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August 20, 2014

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

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Statistics
Air America has a policy of booking as many as 15 persons on an airplane that can seat only 14. (Past studies have revealed that only 86% of the booked passengers actually arrive for the flight.) Find the probability that if Air America books 15 persons, not enough seats will ...
Sunday, June 2, 2013 at 11:26pm

Statistics
Individuals who have a certain gene have a 0.50 probability of contracting a certain disease. Suppose that 1,940 individuals with the gene participate in a lifetime study. What is the standard deviation of the number of people who eventually contract the disease? Round your ...
Sunday, June 2, 2013 at 11:25pm

Statistics
In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
Sunday, June 2, 2013 at 11:24pm

Statistics
In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
Sunday, June 2, 2013 at 11:24pm

Statistics
In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
Sunday, June 2, 2013 at 11:24pm

Statistics
In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
Sunday, June 2, 2013 at 11:24pm

Statistics
In an elementary school, 25% of children wear glasses. Suppose that a random sample of 64 children is selected. Find the mean number of children in the sample who wear glasses. Round your answer to the nearest integer.
Sunday, June 2, 2013 at 11:24pm

Statistics
Assume that in a binomial experiment that n = 12, p = 0.28, and x = 4. Use the binompdf command in the TI-84 calculator to find the probability. Round your answer to 2 decimal places.
Sunday, June 2, 2013 at 11:23pm

Statistics
The probability that a randomly selected individual in a certain community has made an online purchase is 0.45. Suppose that a sample of 10 people from the community is selected, what is the probability that at most 3 of them has made an online purchase? Round your answer to 2...
Sunday, June 2, 2013 at 11:22pm

Statistics
The probability that a student uses the Academic Resource Center on a regular basis is 0.26. In a group of 18 students, what is the probability that exactly 8 of them use the Academic Resource Center on a regular basis? Round your answer to 2 decimal places.
Sunday, June 2, 2013 at 11:21pm

Statistics
In the library on a university campus, there is a sign in the elevator that indicates a limit of 16 people. in addition there is a weight limit of 2500 lbs. assume that the average weight of students, faculty, and staff on campus is 150 lbs, that the standard deviation is 27 ...
Sunday, June 2, 2013 at 9:25pm

Statistics
In a study on caffeine and stress, college students indicated how many cups of coffee they drink per day and their current stress level on a scale of 1 to 10. Obtain the appropriate correlation coefficents.
Sunday, June 2, 2013 at 5:11pm

STATISTICS
(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...
Sunday, June 2, 2013 at 3:10pm

Statistics
You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes that have been sold. ...
Sunday, June 2, 2013 at 2:28pm

Statistics
Calculate the residuals using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,​22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,​85
Sunday, June 2, 2013 at 2:24pm

Statistics
In the library on a university campus, there is a sign in the elevator that indicates a limit of 16 people. in addition there is a weight limit of 2500 lbs. assume that the average weight of students, faculty, and staff on campus is 150 lbs, that the standard deviation is 27 ...
Sunday, June 2, 2013 at 2:22pm

statistics
suppse you received a shipment of nine televisions. four of the television are defective. If two televisions are random;y selected compute the probability at least on of the two televisions does not work
Sunday, June 2, 2013 at 9:40am

statistics
Give examples of nominal, ordinal, interval. and ratio data. Then, convert your ratio data example into interval, ordinal, and nominal scales. Measurement Scales Practice 1. Indicate the first letter (N, O, I, R) of the highest possible scale for each of the following measures...
Sunday, June 2, 2013 at 9:02am

Statistics
(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq &...
Saturday, June 1, 2013 at 8:54pm

Statistics
Step 2 - Transform the sample mean into a z-score (p. 133) x̅ = 26, N = 30, σ_X=6 Z = (X- µ)/(σ_X/√N) = (24- 26)/(6/5.4772) = (-2)/(1.0955) = 1.8257 Z = - 1.83 The z-score table notes that the area between the mean of 26 and the z-score of 1.83 = ....
Saturday, June 1, 2013 at 8:52pm

statistics
Measurement Scales Practice 1. Indicate the first letter (N, O, I, R) of the highest possible scale for each of the following measures, where N is lowest and R is highest: Measure Highest Scale a. Feet of snow Interval b. Brands of carbonated soft drinks Nominal c. Class rank ...
Saturday, June 1, 2013 at 8:41pm

