Saturday
July 2, 2016

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

Statistics
The probability of winning something on a single play at a slot machine is 0.29. After 6 plays on the slot machine, What is the probability of winning at least once? Write only a number as your answer. Round your answer to four decimal places (for example: 0.7319). Do not ...
Thursday, October 1, 2015 by Obi

Statistics
At a local university, when scheduling classes, the probability that there are no evening classes available on a certain day is 0.80. what is that probability that there is at least one evening class available on that day? Write one a number as your answer. Round to two ...
Thursday, October 1, 2015 by Obi

Statistics
A group of freshmen and sophomore students was selected and each was asked whether they were a member of a student club. The following table was constructed: Student Club No Student Club Freshman 4 15 Sophomore 9 7 Find the probability that a randomly selected student form the...
Thursday, October 1, 2015 by Obi

Statistics
Types of bonds are divided into three categories: good risk, medium risk, and poor risk. Assume that of a total of 13,838 bonds, 7,035 are good risk, 1,388 are medium risk, and the rest are poor risk. One bond is chosen risk? Write only a number as your answer. Round to two ...
Thursday, October 1, 2015 by Obi

statistics
if you know the names of the starting batters for a baseball team, what is the probability of randomly selecting a batting order that is used in the beginning of the game
Tuesday, September 29, 2015 by recie yanders

math
Can someone show me how to answer this question? Please? I would really appreciate any help you can give baseball statistics~~ “According to an Associated Press study, the average MLB salary will break the $4 million mark for the first time in 2015, continuing a trend ...
Tuesday, September 29, 2015 by Abby

Statistics (Central Limit Theorem)
Does the central limit theorem apply to non-normally distributed variables? Why?
Tuesday, September 29, 2015 by Zam

math
Can someone show me how to answer this question? Please? I would really appreciate any help you can give baseball statistics~~ “According to an Associated Press study, the average MLB salary will break the $4 million mark for the first time in 2015, continuing a trend ...
Monday, September 28, 2015 by Abby

math
Can someone show me how to answer this question? Please? I would really appreciate any help you can give baseball statistics~~ “According to an Associated Press study, the average MLB salary will break the $4 million mark for the first time in 2015, continuing a trend ...
Monday, September 28, 2015 by Abby

Statistics (Central Limit Theorem)
Does the central limit theorem apply to non-normally distributed variables? Why?
Sunday, September 27, 2015 by Zam

Statistics
The mean salary of 8 employees is $36000 and the median is $32000. This highest-paid employee gets a $2000 raise. What is the new mean salary of the 8 employees? median doesn't change. I just can't figure out the mean. I tried (36000+8000/8) but it wasn't right.
Friday, September 25, 2015 by Anonymous

Statistics
The mean salary of 8 employees is $36000 and the median is $32000. This highest-paid employee gets a $2000 raise. What is the new mean salary of the 8 employees? What is the new median salary of the 8 employees?
Friday, September 25, 2015 by Anonymous

statistics
A study was conducted in which the teachers were asked to rate students for a particular trait on a ten point scale. With the help of data given below find out whether significant difference exists in the rating of the students by the teachers. Teachers Students A B C D E F G ...
Friday, September 25, 2015 by Saju

statistics
With the help of following data, determine both the regression equations Psychology (X): Mean= 30, Standard deviation=1.6 Sociology (Y): Mean= 25, Standard deviation= 1.7 Coefficient of correlation = 0.95
Friday, September 25, 2015 by Saju

statistics
A study was conducted in which the teachers were asked to rate students for a particular trait on a ten point scale. With the help of data given below find out whether significant difference exists in the rating of the students by the teachers.Teachers Students A B C D E F G X...
Friday, September 25, 2015 by Saju

computer programming
Write a C++ pogram for the following Employee Name and 12 months’ salary. Salary starts with $5000 per month and increments every month by 10% of previous month salary. At the end of the year, the employee is paid a 5% bonus on top of the yearly salary. Compute the ...
Tuesday, September 22, 2015 by Gokul

