8,958 Answered Questions for the topic statistics

Statistics

10/07/22

Assume the random variable X is normally distributed with mean 50 and standard deviation 7 . Find the 67th percentile
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Statistics

10/07/22

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.
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Statistics

10/07/22

sample Test Statistic

You are testing the claim that the proportion of men who own cats is smaller than the proportion of women who own cats.You sample 100 men, and 80% own cats.You sample 200 women, and 75% own... more
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Statistics

10/06/22

GPA students mean

You are testing the claim that the mean GPA of night students is less than the mean GPA of day students.You sample 40 night students, and the sample mean GPA is 2.14 with a standard deviation of... more
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Statistics

10/06/22

Sample sizes question

Two samples are taken with the following numbers of successes and sample sizesr1 = 20  r2 = 30n1 = 50  n2 = 52Find a 85% confidence interval, round answers to the nearest... more
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Statistics Math Geometry

10/06/22

I already have the answer but I'm confused on how to put this in a calculator to get that solution.
How would I type this in a calculator? (Binomial Distribution)P( x=3)=(20) 0.053 (0.95)17=0.0596 3
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Statistics Probability

10/06/22

Introduction to statistics
Suppose a population has µ = 8 and δ= 3. Suppose a random sample of n= 36 is selected. What is the probability that the sample mean is between 7.8 and 8.2?
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Statistics Probability

10/06/22

Introduction satistics
The diameter of a shaft in an optical storage drive is normally distributed with a mean of 0.2508 inch and a standard deviation of 0.0005 inch. The specifications on the shaft are 0.2500± 0.0015... more
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Statistics Probability

10/06/22

Introduction to statistics
The Department of Meteorological Services (DMS) in Gaborone has been issuing warning about expected increases in temperatures in the coming days. A researcher wanted to know how some students at UB... more
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Statistics Probability

10/06/22

Statistics and probability distribution
Hailstorms are common phenomena in parts of a certain country. From past experience it has been shown that in a forestry plantation, there is about an 80% chance that certain tree... more
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Statistics

10/06/22

Compute the probability of randomly drawing 5 cards from a deck and getting exactly 3 spades.
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Statistics Math

10/05/22

im having trouble
Say you have a biased coin and you associate obtaining a head with the value 0 whereas obtaining a tail has a value of 2. Let X be the sum of the values obtained from tossing the coin three times.... more
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Statistics Math

10/05/22

im having trouble with this math question
Suppose a lab is developing a robust new test to look for diabetes in children. If a child actually has diabetes, the probability that the test will be positive is 82%, indicating they have... more
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Statistics Math

10/05/22

im having trouble with this math question
A survey of new Toyota Corolla owners has shown that during the first year of ownership, 15% of Corollas required repairs once, 7% required repairs twice, and 5% required repairs three or more... more
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Statistics

10/05/22

Two marbles are selected from a box containing 7 blue and 3 red marbles. what is the probability that a blue marble and a red marble are selected
Two marbles are selected from a box containing 7 blue and 3 red marbles. what is the probability that a blue marble and a red marble are selected
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Statistics

10/05/22

The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs.

The physical plant at the main campus of a large state university recieves daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a... more
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Statistics

10/05/22

Can I get help on this
Suppose the scores of students on an exam are Normally distributed with a mean of 298 and a standard deviation of 63. Then approximately 99.7% of the exam scores lie between the numbers  and  such... more
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Statistics

10/05/22

Am I able to get help on this please
If the average low temperature of a winter month in Rochester, NY is 18∘ and the standard deviation is 7.9, then according to Chebyshev's theorem, the percentage of average low temperatures in... more
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Statistics

10/04/22

STAT CLASS \\\\\\\
The probability of a tourist visiting an area cave is 0.70 and of a tourist visiting a nearby park is 0.61. The probability of visiting both places on the same day is 0.41.The probability that a... more
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Statistics

10/04/22

Suppose the wheel is spun twice. On the first spin, you place two bets: one on even and one on the first dozen.

Suppose the wheel is spun twice. On the first spin, you place two bets: one on even and one on the first dozen. On the second spin, you also place two bets: one on "high" and one straight up bet on... more
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Statistics

10/04/22

Hypothesis Testing
Hypothesis Testing A company manufactures car batteries with an average life span of 2 years or more. An engineer believes that that this value is less than that claimed by the company. Using 10... more
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Statistics

10/04/22

A binomial experiment has the given number of trials n and the given success probability p. n=9,p=0.4
A binomial experiment has the given number of trials n and the given success probability p. n=9,p=0.4
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Statistics

10/03/22

fill out table below

The table below describes students from 200 different colleges. The table shows the results of the subjects who have participated in binge drinking. Fill out the table below:   Binge... more
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Statistics Probability

10/03/22

Suppose that E and F are two events and that N(E and F)=430 and N(E)= 690. What is P(F|E)?
HELPPP MATH 120!!!!
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Statistics

10/02/22

Linear Regression
Statistics students in Oxnard College sampled 10 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The data are shown below: Number of Pages... more
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