Statistics
women's heights are normally distributed with a mean 63.1 in and standard deviation of 2.5. A social organization for tall people has a requirement that women must be at least 69in tall. What percentage of woman meet that requirement? The percentage of woman that are ...
Saturday, June 1, 2013 at 8:19pm

statistics
The diameter of an electric cable is normally distributed, with a mean of 0.7 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.71 inch?
Saturday, June 1, 2013 at 6:38pm

Statistics
The diameter of an electric cable is normally distributed, with a mean of 0.7 inch and a standard deviation of 0.01 inch. What is the probability that the diameter will exceed 0.71 inch?
Saturday, June 1, 2013 at 6:31pm

Statistics
Darned old Foofy! Foofy computes the x̅ (MEAN) from data that her professor says is a random sample from population Q. she correctly computes that this mean has a z-score of +41 on the sampling distribution for population Q. Foofy claims she has proven that this could not...
Saturday, June 1, 2013 at 5:53pm

Statistics normal distribution
54% of the children in a large city are boys. Using a suitable approximation, calculate the probability that a random sample of 1000 children contains more boys than girls ?
Saturday, June 1, 2013 at 5:33pm

statistics
A realty company has 100 homes listed for sale. Some of these homes have fireplaces, some have garages, and some have neither. A breakdown is provided in the two-way classification table below. Fireplace No Fireplace Garage 50 30 No Garage 10 10 what is the probability that ...
Saturday, June 1, 2013 at 2:05pm

statistics
The lifetime of a 2-volt non-rechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than
Friday, May 31, 2013 at 5:29pm

Statistics
You are a real estate agent and you are trying to predict home prices for your clients that want to list their house for sale. You have a very small city without much data. You will need to use the data that you have available for the past year on homes that have been sold. ...
Thursday, May 30, 2013 at 8:44pm

Statistics
Calculate a linear regression, the residuals, and the correlation between two variables using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,​22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,​85
Thursday, May 30, 2013 at 8:12pm

Math
Statistics show that the sales force of Golden Wholesalers successfully closed 1,711 sales out of 1,950 sales calls. What was their percent success rate?
Thursday, May 30, 2013 at 7:27pm

statistics
Estimate the tenure of someone that could have $5.8($k) and 15 years of job satisfaction. Make sure to state your multiple regression equation in your example. What are some of things that you can estimate from the model? How effective is evaluating the R-squared of the model...
Thursday, May 30, 2013 at 2:09am

Math/Statistics
Three hundred twelve viewers were asked if they were satisfied with TV coverage of a recent disaster. Gender Female Male Satisfied 90 53 Not Satisfied 124 45 (a) Find P(satisfied). (Give your answer correct to two decimal places.) (b) Find P(satisfied | female). (Give your ...
Wednesday, May 29, 2013 at 10:46pm

Math/Statistics
A and B are events defined on a sample space, with the given probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A | B) = 0.43 and P(B) = 0.75
Wednesday, May 29, 2013 at 10:44pm

Math/Statistics
Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.32, P(B) = 0.36, P(A | B) = 0.24
Wednesday, May 29, 2013 at 10:43pm

Math/Statistics
Consider the following. P(A) = 0.27 and P(B) = 0.36, A and B are mutually exclusive events (a) Find the probability P(A). (Give your answer correct to two decimal places.) (b) Find the probability P(B). (Give your answer correct to two decimal places.) (c) Find the probability...
Wednesday, May 29, 2013 at 10:41pm

