Joshua L.

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

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

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

05/03/24

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

05/01/24

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

04/24/24

SAT scores are normally distributed with a mean and standard deviation

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is interested in estimating the average SAT score of first-year students. If... more

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Statistics

04/24/24

A researcher might estimate the average height with the following sample heights

A researcher must estimate the average height (in inches) with the following sample heights: 66.1 59 66.9 72.1 72.8 68.6 62.7 Assuming the population of heights are normally distributed, find the... more

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Statistics

04/24/24

Estimate the population mean

Estimate the population mean by finding a 95% confidence interval given a sample of size 15, with a mean of 47.8 and a standard deviation of 11.2.CorrecConfidence Interval: What is the 95%... more

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Statistics

04/22/24

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are:

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are: 99.3 97.6 98 96.9 97.2 99.5 96.4 96.5 97.8 98.5 98.3 99.1 Assume high temperatures are normally... more

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Statistics

04/22/24

Use the following sample to estimate a population mean .

Use the following sample to estimate a population mean �. 30.8 59.7 41.5 62.6 29.5 57 35.4 37.7 48.1 45 58 28 57.5 54.7 57.3 Find the 90% confidence interval about the population... more

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Statistics

04/22/24

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are:

The high temperatures (in degrees Fahrenheit) of a random sample of 12 small towns are: 99.3 97.6 98 96.9 97.2 99.5 96.4 96.5 97.8 98.5 98.3 99.1 Assume high temperatures are normally... more

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Statistics

04/22/24

How many students

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is interested in estimating the average SAT score of first-year students. If... more

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Prealgebra

04/19/24

A bag contains 4 red marbles, 6 blue marbles and 5 green marbles. If three marbles are drawn out of the bag, what is the exact probability that all three marbles drawn will be green?

Make sure your answer is in fraction form.

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Algebra 1

04/17/24

In a direct variation, y=12 when x=2. Write a direct variation equation that shows the relationship between x and y.

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Algebra 2

04/17/24

Given a normally distributed data set of 600 students grades in Algebra 2, what is the approximate number of students that fall within two standard deviations from the mean

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Elementary Math

04/16/24

is 0.188 larger than 0.053

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Statistics

04/16/24

The population of weights of a particular fruit is normally distributed, with a mean of 766 grams and a standard deviation of 14 grams. If 8 fruits are picked random, then 20% of the time

The population of weights of a particular fruit is normally distributed, with a mean of 766 grams and a standard deviation of 14 grams. If 8 fruits are picked random, then 20% of the time, their... more

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Statistics

04/16/24

helppp plz I was able to get the first but second one is confusing, please and thank you!

The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 37 for a sample of size 12 and standard... more

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Statistics

04/15/24

what is the p value

Test the claim that the proportion of people who own cats is significantly different than 30% at the 0.02 significance level. Based on a sample of 800 people, 39% owned catsThe p-value... more

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Algebra 2

04/12/24

Chapter 3 - intermediate algebra

1) A metal stamping plant is considering purchasing a new piece of equipment. The machine they currently use has a setup cost of $1,475 and a cost of $4.50 per impression. The new machine has a... more

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Statistics Biostatistics

04/09/24

URGENT Unsure of which statistical test to use

I am assessing the effect of premature birth on cognitive development. I conducted a survey with quantitative answers on a scale (e.g., how easy to you find mathematics? Very hard, moderately hard,... more

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Statistics

04/08/24

Find the population standard deviation and round to one more place than the data

15,18,13,9,12

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Statistics

04/05/24

help me please to solve this problem

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 71.3 69.2 68 62.8 98.6 26.2 63.8 60.3 Find the 80% confidence interval. Enter your answer as... more

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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.

The following bivariate data set contains an outlier.

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

You run a regression analysis on a bivariate set of data

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

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

SAT scores are normally distributed with a mean and standard deviation

A researcher might estimate the average height with the following sample heights