35 Answered Questions for the topic Statistic

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

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

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
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.
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

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
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
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
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)
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

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
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%

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

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
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

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
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 

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

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?
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

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 
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

Probability question: Chances of winning

A contest will award 100 winners with a voucher each. There are 300 participants. Elly joined the contest 3 times, but entering using her details, her sister's details, and her mother's details.... more

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