Math/Statistics
Consider the following. P(A) = 0.31 and P(B) = 0.41, and P(A and B) = 0.1271 (a) What is P(A | B)? (Give your answer correct to two decimal places.) (b) What is P(B | A)? (Give your answer correct to two decimal places.) (c) Are A and B independent? yes no cannot be determined
Wednesday, May 29, 2013 at 10:40pm

statistics
Test the following function to determine whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.) R(x) = 0.2, for x = 0, 1, 2, 3, 4 (a) List the distribution of probabilities. R(0) = R(1) = ...
Wednesday, May 29, 2013 at 9:26am

statistics
Assume that you are preparing a report on MM207 statistics students at Kaplan University to present to the Kaplan Board of Trustees. Prepare an appropriate graphical representation for each of the following variables. a) The different majors of students taking MM207. b) The ...
Tuesday, May 28, 2013 at 8:42pm

Math/Statistics
Consider the following. P(A) = 0.31 and P(B) = 0.41, and P(A and B) = 0.1271 (a) What is P(A | B)? (Give your answer correct to two decimal places.) (b) What is P(B | A)? (Give your answer correct to two decimal places.) (c) Are A and B independent? yes no cannot be determined
Tuesday, May 28, 2013 at 4:25pm

Math/Statistics
Consider the following. P(A) = 0.27 and P(B) = 0.36, A and B are mutually exclusive events (a) Find the probability P(A). (Give your answer correct to two decimal places.) (b) Find the probability P(B). (Give your answer correct to two decimal places.) (c) Find the probability...
Tuesday, May 28, 2013 at 4:22pm

Math/Statistics
Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.32, P(B) = 0.36, P(A | B) = 0.24
Tuesday, May 28, 2013 at 4:21pm

statistics
On a national standardized test, with normally distributed results, the middle 68% of students scored between 40 points and 70 points, and the mean score was 55 points. Based on this information, which of the following represents a score in the 97.5th percentile?
Tuesday, May 28, 2013 at 4:20pm

statistics
My mean is 175.5 My standard deviation is=90.57 Sample=25 Formula to be used: P(X>190)=P((X-mean)/s sqrt of my sample is = 5 (Which is the square root of 25.) (190-175.5) / 90.57/5) 14.5/18.114 calculator says 0....
Monday, May 27, 2013 at 8:30pm

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
Monday, May 27, 2013 at 8:16pm

Statistics
Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b) Compute the probability ...
Monday, May 27, 2013 at 7:30pm

Statistics
The number of ships to arrive at a harbor on any given day is a random variable represented by x. The probability distribution of x is as follows. (Give your answers correct to two decimal places.) x 10 11 12 13 14 P(x) 0.37 0.09 0.05 0.14 0.35 (a) Find the mean of the number ...
Monday, May 27, 2013 at 7:29pm

Statistics
The survival rate during a risky operation for patients with no other hope of survival is 87%. What is the probability that exactly four of the next five patients survive this operation? (Give your answer correct to three decimal places.)
Monday, May 27, 2013 at 7:27pm

Statistics
Consider the probability function. (Give your answers exactly.) P(x) = 5 − x 10 , for x = 1, 2, 3, 4 (a) Find the mean. (b) Find the standard deviation.
Monday, May 27, 2013 at 7:11pm

Statistics
Test the following function to determine whether it is a probability function. If it is not, then make it into a probability function. (Give your answers correct to one decimal place.) R(x) = 0.2, for x = 0, 1, 2, 3, 4 (a) List the distribution of probabilities. R(0) = R(1) = ...
Monday, May 27, 2013 at 7:10pm

Statistics
Suppose a box of marbles contains equal numbers of red marbles and yellow marbles but twice as many green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilities to the elements in the sample space. (Give your answers as fractions.) Red...
Monday, May 27, 2013 at 10:14am

Statistics
Consider the following. (a) What percentage of a normal distribution is greater than the mean? (Give your answer correct to the nearest percent.) Incorrect: Your answer is incorrect. . % (b) What percentage is within 1 standard deviation of the mean? (Give your answer correct ...
Monday, May 27, 2013 at 10:13am

Statistics
During the 2011-12 winter season, a homeowner received four deliveries of heating oil, as shown in the following table: Gallons Purchased Price per Gallon ($) 209 2.60 182 2.40 157 2.78 149 2.74 The homeowner claimed that the mean price he paid for oil during the season was (2...
Sunday, May 26, 2013 at 6:36pm

