8,972 Answered Questions for the topic statistics

Statistics

12/05/22

Need help on this please!!
In a survey, 25 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $42 and standard deviation of $8. Construct a... more
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Statistics

12/05/22

Need help on this !!
In a survey, 12 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $36 and standard deviation of $9. Find the margin of... more
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Statistics Data Science

12/05/22

plotting a bell curve with percentile information
I have three sets of numbers representing a minimum, 25th percentile, a mean, a median, 75th percentile and a maximum. While I do not have any individual raw data and do not know the standard... more
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Statistics

12/05/22

Distribution statistic

A Acme company manfucature widgets. The distribution of widgets weights is bell-shaped. The widget weights have a mean of 46 ounces and a standard deviation of 5 ounces ( use the standard deviation... more
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Statistics

12/04/22

statistics homework review helppp
Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 15 17 8 40 Female 16 5 3 24 Total 31 22 11 64 If one student is chosen at random, Find the... more
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Statistics

12/03/22

Statistics homework help needed
The heights of adult men in America are normally distributed, with a mean of 69.7 inches and a standard deviation of 2.61 inches. The heights of adult women in America are also normally... more
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Statistics

12/02/22

A coin is tossed and an eight - sided die numbered 1 through 6 is rolled . Find the probability of tossing a tail and then rolling a number greater than 5
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Statistics

12/02/22

Statistics and Probability

In a survey, 32 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $43 and standard deviation of $10. Find the margin of... more
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Statistics

12/02/22

Statistics and Probability

You intend to estimate a population mean μμ with the following sample. 53.5 44.2 38.2 45 48.1 42.9 42.2 49.6 41.5 28.3 You believe the population is normally distributed. Find the 80% confidence... more
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Statistics

12/01/22

According to the Nielsen Company, the mean number of TV sets in a U.S. household in 2014 was 2.24. Assume the stamdard deviation is 1.1. A sample og 80.
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Statistics

11/30/22

tnagerine problem
A banana republic held a parliamentary election, and every one of the citizens voted. Everyone who voted for the tangerine party likes tangerines. 90% of the people who voted for one of the other... more
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Statistics Probability

11/30/22

Confidence Interval
The amount of trash generated by US households (in lbs per day) is Normally distributed. You a random sample of 8 people gives you an average of 10.00 lbs and a sample stdev of 5 lbs. What is the... more
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Statistics Math Sat Math

11/30/22

What's the probability that there are no more than 6 ​non-smartphone owners?
According to a​ study, ​9% of teenagers​ (age 13-18) have a smartphone. Suppose eight teenagers are selected at random. What's the probability that there are no more than 6 ​non-smartphone owners?
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Statistics

11/29/22

Statistics and Probability

the time it takes me to wash the dishes is uniformly distributed between 6 minutes and 11 minutes. What is the probability that washing dishes tonight will take me between 8 and 10 minutes? Give... more
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Statistics

11/29/22

A manufacturing machine has a 5%defect rate. If 2 items are chosen at random, what is the probability that at least one will have a defect

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Statistics

11/29/22

I need help with this question. On how to get started.
Based on a sample of 20 men, 40% owned catsBased on a sample of 20 women, 55% owned catsThe test statistic is:  (to 2 decimals)The p-value is:  (to 2 decimals)
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11/29/22

Probability (Statistics)
A polling organization randomly selects an adult American for a survey about credit card usage. Suppose 53% of the population is male. Suppose 9.8% of males smoke cigars and 1.36% of females smoke... more
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Statistics Math Biostatistics

11/28/22

Write out a proper interpretation for this confidence interval.

The Professor from Gilligan's Island made a six sided die, each side numbered from 1 to 6, from a palm tree and wants to calculate a 90% confidence interval for what the true proportion would be... more
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Statistics Math Biostatistics

11/28/22

What is the probability of obtaining a sample proportion less than 0.30?
It is known that the population proportion of BYU-Idaho students that go cross country skiing at least once winter semester is p = 0.38. Suppose a random sample of size n = 80 BYU-Idaho students is... more
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Statistics

11/28/22

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?
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Statistics

11/28/22

Morgan paid $15.50 for 5 slices of pizza and 2 drinks. Pat got 8 slices of pizza and 4 drinks for $26.00. How much would an order of 2 slices of pizza and 2 drinks cost?
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Statistics

11/28/22

A population has parameters μ = 71.9 and σ = 11.3 .

You intend to draw a random sample of size n = 49 . What is the mean of the distribution of sample means? μ ¯ x = What is the standard deviation of the distribution of sample means?... more
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Statistics

11/28/22

Advanced statistics
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 97.1-cm and a standard deviation of 1.8-cm. For shipment, 25 steel rods are bundled... more
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11/27/22

The probability of a plane crashing on a single trip in 2010 was 0.00000276. Find the approximate probability that in 10 million flights, there will be fewer than 17 crashes.

You may need to use the appropriate appendix table or technology to answer this question.The probability of a plane crashing on a single trip in 2010 was 0.00000276. Find the approximate... more
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11/27/22

If you roll a die 100 times, what is the approximate probability that you will roll between 9 and 17 ones, inclusive? (Round your answer to two decimal places.)
You may need to use the appropriate appendix table or technology to answer this question.If you roll a die 100 times, what is the approximate probability that you will roll... more
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