8,971 Answered Questions for the topic statistics

08/10/22

Probability &statistics
News reports tell us that the average American is overweight. Many of us have tried to trim down to our weight when we finished high school or college. And, in fact, only 20% of adults say they do... more
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Statistics

08/09/22

Statistics HW Question!
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 43 farming regions gave a sample mean of  = $6.88 per 100 pounds of watermelon. Assume that 𝜎 is... more
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Statistics

08/07/22

Statistics Question
Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a... more
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Statistics

08/07/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Statistics

08/06/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more
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Statistics Math Probability

08/06/22

Probability of cards
How many numbers of possible live card hands (hands in five-card poker) drawn without replacement from a standard deck of 52 playing cards?Please give full details!
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Statistics Math Probability

08/06/22

Estimation of probability

Let the random variable X be the number of months that a certain owner of an estate needs to pay a loan in the Bank if he/she has a contract with insurance company to help him/her to pay a loan.Say... more
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Statistics Probability

08/03/22

Discrete probability distribution

You are given the following discrete probability distributions: X        0        1          2            3 P(X)  0.10   0.20     0.30      0.40 A. Compute the mean(expected value) B. Compute the... more
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Statistics Math Probability

08/03/22

Probability statistics discrete
The weights of the male diabetic patients of a given hospital are normallydistributed with mean 68kgs and standard deviation 4kgs. If a patient is selected randomly.a)What is the probability that... more
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Statistics Probability

08/03/22

Statistics probability

Suppose that the number of a village development committee have been categorized as shown in the following... more
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Statistics Probability

08/03/22

Binomial distribution

Using the binomial distribution to determine the following: a)If n = 4 and p = 0.20, then P(X=1) = ? b)If n = 3 and p = 0.10, then P(X<2) = ? c)If n = 6 and p = 0.30, then P(X>1) = ?
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Statistics Math

08/03/22

Statistics - Hypothesis Testing

A textile fiber manufacturer is investigating a new drapery yarn, which the company claimshas a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms.The company wishes... more
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Statistics

08/03/22

Hypothesis Testing - Power of Test
Suppose we are going to test null hypothesis whether the mean height of student grade 10is 115cm against the alternative hypothesis as µ > 115 cm. Assuming that the height ofthe student is... more
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Statistics

07/31/22

The annual rainfall in a certain region is approximately normally distributed with
The annual rainfall in a certain region is approximately normally distributed with mean 41.6 inches and standard deviation 5.4 inches. Round answers to the nearest tenth of a percent.a) What... more
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Statistics

07/31/22

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 54.3 inches, and standard deviation of 2.4... more
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Statistics

07/31/22

Statistics help

Suppose you have 18 red marbles and 24 blue what is the probability of pulling two red at the same time ?
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Statistics

07/30/22

What's the percentage using the quantitative mean and SD?

The GRE has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores are distributed normally.(A) What percentage of test takers score above 600?(B) What percentage... more
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Statistics

07/29/22

please help! Due tonight!
Out of 300 people sampled, 162 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to three... more
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Statistics

07/29/22

Please help! due tonight and I am stumped
In a recent Super Bowl, a TV network predicted that 74 % of the audience would express an interest in seeing one of its forthcoming television shows. The network ran commercials for these shows... more
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Statistics

07/29/22

Statistics and Probablity
The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive final exam were normally distributed, and the Z scores for some of the... more
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Statistics

07/29/22

prob. normal distribution
Slices of pizza for a certain brand of pizza have a mass that is approximately normally distributed with a mean of 66.1 grams and a standard deviation of 1.97 grams.c) What is the probability of... more
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Statistics Math

07/28/22

90% Confidence Interval for True Population Proportion
Suppose a mobile phone company wants to determine the current percentage of customers aged 50+ who use text messaging on their cell phones. How many customers aged 50+ should the company survey in... more
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Statistics

07/28/22

fully mediation or not?
I am using Process Marco Mediation ModelThe results are as follows:X-->Y total effect is not significant (c path= -.06, P=.109)X--> M significant (a path= -.34, p=000) M--> Y ... more
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Statistics

07/27/22

Standard Deviation Rule
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 55 ounces and a standard deviation of 3 ounces.Use the Standard Deviation... more
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Statistics

07/27/22

Stat - Confidence Intervals
The Human Toxome Project (HTP) is working to understand the scope of industrial pollution in the human body. Industrial chemicals may enter the body through pollution or as ingredients in consumer... more
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