Statistics
. The following data give the 2010 gross domestic product (in billions of dollars) for al 50 states. The data entered in alphabetical order by state (Source: Bureau of Economic Analysis). 173 49 254 103 1901 258 237 62 748 403 67 55 652 276 143 127 163 219 52 295 379 384 270 ...
Sunday, May 26, 2013 at 6:35pm

Statistics
1. The following data give the amount of money (in dollars) that each of six Canadian social service charities spent to raise $100 in donations during 2010. The values, listed in that order, are for the Calgary Inter-Faith Food Bank Society, Covenant House Toronto, The ...
Sunday, May 26, 2013 at 6:34pm

statistics
Consider the following. (a) What percentage of a normal distribution is greater than the mean? (Give your answer correct to the nearest percent.) Incorrect: Your answer is incorrect. . % (b) What percentage is within 1 standard deviation of the mean? (Give your answer correct ...
Sunday, May 26, 2013 at 5:44pm

statistics
a horse race has 10 entries and one person owns 5 of those horses. assuming that there are no ties, what is the probability that those 5 horses finish 1,2,3, 4th and 5th regardless of the order?
Sunday, May 26, 2013 at 5:15pm

Statistics
Scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of 15. The instructor wishes to give a grade of “C” to students scoring between the 60th and 70th percentiles on the exam. What score represents the 60th...
Sunday, May 26, 2013 at 3:34pm

Statistics Please Help
One reason for standardizing random variables is to measure variables with: A. dissimilar means and similar standard deviations in like terms B. different means and standard deviations on a non-standard scale C. similar means and standard deviations on two scales D. different ...
Sunday, May 26, 2013 at 3:33pm

Statistics
Suppose a box of marbles contains equal numbers of red marbles and yellow marbles but twice as many green marbles as red marbles. Draw one marble from the box and observe its color. Assign probabilities to the elements in the sample space. (Give your answers as fractions.) Red...
Sunday, May 26, 2013 at 3:28pm

statistics
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
Sunday, May 26, 2013 at 2:49pm

statistics
A and B are events defined on a sample space, with the following probabilities. Find P(A and B). (Give your answer correct to two decimal places.) P(A) = 0.5 and P(B | A) = 0.4
Sunday, May 26, 2013 at 2:10pm

statistics
Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.35, P(B) = 0.5, and P(A and B) = 0.18
Sunday, May 26, 2013 at 2:08pm

statistics
These data were generated using the equation y = 2x + 1. A scatter diagram of the data results in five points that fall perfectly on a straight line. x 0 1 2 3 4 y 1 3 5 7 9 (a) Find the correlation coefficient.
Sunday, May 26, 2013 at 1:53pm

Statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
Sunday, May 26, 2013 at 12:06pm

statistics
Does studying for an exam pay off? The number of hours studied, x, is compared with the exam grade received, y. x 7 7 5 5 7 y 95 90 75 85 95 (a) Complete the preliminary calculations: SS(x), SS(y), and SS(xy). Incorrect: Your answer is incorrect. . (SS(x)) Incorrect: Your ...
Sunday, May 26, 2013 at 10:58am

statistics
I have got all the other parts but not sure how to come up with this part????In a national survey of 500 business and 500 leisure travelers, each was asked where they would most like "more space." ----------------------------------------​...
Sunday, May 26, 2013 at 10:54am

Statistics
The accompanying data show the number of hours, x, studied for an exam and the grade received, y (y is measured in tens; that is, y = 8 means that the grade, rounded to the nearest 10 points, is 80). x 2 3 3 4 5 5 5 6 6 6 7 7 7 7 8 y 5 5 6 5 6 7 8 6 9 8 7 9 10 8 9 Maple ...
Sunday, May 26, 2013 at 10:05am

Statistics
Using advertised prices for used Ford Escorts a linear model for the relationship between a car's age and its price is found. The correlation coefficient is - 0.933 Determine R2 and interpret this statistic. A) R2 = 93.3% which means that 93.3% of the variation in car ...
Sunday, May 26, 2013 at 8:37am

