8,918 Answered Questions for the topic statistics

Statistics

10/06/23

Based on the histogram, what is the sample size?
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Statistics

10/06/23

The uniform distribution of a random variable X is given in the figure below.

From the figure, what is the probability that a randomly selected X is between 0.36 and 1.56? Round your answer to two decimal places.
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Statistics

10/06/23

If one card is randomly selected from a well-shuffled standard deck of 52 cards, what is the probability that the card selected is not an Ace? Leave your answer as a reduced fraction.
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Statistics

10/06/23

how many ways can 17 objects be selected 3 at a time

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Statistics

10/06/23

Chapter 8 SPSS Scenarios

Instructions: Please enter the data below into SPSS and calculate a one-sample t-test for the two (both) scenarios below.  1.    SPSS Scenario: A group of health researchers wanted to... more
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Statistics

10/06/23

For 36 unemployed individuals, find the probability that the average time that they found the next job is more than 30 weeks.

A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 28 weeks. Assume that the length of unemployment is normally distributed with... more
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Statistics

10/05/23

Find the probability that a sample of size n=180 is randomly selected with a mean greater than 151.2. P(X̅ > 151.2) = 
A population of values has a normal distribution with mean=164 and standard deviation=78.3. You intend to draw a random sample of size n=180.Find the probability that a sample of size n=180 is... more
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Statistics

10/05/23

Find the probability that a single randomly selected value is between 110.1 and 111.2. P(110.1 < X < 111.2) = 
A population of values has a normal distribution with mean=111.2 and standard deviation=5. You intend to draw a random sample of size n=19.Find the probability that a single randomly selected value... more
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Statistics

10/05/23

If you pick 4 fruit at random, what is the probability that their mean weight will be between 769 grams and 771 grams
A particular fruit's weights are normally distributed, with a mean of 727 grams and a standard deviation of 26 grams.If you pick 4 fruit at random, what is the probability that their mean weight... more
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Statistics

10/05/23

If 3 items are chosen at random, what is the probability that their mean length is less than 7 inches?
A manufacturer knows that their items have a normally distributed length, with a mean of 8.1 inches, and standard deviation of 2 inches.If 3 items are chosen at random, what is the probability that... more
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Statistics

10/05/23

I'm looking for two answers for the homework
A pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and test 49 ​tablets, then accept the whole batch if there is only one or... more
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10/05/23

Operations Management question
The Pinewood Furniture Company produces chairs and tables from two resources: labor and wood. The company has 145 hours of labor and 100 board-ft. of wood available each day. Demand for chair is... more
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Statistics

10/04/23

If you randomly purchase 18 items, what is the probability that their mean life will be longer than 12 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7 years, and standard deviation of 2.9 years.If you randomly purchase 18 items, what is the probability... more
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Statistics Math

10/04/23

How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p*= 82%. You would like to be 99% confident that... more
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Statistics

10/04/23

If you randomly purchase 11 items, what is the probability that their mean life will be longer than 3 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.2 years, and standard deviation of 0.7 years.If you randomly purchase 11 items, what is the probability... more
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Statistics Probability

10/04/23

Suppose that events 𝐴, 𝐵, and 𝐶 are independent. Use the definition of independence to show that 𝐴 and 𝐵 ∪ 𝐶 are independent.
. Suppose that events 𝐴, 𝐵, and 𝐶 are independent. Use the definition of independence to show that 𝐴 and 𝐵 ∪ 𝐶 are independent.
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Statistics Math

10/04/23

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion.

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the population proportion. You would like to be 98% confident that your... more
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Statistics

10/04/23

What is probabilty of rolling die
When rolling a die 4 times what is the probabilty that you will getA.) 3, 4, 5, 6 in that orderB.) Two even numbers followed by two odd numbers in that order
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Statistics

10/03/23

Average height of adult men
Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the height of a man with a z-score of -0.39. Round your answer to one decimal place.
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Statistics

10/03/23

Find P9 in a normal distribution
A distribution of values is normal with a mean of 45.9 and a standard deviation of 53.5.Find P9, which is the score separating the bottom 9% from the top 91%.Enter your answer as a number accurate... more
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Statistics

10/03/23

Heights of 10 year old children
In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 55.6 inches, and standard deviation of 6... more
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Statistics

10/03/23

What is the probability
It is known that 65% of high school students study for the exam. What is the probability that 3 students will not study for the exam?
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Statistics

10/03/23

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.5 years, and standard deviation of 1.6 years.
The 9% of items with the shortest lifespan will last less than how many years?Give your answer to one decimal place.
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Statistics

10/03/23

Amount of Nicotine in a certain brand of cigarettes
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.895 grams and a standard deviation of 0.325 grams. Find the probability of randomly selecting a... more
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Statistics

10/03/23

Batch of thermometers
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested.... more
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