statistics
Pharmaceutical companies advertise for the birth control pill an annual efficacy of 98.6% in preventing pregnancy. However, under typical use the real efficacy is only about 95%. That is, 5% of women taking the pill for a year will experience an unplanned pregnancy that year. ...
Monday, September 21, 2015 by angelica

probability
The National Center for Educational Statistics reported that in 2009 the ACT college placement and admission examination were normally distributed and had a mean of 21.1 and standard deviation of 5.1. A college requires applicants to have an ACT score in the top 20% of all ...
Monday, September 21, 2015 by matt

Business Statistics
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The manufacturer's specifications are that the standard deviations is 100 hours. A random sample of 64 light bulbs indicated a sample mean life of 350 ...
Sunday, September 20, 2015 by Tim

Statistics
b. What is the probability of randomly generating a 7 from the numbers 2 to 12 inclusive?
Sunday, September 20, 2015 by Joe

statistics
suppose that from 8 students, we want to take a committee of students? How many committees of 3 can be selected? How many of 4?
Sunday, September 20, 2015 by Danielle

statistics
what is mock data? And how does it work or what do you do??
Saturday, September 19, 2015 by Anoymous

STATISTICS
Births are approximately uniformly distributed between the 52 weeks of the year. They can be said to follow a uniform distribution from one to 53 (spread of 52 weeks). a. X~ b. Graph the probability distribution. c. f(x)= d. u= e. o= f. Find the probability that a person is ...
Saturday, September 19, 2015 by BORNIUCS

statistics
The cholesterol levels of adult American women has a mound-shaped and symmetric distribution with a mean of 188mg/dL and a standard deviation of 24 mg/dL. In what interval would you expect most American women’s cholesterol levels to be? Explain.
Saturday, September 19, 2015 by katie

Statistics
. Wildlife biologists inspect 153 deer taken by hunters and find 32 of them carrying ticks that test positive for Lyme disease. a) Construct and interpret a 90% confidence interval for the percentage of deer that may carry such ticks. Show all work and formulas. b) If the ...
Wednesday, September 16, 2015 by Cutie patootie

Business statistics
The lifetimes of Triple X TV Tubes are approximately normally distributed with mean 13.2 years and standard deviation 3.5 years. Consider the distribution of sample means for all samples of 100 Triple X TV tubes. Part A What is the standard error, to two decimal places, of the...
Wednesday, September 16, 2015 by Portia

Statistics
Using the empirical rule, 95% of female heights should be between what two values? Either show work or explain how your answer was calculated
Monday, September 14, 2015 by Anonymous

STATISTICS
On average, eight teens in the U.S. die from motor vehicle injuries per day. What is the probability that no teens will die on any given day?
Monday, September 14, 2015 by BONOCARIS

statistics
what does this mean i have to do this in a spreadsheet Descriptive stats for each numeric variable
Sunday, September 13, 2015 by Anoymous

statistics
this is what we are supposed to do to began this paper Create a Microsoft® Excel® spreadsheet with the two variables from your learning team's data set. I understand the spreadsheet I think the variables are employee satisfaction, hours worked per week, and ...
Sunday, September 13, 2015 by Anoymous

Statistics/probability
You are considering two mutual funds for your investment. The possible returns for the funds are dependent on the state of the economy and are given in the accompanying table. State of the Economy Fund A Fund B Good 20% 40% Fair 10% 20% Poor -10% -40% You believe that the ...
Sunday, September 13, 2015 by Eric

statistics
I need to figure out the variables one independent and the other dependent from the data set. I forgot what a data set is and what the variables are I have the paper I m supposed to be looking on for it but have no idea what i m looking for.
Saturday, September 12, 2015 by Anoymous