Statistics
Using advertised prices for used Ford Escorts a linear model for the relationship between a car's age and its price is found. The correlation coefficient is - 0.933 Determine R2 and interpret this statistic. A) R2 = 93.3% which means that 93.3% of the variation in car ...
Saturday, May 25, 2013 at 11:22pm

Statistics
The relationship between the number of games won during one season by a minor league baseball team and the average attendance at their home games is analyzed. A regression analysis to predict the average attendance from the number of games won gives the model y-hat = -2600 + ...
Saturday, May 25, 2013 at 11:19pm

statistics
Can someone work this out for me, so I can use as an example to do the other ones. Does it pay to study for an exam? The number of hours studied, x, is compared to the exam grade received, y. x 4 4 6 1 1 y 75 90 95 60 80 (a) Find the equation for the line of best fit. (Give ...
Saturday, May 25, 2013 at 11:10pm

MATH315 Elementry Statistics
A researcher surveyed college students to study their opinion about the proposed change in smoking rules. The researcher asked a group of 30 students: 12 of them supported the change, 13 of them did not, and 5 had no opinion. This is not a binomial model because... A. ...there...
Saturday, May 25, 2013 at 10:27pm

Statistics
Scores on a mathematics examination appear to follow a normal distribution with mean of 65 and standard deviation of 15. The instructor wishes to give a grade of “C” to students scoring between the 60th and 70th percentiles on the exam. What score represents the 60th...
Saturday, May 25, 2013 at 10:23pm

Statistics
X Y 0 23 2 27 2.3 29 4.1 32 5 35 What is the correlation for this data set? 10) Find the regression line for this data set.
Saturday, May 25, 2013 at 3:58pm

Statistics
How do I figure out the answer to this ? It's been a while since I came across one like it; On a test, 6.25% of the questions are answered incorrectly. If 5 questions are answered incorrectly, how many questions are on the test ?
Saturday, May 25, 2013 at 1:04pm

statistics
Help!!I have tried this several times and come up with wrong answer. WHAT PERCENTAGE OF A NORMAL DISTIBUTION IS GREATER THAN THE MEAN? (GIVE ANSWER TO NEAREST PERCENT)THIS ONE I GOT 68% AND IT WRONG... AND WHAT PERCENTAGE IS GREATER THAN A VALUE THAT IS 1 STANDARD DEVIATION ...
Saturday, May 25, 2013 at 1:01pm

Statistics
How do you fine the P-value?
Saturday, May 25, 2013 at 12:01pm

healthcare
Identify and discuss at least 2 specific sources of health care statistics. These sources can be examples of either primary or secondary data sources.
Saturday, May 25, 2013 at 8:29am

statistics
This question was previous answered and when I put the answer in it was wrong. I have tried to work out more like it and if that one is not right, what is wrong with it. A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars...
Friday, May 24, 2013 at 7:06pm

Statistics
Suppose the variable x is the number of minutes walked each week and the variable y is the blood cholesterol level given by the following table: x y 31 290 60 278 90 259 120 238 150 219 Using the regression equation, predict cholesterol levels when walking is 175 minutes per ...
Friday, May 24, 2013 at 6:58pm

statistics
Can someone please tell me how I miss this, I added them up 29 and divided by 8 and came up with 3.625. Below is the question. Please don't send me to other sites and just explain why it is wrong. The number of children, x, belonging to each of eight families registering ...
Friday, May 24, 2013 at 6:38pm

statistics
would someone please work this problem out in steps so I can understand it. book not helping confusing me more. A study was conducted to investigate the relationship between the cost, y (in tens of thousands of dollars), per unit of equipment manufactured and the number of ...
Friday, May 24, 2013 at 10:47am

healthcare
•Identify and discuss at least 2 specific sources of health care statistics
Friday, May 24, 2013 at 7:26am

statistics.urgent please help..
A local college cafeteria has a self-service soft ice-cream machine. The cafeteria provides bowls that can hold up to 16 ounces of ice-cream. The food service manager is interested in comparing the average amount of ice-cream dispensed by male students to the average amount ...
Thursday, May 23, 2013 at 10:32pm

