1,011 Answered Questions for the topic Statistics Question

Statistics Question

03/15/15

you're told that the shape of the distribution of burning times for light bulbs is balanced ..... ??
you're told that the shape of the distribution of burning times for light bulbs is balanced, with a mean burning time of about 1500 hours. therefore you can conclude that the median burning... more
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Statistics Question

03/13/15

Standard Deviation and Mean
In an earlier study men with coronary heart disease has a mean systolic blood pressure of 148 mmHg with a standard deviation of 16.5 mmHg. You wish to repeat this study with a similar population of... more
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Statistics Question

03/10/15

Which of the following is the correct way, in classical hypothesis-testing, to understand a p-level of 0.01?
a) The probability that the null hypothesis is true is 0.01 b) The probability that the sample statistic shows the true relationship or parameter is 0.01. c) If the null hypothesis were true, the... more
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Statistics Question Math Help Probability Stats

03/09/15

Statistics Homework Help!
A surprise quiz contains three multiple-choice questions: Question 1 has four suggested answers. Question 2 has three, and Question 3 has two. A completely unprepared student decides to answer... more
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Statistics Question Math Help

03/08/15

Math question about Statistic
1. Students need to score 30 or above in the final exam to pass a module at University A. Assume final exam score is normally distributed.   (a) The teacher of STAT101, a module at University A,... more
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Statistics Question

03/07/15

A sample of 16 small bags of the same brand of candies was selected. Assume that the population distribution of bag
Need answer
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Statistics Question

03/06/15

Statistics- How to Find P-Value on this question
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of... more
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Statistics Question Statistics Distribution

03/06/15

Statistics problem about large samples and normal distribution
A researcher has collected a large sample of IQ scores from his friends and relatives. He claims that because his sample is large and the distribution of his sample scores is very close to the bell... more
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Statistics Question

03/03/15

probability question
In a particular game players spin a circular spinner split into 3 unequal regions. Half of the spinner is colored orange. A quarter of the spinner is green and the remaining quarter is blue. A) if... more
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Statistics Question Math Word Problem

03/01/15

true or false, For a population with a mean of 80 and a standard deviation of 10, only 2.28 percent of the scores are greater than X = 100. True
Social Statistics   
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Statistics Question Statistics

03/01/15

2. The proportion to use belts). It also depends on local law. In New York city, police can stop a driver who is not belted.
2. The proportion of drivers who use seat belts depends on things like age (young people are more likely to go unbelted) and gender (women are more likely to use belts). It also depends on local... more
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Statistics Question

02/25/15

Chi Square
At a school pep rally, a group of sophomore students organized a free raffle for prizes. They claim that they put the names of all of the students in the school in the basket and that they randomly... more
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Statistics Question

02/24/15

Approximately 2.5% of the bags collected would contain more than ___ Pints?
After a blood drive, the volumes of 440 bags of blood are measured. They are found to have a mean volume of 1 pint within standard deviation of 0.05. Approximately 2.5% of the bags collected would... more
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Statistics Question

02/22/15

probability
tossing heads in a coin toss and rolling a 6 on a die independent or dependent event  
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Statistics Question

02/22/15

Estimate the median and standard deviation for the salaries of employees of a certain company summarized below:
Salary ($)                       Employees 5,001 - 10,000                         16 10,001 - 15,000                       15 15,001 - 20,000                       11 20,001 - 25,000          ... more
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Statistics Question Z Score And Probability

02/21/15

z score and probability
suppose a bell shaped distribution, with a mean of 70 mph and a std dev of 8 mph. Calculate the Z score for someone traveling 95 mph. Is it likely to see someone going this fast? We must use Excel... more
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Statistics Question Statistics Stats Normal Distribution

02/21/15

Three complicated statistics (Normal Distribution) questions
1) The lengths in minutes of feature films for the current year follow a normal distribution with a mean of 109 minutes and a standard deviation of 12 minutes. What percentage of feature films in... more
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Statistics Question Statistics Probability Word Problem

02/21/15

Stats word probability problem
If possible, please assist me with the formula and finding the answer please!   In a simple game, a six-sided die is rolled 4 times. If all four rolls result in either 1 or 2, then the player... more
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Statistics Question

02/18/15

Statistics, Confidence Intervals.
A soft drink manufacturer wishes to know how many soft drinks males over age 26 drink in a week. Their consultant thinks that the mean is 4.3 soft drinks per week. Assume a previous study found the... more
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Statistics Question

02/12/15

If we take out an SRS of n=500 individuals from a population and 25% of them are Hispanic. How many Hispanics can you expect from a sample?
If we take out an SRS of n=500 individuals from a population and 25% of them are Hispanic. How many Hispanics can you expect from a sample?
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Statistics Question

02/08/15

must construct a frequency distribution, relative frequency distribution, frequency histograms of a data, relative frequency histogram of the data, describe the
  4.2, 8.6, 9.2, 9.6, 9.6, 9.7, 10.2, 10.5, 10.6, 10.6, 10.9, 10.9, 11.3, 11.4, 11.6, 12.3, 12.6, 13.0, 13.3, 13.4, 13.9, 14.0, 14.3, 14.7, 14.8, 15.5, 15.9, 15.9, 16.1, 16.1, 16.1, 16.2, 17.8,... more
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Statistics Question

02/07/15

22% committed crimes, 28% attended college, and 56% did neither.
What percent of people in the study who went to college also committed crimes?
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Statistics Question

02/07/15

22% committed crimes, 28% attended college, and 56% did neither.
What percent of people in the study both committed a crime and attended college?
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Statistics Question

02/07/15

Consider the following list of pizza toppings: Mushrooms, olives, peppers, pepperoni, sausage, onions, and pineapples
1. How many different kinds of pizza can you order?   2. How many different kinds of pizza with only one topping can you order?   3. How many different kinds of pizza with at least one topping... more
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Statistics Question

02/06/15

Additional Info Provided: Suppose 750 students are admitted. What is the chance that the class size will be at least 720 students?
Hello, I'm really struggling with how to approach this problem. Thank you for any advice.   *Edited Original Question*    Sorry.....you are absolutely correct in that I didn't provide enough... more
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