 135.7-cm) =

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Statistics

05/08/24

Let represent the full height of a certain species of tree. Assume that has a normal probability distribution with a mean of 99.8 ft and a standard deviation of 5.4 ft.

A tree of this type grows in my backyard, and it stands 100.9 feet tall. Find the probability that the height of a randomly selected tree is as tall as mine or shorter. = IncorrectMy neighbor also... more

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Statistics

05/08/24

In her MAT135 class, professor Alayeb found that the mean score of the first exam was 96. Suppose that the scores are normally distributed with a standard deviation of 19 points.

What is the probability that a randomly selected score is less than 71? = What is the probability that a randomly selected score is more than 82? = what is the probability that a randomly selected... more

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Statistics

05/08/24

Let represent the full height of certain species of tree. Assume that is normally distributed with a mean of 41.5 feet and a standard deviation of 39.2 feet

FFind the probability that the full height of a randomly selected tree is greater than 49.3 feet. =

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Statistics

05/08/24

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 266.8-cm

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 266.8-cm and a standard deviation of 2.2-cm.A company produces steel rods. The lengths of the... more

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Statistics

05/08/24

Annual high temperatures in a certain location have been tracked for several years.

Annual high temperatures in a certain location have been tracked for several years. Let X represent the year and Y the high temperature. Assume that temperature is independent each year.Based on... more

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Statistics

05/07/24

Using your favorite statistics software package, you generate a scatter plot with a regression equation.

Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported as y=-91.75⁢x+82.09and... more

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Statistics

05/07/24

The following bivariate data set contains an outlier.

The following bivariate data set contains an... more

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Statistics

05/07/24

Use linear regression to find the equation for the linear function that best fits the data.

Use linear regression to find the equation for the linear function that best fits this data. Round both numbers to two decimal places.Write your final answer in a form of an... more

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Statistics

05/07/24

Use linear regression to find the equation for the linear function.

Use linear regression to find the equation for the linear function that best fits this data. Round both numbers to two decimal places. Write your final answer in a form of an... more

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Statistics

05/07/24

Annual high temperatures in a certain location have been tracked for several years.

Annual high temperatures in a certain location have been tracked for several years. Let X represent the year and Y the high temperature. Assume that temperature is independent each year.Based on... more

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Statistics

05/07/24

You run a regression analysis on a bivariate set of data

You run a regression analysis on a bivariate set of data (n=79). You obtain the regression equation y=3.362⁢x+-24.355with a correlation coefficient of r=0.725 (which is significant at a=0.01). You... more

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Statistics

05/07/24

Based on the data shown below, calculate the correlation coefficient

Based on the data shown below, calculate the correlation coefficient (rounded to three decimal... more

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Statistics

05/03/24

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age. A sociologist claims that births to mothers under 20 years of age is decreasing. The sociologist... more

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Statistics

05/02/24

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age. A sociologist claims that births to mothers under 20 years of age is decreasing. The sociologist... more

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Statistics

05/02/24

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home.

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home. A researcher claims it has increased and decides to survey 100 adults. Test the... more

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Statistics

05/02/24

An article in the San Jose Mercury News stated that students in the California state university system.

An article in the San Jose Mercury News stated that students in the California state university system take 5 years, on average, to finish their undergraduate degrees. A freshman student believes... more

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Statistics Psychology

05/01/24

The mean of the population on variable X is 5.00 and the standard deviation is 1.25. Suppose your value on variable X is 6.25. What is your z-score?

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Statistics

05/01/24

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home.

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home. A researcher claims it has increased and decides to survey 100 adults. Test the... more

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Answers •1

Statistics

05/01/24

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age. A sociologist claims that births to mothers under 20 years of age is decreasing. The sociologist... more

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Answers •1

Statistics

05/01/24

An article in the San Jose Mercury News stated that students in the California State University

An article in the San Jose Mercury News stated that students in the California state university system take 5 years, on average, to finish their undergraduate degrees. A freshman student believes... more

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Statistics

05/01/24

At most 68% of people mind if others smoke near a building entrance.

At most 68% of people mind if others smoke near a building entrance. Express the null and alternative hypotheses in symbolic form for this claim (enter as a percentage).

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Statistics

05/01/24

Please help me find a graduate stutor in measures and tests

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Statistics

04/28/24

Confidence interval question

A 90 percent confidence interval for the slope of a regression line is determined to be (-0.181, 1.529). Which of the following statements must be true?a) The correlation coefficient of the data is... more

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Statistics

04/27/24

The U.S. Census Bureau conducts a study to determine the time needed to complete the short form.

The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 20 people. The sample mean is 8.2 minutes. There is a sample standard deviation... more

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 133.7-cm and a standard deviation of 0.7-cm.

Let represent the full height of a certain species of tree. Assume that has a normal probability distribution with a mean of 99.8 ft and a standard deviation of 5.4 ft.

In her MAT135 class, professor Alayeb found that the mean score of the first exam was 96. Suppose that the scores are normally distributed with a standard deviation of 19 points.

Let represent the full height of certain species of tree. Assume that is normally distributed with a mean of 41.5 feet and a standard deviation of 39.2 feet

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 266.8-cm

Annual high temperatures in a certain location have been tracked for several years.

Using your favorite statistics software package, you generate a scatter plot with a regression equation.

The following bivariate data set contains an outlier.

Use linear regression to find the equation for the linear function that best fits the data.

Use linear regression to find the equation for the linear function.

Annual high temperatures in a certain location have been tracked for several years.

You run a regression analysis on a bivariate set of data

Based on the data shown below, calculate the correlation coefficient

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home.

An article in the San Jose Mercury News stated that students in the California state university system.

The mean of the population on variable X is 5.00 and the standard deviation is 1.25. Suppose your value on variable X is 6.25. What is your z-score?

From previous studies, it is concluded that 76% of car crashes occur within 2 miles of the motorists home.

In 2006, 10.6% of all live births in the United States were to mothers under 20 years of age.

An article in the San Jose Mercury News stated that students in the California State University

At most 68% of people mind if others smoke near a building entrance.

Please help me find a graduate stutor in measures and tests

Confidence interval question

The U.S. Census Bureau conducts a study to determine the time needed to complete the short form.

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