Statistics
The mean and median sales prices of new homes sold in the U.S. in November 2010 were $213,000 and $268,000. Which of these numbers is the mean and which is the median? Explain how you know. I'm assuming the median is $213,000 and the mean is $268,000. However, I'm just...
Wednesday, May 22, 2013 at 11:15pm

Math Models
The scores on a standardized test are normally distributed with the mean of 750 and standard deviation 70. Find the probability that a score is more than 890. This is from my Math Models class. I am not taking Statistics. Please someone show me how to do answer this-I don'...
Wednesday, May 22, 2013 at 2:36am

statistics
a company decides to add a new program that prepares randomly selected sales personnel to increase their number of sales per month. The mean number of sales per month for the overall popualtion of sales people at this national company is 25 with a standard deviation of 4. The ...
Monday, May 20, 2013 at 5:01pm

statistics
A gambling game pays 4 to 1 and the chance of winning is 1 in 6. Suppose you bet $1 on this game 600 times independently.Find the expected number of times you win?
Monday, May 20, 2013 at 4:29am

statistics
Suppose you are trying to estimate the percent of women in a city. Other things being equal, a simple random sample of 0.1% of the population of a city that has 2,000,000 people is ________ as a simple random sample of 0.1% of the population of a city that has 500,000 people. ...
Monday, May 20, 2013 at 3:07am

statistics
Suppose you are trying to estimate the percent of women in a city. Other things being equal, a simple random sample of 0.1% of the population of a city that has 2,000,000 people is ________ as a simple random sample of 0.1% of the population of a city that has 500,000 people. ...
Monday, May 20, 2013 at 3:07am

PSY210 Psychological Statistics
Simply reporting measures of central tendency or measures of variability will not tell the whole story. Using the following information, what else does a psychologist need to know or think about when interpreting this information? A school psychologist decided to separate some...
Monday, May 20, 2013 at 1:50am

statistics
The body temp of normal healthy persons are normally distributed with a mean of 98.2 degrees F and a standard deviation od .62 degree F. If we define a fever to be a body temp above 100 degrees F, what percentage of normal and healthy person would be considered to have a fever?
Sunday, May 19, 2013 at 7:00am

statistics
For certain x and y series which are correlated, the two lines of regression are 5x-6y+9=0 , 15x-8y+130=0. The correlation coefficient is :
Sunday, May 19, 2013 at 4:43am

PSY210 Psychological Statistics
Simply reporting measures of central tendency or measures of variability will not tell the whole story. Using the following information, what else does a psychologist need to know or think about when interpreting this information? A school psychologist decided to separate some...
Sunday, May 19, 2013 at 1:09am

Statistics
A gambling game pays 4 to 1 and the chance of winning is 1 in 6. Suppose you bet $1 on this game 600 times independently. 3A Find the expected number of times you win. 3B Find the SE of the number of times you win. 3C Find the chance that you lose more than $50 (that is, your ...
Saturday, May 18, 2013 at 12:34pm

Statistics
A gambling game pays 4 to 1 and the chance of winning is 1 in 6. Suppose you bet $1 on this game 600 times independently. 3A - Find the expected number of times you win. 3B - Find the SE of the number of times you win. 3C - Find the chance that you lose more than $50 (that is...
Saturday, May 18, 2013 at 10:55am

Statistics
A group of 30 people consists of 15 children, 10 men, and 5 women. Tom and Jerry are two of the men in the group. Five people are picked at random without replacement. 2A - Find the chance the first person picked is a man, given that the fourth and fifth people picked are ...
Saturday, May 18, 2013 at 10:24am

statistics
A die has 2 red faces, 2 blue faces, and 2 green faces. It is rolled 240 times. Let R be the number of times red faces appear, and B the number of times blue faces appear. The random variable R is the sum of 240 draws at random with replacement from [pick all that are correct...
Saturday, May 18, 2013 at 8:36am

statistics
Rank the three events below in increasing order of probability. For example, if you choose “A B C”, you are saying that A has the smallest chance, B has more chance than A but less chance than C, and C has the biggest chance. [If you think ...
Saturday, May 18, 2013 at 5:26am

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