Statistics
The distribution of heights of women aged 20 to 29 is approximately normal with a mean of 2.8 inches and standard deviation of 2.8 inches. The height (+/- 0.1 inch) of the middle 99.7% falls between a low of ?? inches and a high of ?? inches. Please help on how I set this up ...
Thursday, September 10, 2015 by Angel

statistics
A multiple-choice quiz has 15 questions, each with 4 possible answers of which only 1 is the correct answer. What is the probability that a student gets 7 to 11 correct answer?
Thursday, September 10, 2015 by jean

statistics
A study was conducted in which the teachers were asked to rate students for a particular trait on a ten point scale. With the help of data given below. Find out whether significant difference exist in the rating of the student by the teacher. A B C D E F G X 7 3 7 1 5 5 5 Y 5 ...
Wednesday, September 9, 2015 by Anonymous

statistics
A study was conducted in which the teachers were asked to rate students for a particular trait on a ten point scale. With the help of data given below. Find out whether significant difference exist in the rating of the student by the teacher. A B C D E F G X 7 3 7 1 5 5 5 Y 5 ...
Wednesday, September 9, 2015 by Anonymous

statistics
I have this question which is stumping me and my lecture is little help. For part we have to find the standard error and I have that, well I think I do, and part b and c depend on us getting part a right. Can someone please help me out. The sign on the lift in a building ...
Wednesday, September 9, 2015 by Luci

Statistics
If 50 classes of 20 students are randomly selected, what is the probability that 10 classes have no left handed students? I know it is binomial distribution but i do not get it
Tuesday, September 8, 2015 by Joshua

AP Statistics
The severity of side effects experienced by patients while being treated with a particular medicine is under study. The severity is measured on the scale: none, mild, moderate, severe, very severe. a. Name the variable of interest. b. Identify the type of variable. I answered ...
Tuesday, September 8, 2015 by Anon

Statistics Please Help
Hi Ms. Sue I was wondering if you could give me some advise in doing explain and unexplain variation and least-squares regression line. I know how to compute the numbers, but I am having a problem with: say there is 3.0270, 30.0463 and 33.1120. I sometimes get it right and ...
Tuesday, September 8, 2015 by Mary Ann

statistics
I have this question which is stumping me and my lecture is little help. For part we have to find the standard error and I have that, well I think I do, and part b and c depend on us getting part a right. Can someone please help me out. The sign on the lift in a building ...
Tuesday, September 8, 2015 by Luci

Statistics
Assume that the unit of measure for each of the values in the sample is in dollars. What would be the units of measure for the sample: a) mean? b) range? C) Variance? d) Standard deviation?
Tuesday, September 8, 2015 by Matt

statistics
An online site presented this​ question, 'Would the recent norovirus outbreak deter you from taking a​ cruise?' Among the 34 comma 203 people who​ responded, 66% answered​ 'yes'. Use the sample data to construct a 90​% confidence ...
Monday, September 7, 2015 by Roberts

statistics
need to explain how i obtain the sample size which is 370 here's the rest of the information i don't know how to writ this out? calculate the sample size using 95% CI and 5% margin of error i got sample size 370 but how do i write this out
Monday, September 7, 2015 by Anoymous

statistics
I need help with this I already did it on a calculator but now I don't know how to write the formula out on paper like n= for the population and * this or that I m not sure how to write it out help please how do i write this into a formula confide level 95% margin of error...
Monday, September 7, 2015 by Anoymous

statistics
how do i write this into a formula confide level 95% margin of error 5% population 10,000 sample size 370 like n= and so on i m not sure how to do that
Monday, September 7, 2015 by Anoymous

statistics
According to a certain country's department of education 39.6% of 3-year olds are enrolled in day care. What is the probability that a randomly selected 3-year old is enrolled in day care?
Monday, September 7, 2015 by john

Statistics
A regional manager visits local fast food franchises and evaluates the speed of the service. if the manager receives her meal within 45 seconds, the server is given a free movie-admission coupon. If it takes more than 45 seconds, the server receives nothing. Throughout the ...
Monday, September 7, 2015 by Bea

