36 Answered Questions for the topic Statistic

Statistic

02/23/22

Computing a Margin of Error: Confidence Interval for a Population Mean
You measure 49 dogs' weights, and find they have a mean weight of 30 ounces. Assume the population standard deviation is 12.2 ounces.Based on this, what is the margin of error associated with a 90%... more
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08/08/21

13.1: Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?
Suppose that 20​% of people have a dog​, 32​% of people have a cat​, and 8​% of people own both. What is the probability that someone owns a dog or a cat​?The probability of a person having a dog... more
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06/28/21

Normal Distribution
The town of KnowWearSpatial, U.S.A. operates a rubbish waste disposal facility that is overloaded if its 4699 households discard waste with weights having a mean that exceeds 26.7 lb/wk. For many... more
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06/06/21

Unless you are willing to invest for 27 years
Unless you are willing to invest for 27 years or more, 5% compound interest will not beat 10% simple interest. Is it true or falso?(Note: i cannot understand well that question, if you can give me... more
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Statistic Math Statistics Mean

06/06/21

Consider the list of numbers...
Consider the list of numbers: 12,13,14,15,15,16,16,17,20, __ Enter a number in the gap which will make the mean of all those number equal to 20.
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Statistic Math Problem Help

12/12/20

intro stat question

Data collected at the elementary schools in a county’s school districts showed that each year roughly 21% of students miss exactly one day of school, 19% miss 2 days, and 15% miss 3 or more days... more
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12/12/20

intro to statistics

At a certain school, approximately 65% of statistics students do their homework in time for it to be collected and graded. Assume that each student does homework independently. (a) In a class of... more
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Statistic Probability

11/14/20

Find probability
The faculty of a small eastern university is considering adding grade point average within a student's major to each transcript. You have been asked to sample students to determine student... more
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Statistic

07/28/20

statistic and probabilities

you are conducting a multinomial chi-square goodness of fit hypothesis teat for the claim that the 4 categories occur with the following frequencies: observed frequency: A-41 ... more
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Statistic

04/21/20

statistic question
According to the empire rule, what proportion of date would lie between +1 and +2 standard deviations? (Not percentage)
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07/19/19

Mr. Johnson's class is normally distributed with a class average of 75% and a standard deviation of 6. What are the quartiles of Mr. Johnson's class?
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Statistic

10/05/18

help me answe this question
On average, the parts from a supplier have a mean of 97.5 inches and a standard deviation of 6.1 inches. Find the probability that a randomly selected part from this supplier will have a value... more
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Statistic

06/15/18

The sum of deviations of a set of values x1,x2,x3,.,xN, measured from 50 is-10 and the sum of deviations of the values from 46 is 70 . Find the val.
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05/14/18

mean = 98.2 standard deviation = 0.62
mean is 98.2. standard deviation is 0.62. if one person is randomly selected, find the probability that the person's body temperature is at least 97 degrees
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Statistic

11/06/17

How could a RDT Be used to stimulate six games for a basketball player that shot 10 times per game and has a shooting percentage of 70%
How could a RDT Be used to stimulate six games for a basketball player that shot 10 times per game and has a shooting percentage of 70%
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09/17/17

can someone explain how to get the percentage?
Scores on the Wechsler Adult Intelligence Scale (WAIS) are approximately Normal with mean 97 and standard deviation 14. People with WAIS scores below 69 are considered intellectually disabled when,... more
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07/19/17

name the population 45% of chicago residents surveyed, own their own vehicle
Name the population 45% of chicago residents surveyed, own their own vehicle
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Statistic Probability

05/01/17

Bag Question
A bag has 6 red blocks and 4 green blocks. Cliff takes a block out of the bag at random, records the color, then replaces the block in the bag. He does this 20 times. Which answer shows the results... more
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04/17/17

confident intervals and central limit theorem.
A random sample of 39 cows was fed a special high-protein grain for a month. Each was weighed before and after and the average weight gained was 6.7 pounds, with standard deviation 7.1.i. Construct... more
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Statistic

04/09/17

A standard deck of cards is shuffled. Find the probability of getting the first 5 cards in this sequence: Ace, Ace, Ace, 10,10
This is a statistic question in probability 
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03/16/17

Application of Sets
A survey of 72 customers was taken at a bookstore regarding the types of books purchased. The survey found that 43 customers purchased mysteries, 33 purchased sciencefiction, 27 purchased romance... more
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11/28/16

Statistics Question!
Do adding multivitamin supplements to your daily diet help decrease the number of colds caught...is this a double blind or single blind study?
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Statistic

08/11/16

not sure if my answer is right
In a set of 36 months of data for medical leave that has a mean of 7 days per month and a standard deviation of 2.37, how many months are expected to have fewer than 9.37 days per month reported... more
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08/09/16

In general, increasing sample size (n) effects type I error (alpha) and type II error (beda) in which of the following ways
A. Alpha increases , beta decreases  B. Alpha increases , beta increases  C. Alpha decreases , beta decreases  D. Alpha decreases , beta increases 
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Statistic

07/13/16

Hypothesis help
I have a hard time interpreting my results and I need help with the rejection method.A local bank claims that the standard deviation of the checking account balances of its customers is $275. A... more
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