945 Answered Questions for the topic Statistics Question

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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Statistics Question

02/05/15

In two major golf tournaments one professional golfer finished second and ninth, while another finished sixth & fifth.
Comment on the argument that since 2+9=6+5, the overall performance of the two golfers in these two tournaments was equally good
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Statistics Question

02/05/15

If all the values in a set are increased by 10, does the range also increase by 10,? explain?
Statistics question pls explain me 
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Statistics Question

02/05/15

if the value for the median of a set is not found in the data set what must be true about the data set?
It's statistics question  pls help me 
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Statistics Question

02/04/15

Stats word problem
4. The probability that an adult male is shorter than 66 inches is 0.3; that he is between 66 and 70 inches is 0.5; and that he is taller than 70 inches is 0.2. If two males are picked at random,... more
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Statistics Question

02/04/15

Stats word problem
3. The probability that a person picked at random is over 65 years old is 0.12. If two people are picked at random, find the probability that: a. they are both over 65b. neither is over 65c. at... more
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Statistics Question

02/04/15

Stats word problem
2. A fair die is rolled twice. Find the probability of the following.a. rolling a sum of 10 on the two rollsb. rolling a sum not equal to 5 on the two rollsc. rolling a 2 first, then a 6d. rolling... more
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Statistics Question

02/04/15

Stats work problem
1. Four hundred people attending a party are each given a number, 1 to 400, for a door-prize drawing. One number is drawn at random to determine the winner. Find the probability that the number... more
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Statistics Question

02/02/15

Statistical Help
Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.887 and the equation of the regression line is y = -2.86 +... more
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Statistics Question

02/02/15

Statistical Help
Assume that the significance level is a = 0.05.  Use the given information to find the P-value and the critical value with H1 ; P ≠1/2, the test statistic is z = -1.36   p-value = ____   the... more
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Statistics Question

02/02/15

Statistical Help
In a test of the effectiveness of garlic for lowering cholesterol, 44 subjects were treated with garlic in a processed tablet form.  Cholesterol levels were mearsured before and after the... more
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Statistics Question

02/02/15

Statistical Question
If np≥5 and nq≥ 5 estimate P(more than 4) with n=14 and p = 0.7 by using the normal distribution as an approximation to the binomial distribution if np<5 or nq<5, then state tha the normal... more
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Statistics Question

02/02/15

Statistical Help
A survey found that women heights are normally distributed with mean 63.4 in. and standard deviation 2.5 in. A branch of the military requires women's heights to be between 58in and 80 in.A) Find... more
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Statistics Question

02/01/15

Compute the range and sample standards deviation for strength of the concrete 3980, 4050, 3400, 3000, 2940, 3810, 4050, 4020
The range and sample 
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Statistics Question

01/19/15

the area that lies between Z=-0.23 and Z=0.23 is
the area that lies between Z=-0.23 and Z=0.23 is
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Statistics Question Statistics

01/18/15

Statistic Question - I am trying to solve this problem but I dont know how! Could someone help me? Thank you!
An underwriter of home insurance policies studies the problem of home fires resulting from wooding-burning furnaces. Of all homes having such furnaces, 30% own a type 1 furnace, 25% a type 2... more
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Statistics Question

01/17/15

Statistic Question - I am trying to solve this problem but I dont know how! Could someone help me? Thank you!
Of a finance company`s loans, 1% are defaulted (not completely repaid). The company routinely runs credit checks on all loan applicants. It finds that 30% of defaulted loans went to poor risks, 40%... more
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