Statistics (Percentile, Decile, Quartile)
Please refer to the following table: Number of Cellular Phones​  in Household: DECILE 1 - 1.00 2 - 1.00 3 - 1.00 4 - 1.00 5 - 2.00 6 - 2.00 7 - 3.00 8 - 3.00 9 - 4.00 (a) How many cellular phones&​nbsp;does a ...
Sunday, September 6, 2015 by Zam

Statistics
In country A, the In​dex of Qualitative Variat​ion (IQV)for an exhuastiv​e survey of religious&nbs​p;beliefs is 0.25.  For country B, the I​QV ...
Sunday, September 6, 2015 by Zam

Statistics
A list of transactions contains 100 numbers: 60 gains and 40 losses. The gains are positive numbers and the the losses are negative numbers. The units are thousands of dollars. For the 60 gains, the average is 18 and the SD is 7.5. For the losses the average is -20 and the SD...
Thursday, September 3, 2015 by Sarah

statistics
N(0,7.6) Find the proportion of observations that are between -10 and 10. please show your steps
Wednesday, September 2, 2015 by Light yagami

Statistics
In advance of the 1936 Presidential Elections, a magazine titled Literary Digest released the results of an opinion poll predicting that the republican candidate Alf Landon would win by a large margin. The magazine send post cards to approximately 10,000,000 prospective voters...
Friday, August 28, 2015 by Ashley

statistics
p=0.50 the 90% confidence interval for p is?
Wednesday, August 26, 2015 by Anoymous

statistics
a golf ball is selected at random from a golf bag. If the golf bag contains 4 brown balls, 9 yellow balls, and 12 orange balls, find the probability of the following event. probability the ball is brown or yellow?
Tuesday, August 25, 2015 by david

statistics
the mean gas mileage for a hybrid car is 56 miles per gallon suppose that the gasoline mileage is approximately normally distributed of 3.2 miles per gallon what is the probability that a randomly selected hybrid gets more than 62 miles per gallon.
Saturday, August 22, 2015 by Anoymous

STATISTICS
The Erie Run Outlet mall has two NIKE stores, one is on Liberty street and the other on Barnes St. Two stores laid of differently, both owners claim their stores maximizes the amounts customers will impulse purchase. A sample of 10 customers at the Liberty st store revealed ...
Thursday, August 20, 2015 by August

Statistics
Two Boats the Picadilly and the Orange are competing for a spot in the Cup races. They race over a part of the course SEVERAL TIMES. The sample times in minutes for the Picadilly are 12.9, 12.5, 11.0, 13.3, 11.2, 11.4, 11.6, 12.3, 14.2, and 11.3. The sample times for the ...
Thursday, August 20, 2015 by August

statistics
The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees by employee job title. There were three job categories: clerical, custodial, and managerial. The study collected current salary data of the three groups ...
Wednesday, August 19, 2015 by elizabeth

Linear Systems and Statistics
A camera store sells 40 pairs of binoculars per week on average with a standard deviation of 6. What is the probability that the store will sell more than 52 pairs binoculars in any week? 8.28% 3.57% 7.24% 2.28% 4.55%
Wednesday, August 19, 2015 by Anonymous

Statistics
The following contingency of frequencies is based on a 5-year study of fire fatalities in Maryland. For purposes of clarity, columns and rows are identified by the letters A-C and D-G, respectively. Blood Alcohol Level of Victim A B C Age 0.00% 0.01-0.09% ¡Ý0.10% ...
Monday, August 17, 2015 by Bea

statistics
4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch, darkening in the ...
Friday, August 14, 2015 by Martin

statistics
Construct a scatterplot. b. Draw a regression line through the data point that “fits” the data points reasonably well. c. Enclose the data points with a ellipse. d. Estimate the direction of the correlation. e. Estimate the strength of the correlation coefficient. 5...
Friday, August 14, 2015 by shiela

