5,333 Answered Questions for the topic statistics

Statistics Math

19h

Probability statistics

Bicycles for hire at the Beach front are deemed beyond repair when one or both its wheels are damaged. According to current statistics, there is an 8% chance that the front wheel gets damaged and a... more
Statistics

21h

How to solve a statistics problem

Josh discovers that the distribution of heights of students in his class is normally distributed with a mean of 173.2 cm and a standard deviation of 11 cm. Answer the following questions about the... more
Statistics Math Probability

1d

The Dean of Mechanical Engineering....

The Dean of Mechanical Engineering is currently concerned with the amount of noise in the campus building, and plans on moving to the lower grounds. He claims that if all the classes will transfer,... more
Statistics Calculus Finite Math

1d

Find Pr [𝑋=2] .

There are 4 women and 2 men waiting on standby for a flight to New York. Suppose that 3 of these 6 people are chosen at random for the flight. If the random variable 𝑋 counts the number of women... more
Statistics

1d

2propztest results

the sample saysx1: 797n1:3066x2:275n2:2293p1:=p2<p2>p2p1>p2z=12.67764108p=4.071111688E-37how did they get p value?
Statistics Calculus Finite Math

1d

In how many different ways can these 3 tasks be assigned?

Part A: A committee has 7 members. 3 different members are needed for 3 special tasks: one member will promote plastic recycling, one member will promote glass recycling, and one member will... more
Statistics Calculus Finite Math

1d

How many students are interested in nuclear energy but are not interested in solar power?

In a group of 200 college students, it is learned that:* 150 are interested in solar power* 25 are interested in nuclear energy* 85 students are interested in solar power but are not interested in... more
Statistics Calculus Finite Math

1d

Find the maximum value of the objective function 2𝑥 − 𝑦 on this feasible set.

A bounded feasible set in the shape of a triangle has the three corner points: (1,1) , (3,5) and (5,4). Find the maximum value of the objective function 2𝑥 − 𝑦 on this feasible set.A. -3−3B. 11C.... more
Statistics Calculus Finite

1d

how many successes are expected?

A Bernoulli process has probability of success on any one trial of 𝑝= 1/10. If the Bernoulli process involves 𝑛=800 trials, then how many successes are expected?
Statistics

2d

Statistics homework help

A shopper in a grocery store purchases 22 items on average. A store manager believes that the mean is greater than 22. She surveyed a randomly selected group of 36 customers and found that the mean... more
Statistics

2d

Confidence Intervals

Suppose, after looking at some sample data, we find (26,48) for our 95% confidence interval estimate for a population mean μ.For this set of data, the point estimate for the mean is?The margin of... more
Statistics Probability

3d

Determine the mean and standard deviation of the population.

The mean of the sampling distribution of the sample mean is 100. If the population is normally distributed with a variance of 215, determine the mean and standard deviation of the population.
Statistics Spss

3d

What is the most suitable statistical test for nominal and ordinal data?

I have nominal data (American, Non-American) and ordinal data (5 Likert scale, the obstacles employees might face at work). I would like to know if non-American faces more obstacles at the... more

4d

Please I need help in Polynomial Remainder Theorem

1. The dimension of The volume of a container is modeled by a function V(x)= 𝑥3 + 3𝑥2 − 10𝑥 − 24. Let x cm represent the length, (x – 2) cm the width, and (x + 5) cm the height. Find one positive... more
Statistics Biology

4d

how many fragments?

If i have a string of 34 letters, how many unique fragments of five letters can I obtain? The letters are contiguous.More specifically, I need to know how many peptides (of five amino acid... more
Statistics Algebra 2

4d

Amanda earned a score of 940 on a national achievement test that was normally distributed. The mean test score was 850 with a standard deviation of 100

If 1000 students took the test, how many scored below Amanda? Use your z table.
Statistics

5d

Help on correlation coefficient

You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and the r value. The regression equation is reported asy= -61.19x+79.41and the r=0.4096.What... more
Statistics Math English Business

5d

International Business Question

Why is the movement of production factors limited in a international business?
Statistics

5d

At the 0.05 level of significance, does the data provide evidence to suggest that consumers in the Northeast spend more on average than the national average reported in the Bureau of Labor Statistics?

According to the document Consumer Expenditures, a publication of the Bureau of Labor Statistics, the average consumer spent $1736 on apparel and services in the last year. A researcher believes... more
Statistics

5d

What is the Lower Bound of the confidence interval?

In a sample of 80 children, the mean age at which they first began to combine words was 16.51 months with a sample standard deviation of 9.59 months. Construct a 95% confidence interval for the... more

5d

im not so good on this i need help its precalculus

The count in a bacteria culture was 700 after 10 minutes and 1900 after 30 minutes. Assuming the count grows exponentially,What was the initial size of the culture?   ___Find the doubling... more

5d

im lost on this precaluclus hw help please

The doubling period of a bacterial population is 20 minutes. At time t=90 minutes, the bacterial population was 90000.What was the initial population at time t=0?  ___ Find the size of the... more

5d

im a bit confused on how to start precalculus

A bacteria culture initially contains 2500 bacteria and doubles every half hour.Find the size of the baterial population after 60 minutes.   ____Find the size of the baterial population after 10... more

5d

can i get assistance on this im stuck this is precalculus

A wooden artifact from an ancient tomb contains 50 percent of the carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made? (The half-life of carbon-14 is... more

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