Statistics/Binomal
I really need help I do not understand how to start this problem. A machine that manufactures automobile parts produces defective parts 15% of the time. If 7 parts produced by this machine are randomly selected, what is the probability that at least 3 of the parts are ...
Friday, August 14, 2015 by Mary Ann

STATISTICS
According to the DPT of Health Services , 12% of 30-39 have depression. Suppose 3 30-39 year olds are selected randomly what is the probability that all three will have depression.
Thursday, August 13, 2015 by Sean

statistics
Consider the events of drawing an ace, then draw another ace, followed by a queen, one at a time without replacement (from a standard deck of cards). What is the probability of drawing an ace, then another ace, then a queen? please show explanation
Wednesday, August 12, 2015 by CJ

Statistics Please Help
determine the value of C P(-c<z<c)= 0.9736 the two marks that are < have a line under them. Can someone show me how to do this problem. Thank you
Monday, August 10, 2015 by Mary Ann

statistics and probability
Solve for y . -2(y-3)= 5y-29 Simplify your answer as much as possible
Monday, August 10, 2015 by mary

Statistics
Suppose a multiple-choice test has 10 questions each with 5 choices. If a student guesses randomly. What is the probability that they get an B or better. ( they get at least a 80% on the exam) make sure to declare a binomial random variable and show all work
Wednesday, August 5, 2015 by John

Statistics
The research hypothesis is a vitally important element of any quantitative research study. This Discussion provides an opportunity for you to develop your own testable hypothesis based on the data set for the Final Project. To prepare for this Discussion, review this week’...
Wednesday, August 5, 2015 by Yabby

Probability/Statistics
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario...
Saturday, August 1, 2015 by Spencer

Statistics
5. For the data presented below, answer the questions that follow. Score on political Score on current Individual awareness test events test 1 24 23 2 16 12 3 11 11 4 9 6 5 8 13 6 14 11 7 17 16 8 19 16 9 21 21 10 25 25 11 18 11 12 13 13 13 11 14 14 6 10 15 9 10 16 12 7 a. ...
Saturday, August 1, 2015 by Samantha

Statistics
4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch, darkening in the ...
Saturday, August 1, 2015 by Samantha

Statistics
uppose that a category of world class runners are known to run a marathon (26 miles) in an average of 143 minutes with a standard deviation of 12 minutes. Consider 49 of the races. Let X = the average times of the 49 races. (a) Find the median of the average running times. ( ...
Friday, July 31, 2015 by mathhelpplease

Statistics
A sample survey interviews an SRS of 115 college women. Suppose that 68% of all college women have been on a diet within the last 12 months. What is the probability that 76% or more of the women in the sample have been on a diet?
Friday, July 31, 2015 by mathhelpplease

Statistics
What is best to measure voltage in? Mean, Median, Mode, Range?
Thursday, July 30, 2015 by Seany

Statistics
Given a histogram. How would I find out how far the mean was from the median?
Thursday, July 30, 2015 by Seany

Statistics
About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent means with p<.05?
Monday, July 27, 2015 by Maria

Statistics
The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz cups. When 15 cups were selected at random, they were found to have a mean of 11.7 ounces with a standard deviation of 0.5 ounces. At the .01 significance level, test the claim...
Monday, July 27, 2015 by Sabrina

statistics
A lottery offers one $10000 prize, one $5000 prize and five $1000 prizes. 1000 tickets are sold at $30 each . Find the expectation if a person buys one ticket workings: 9970/1000+4970/1000+4850/1000-29790/1000​ = -10000/1000 =-$10
Sunday, July 26, 2015 by Anonymous

Object Oriented Analysis and Design
3. As the head of information system, you are tasked with developing a new Client Technology Tracking System (CTTS). Coastline Systems Consulting is a provider of managed computer networks and web services located in Destin, Florida. The staff of seven IT technicians, web ...
Saturday, July 25, 2015 by harikumar rajandran

statistics
Of the Statistics graduates of a University 30%, received a starting salary of $45,000.00. If 5 of them are randomly selected, find the probability that all the graduated had starting salary of $45,000.00.
Thursday, July 23, 2015 by Anonymous

Statistics
The music industry must adjust to the growing practice o consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to determine...
Wednesday, July 22, 2015 by Lizzy

Statistics
A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true population of all voters in the state who favor approval.
Wednesday, July 22, 2015 by Lizzy

Statistics
The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set hose limits, the mean weight of quarters in circulation must be estimated...
Wednesday, July 22, 2015 by Lizzy

statistics
An online site presented this question, 'Would the recent norovirus outbreak deter you from taking a cruise?' Among 34,020 people who responded, 64% answered 'yes'. Use the sample data to construct a 90% confidence interval estimate for the proportion of
Wednesday, July 22, 2015 by jeedo

statistics
An online site presented this question, 'Would the recent norovirus outbreak deter you from taking a cruise?' Among 34,327 people who responded, 64% answered 'yes'. Use the sample data to construct a 90% confidence interval estimate for the proportion of the ...
Wednesday, July 22, 2015 by jeedo

Statistics
a seed company advertises that, if its seeds are properly planted, 95% of them will germinate. What is the probability that, when 20 seeds are properly planted, at least 15 will germinate - pM( 19/20)? pq(1/20)? 20c15 20c16 all the way up to 20C10? Don't know if I am ...
Tuesday, July 21, 2015 by Linda

Statistics
A survey of 925 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 90% confidence interval for the true proportion of all voters in the state who favor approval.
Monday, July 20, 2015 by Anonymous

Statistics
The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a. List the different possible samples, and find the mean of each of them. b. ...
Monday, July 20, 2015 by Elizabeth

Statistics
A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Cavalier shows that the mean is 4.5 hours and the standard deviation is .6 hours. If 42 mechanics are randomly selected, find the probability that their mean rebuild time is less than 3.5 ...
Monday, July 20, 2015 by Elizabeth

Statistics
The music industry must adjust to the growing practice of consumers downloading songs instead of buying CDs. It therefore becomes important to estimate the proportion of songs that are currently downloaded. How many randomly selected song purchases must be surveyed to ...
Monday, July 20, 2015 by Elizabeth

Statistics
75 packages are randomly selected from packages received by a parcel service. The sample has a mean weight of 10.2 pounds and a standard deviation of 2.9 pounds. What is the 95% confidence interval for the true mean weight of all packages by the parcel service?
Monday, July 20, 2015 by Elizabeth

Statistics
The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set those limits, the mean wight of quarters in circulation must be estimated...
Monday, July 20, 2015 by Elizabeth

Statistics
A sample of 106 body temperatures resulted in a mean of 98.2 degrees and a standard deviation of .62 degrees. Use these sample statistics to construct a 98% confidence interval estimate of the standard deviation of body temperature of all healthy humans.
Monday, July 20, 2015 by Elizabeth

Elementary statistics
Scores on an English test are normally distributed with a mean of 78% and a standard deviation of 4.5%. Find the value of the first quartile.
Monday, July 20, 2015 by Lizzy

Elementary Statistics
The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.39 inches and a standard deviation of 0.04 inches. If 500 pencils are selected how many would you expect to have a diameter more than 0.33 inches?
Monday, July 20, 2015 by Lizzy

statistics in math
what is an confidence interval?
Monday, July 20, 2015 by Annie George

Probability/Statistics
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario...
Monday, July 20, 2015 by Spencer

Probability and statistics
The hydrocarbon emissions at idling speed in parts of million (ppm) for automobiles of 1980 and 1990 model years are given for 20 randomly selected cars. 1980 models: 141 359 247 940 882 494 306 210 105 880 200 223 188 940 241 190 300 435 241 380. 1990 models: 140 160 20 20 ...
Monday, July 20, 2015 by Anna

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Homework Help: Math