Tuesday

January 17, 2017
**statistics**

A survey of 50 lobster fishermen on Funafuti (an island in Tuvalu), found that they catch an average of 32 pounds of lobster per day with a standard deviation of four pounds. If a fisherman is selected randomly, what is the probability that his catch is less than 20 pounds?

*Thursday, May 12, 2016 by Qwenie*

**Statistics**

If someone will explain how to work these problems out, that'll help me a ton! A weight loss program claims their patients loose an average of 3 pounds during the first month of the program but a consumer group believes the number is higher than that. A random sample of 8 ...

*Tuesday, May 10, 2016 by lviiii*

**Statistics Range, Variance, and Standard Deviation**

26. Flight Data: Find the range, variance, and standard deviation. Express answers using appropriate units, such as "minutes." Refer to Data Set 15 in Appendix B and use the times required to taxi out for takeoff. Flight 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3 3 3 3 3 3 3 3 3 ...

*Tuesday, May 10, 2016 by Alexis*

**Statistics Homework**

Political Contributions: Listed below are contributions (in dollars) made to the two presidential candidates in a recent election. All contributions are from the same zip code as the author, and the data are from the Huffington Post. Do the contributions appear to favor either...

*Tuesday, May 10, 2016 by Alexis*

**Statistics**

Years to Earn Bachelorâ€™s Degree: Listed below are the lengths of time ( in years) it took for a random sample of college students to earn bachelorâ€™s degrees ( based on data from the U. S. National Center for Education Statistics). Based on ...

*Tuesday, May 10, 2016 by Alexis*

**Math statistics**

What is the probability of randomly selecting a female from the 25 and 35 years old

*Monday, May 9, 2016 by Anonymous*

**Statistics**

The mean life expectancy of a certain type of light bulb is 945 hours with a standard deviation of 21 hours. What is the approximate standard deviation of the sampling distribution of the mean for all samples with n=50?

*Monday, May 9, 2016 by tf9346*

**statistics**

A zip-code is a five-digit number identifying where in the U.S. an address is located. The first four digits in a zip code can be any number 0-9, but the fifth digit cannot be 0. In addition to this, each address has a â€œplus-fourâ€; ...

*Sunday, May 8, 2016 by Anonymous*

**Statistics Algebra 2 **

A 10-question multiple choice test has 4 possible answers for each question. A student guesses on all ten answer. a)What is the probability that the student selects at least 6 correct answers? b)Is getting exactly 10 questions correct the same probability as getting exactly ...

*Sunday, May 8, 2016 by Dloc*

**Statistics**

Can someone help/check with these questions. I did majority of the work. but some i need help with. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study (listed below) ...

*Thursday, May 5, 2016 by Davina*

**Statistics **

In a simple random sample of 80 patients that go to a certain dentist, 9 patients had their teeth whitened. which interval is the 95% confidence interval for the percent of all the dentist's patients who had their teeth whitened? (4.4, 18.2) (8.4, 14.2) (5.5, 17.1) (7.8, ...

*Thursday, May 5, 2016 by Clay*

**Statistics**

Can someone help with these questions. I did majority of the work. but some i need help with. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study (listed below) Assume ...

*Thursday, May 5, 2016 by Davina*

**Statistics**

The probability that Samantha will be accepted by the college of her choice and obtain a scholarship is 0.35. If the probability that she is accepted by the college is 0.65, find the probability that she will obtain a scholarship given that she is accepted by the college.

*Wednesday, May 4, 2016 by Maria M.*

**Statistics **

It is claimed that 70% of the cars on the Valley Highway are going faster than 65 miles per hour. A random sample of 12 cars was observed under normal driving conditions with no police car in sight. (A) What is the probability that all of them were going faster than 65 miles ...

*Wednesday, May 4, 2016 by Samantha *

**maths**

The management committee of Oxford school has indicated its desire to accept only 40% of all continuing undergraduate based on the results of the end of second semester examinations.the mean score of the examination is 500 and a standard deviation of 100.find the cut off score...

*Wednesday, May 4, 2016 by Ruby*

**Math**

The following data set is the GPAs of the students in a statistics class. 1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75, 2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69 What percentile is a GPA of 2.34? A. About the 6th B. About the 15th C. About the ...

*Wednesday, May 4, 2016 by angela*

**maths(Please help me out)**

A survey of mobile call interconnectivity indicates that the average time it takes to connect calls from one network to the other is 25 seconds.Assume the variable is approximately normally distributed and the standard deviation is 4.5 seconds.if 80 calls are randomly selected...

*Wednesday, May 4, 2016 by Ruby*

**Statistics**

You buy a lottery ticket to a lottery that cost $10 per ticket. There are only 100 tickets available to be sold in this lottery. In this lottery there are one $500 prize, two $100 prizes, and four $25 prizes. Find your expected gain or loss. Do you still want to play raffle?

*Tuesday, May 3, 2016 by Javier*

**Statistics**

You Buy a lottery ticket to a lottery that cost $10 per ticket. There only 100 tickets available to be sold in the lottery. In this lottery there are one $500 prizes, two $100 prizes and four $25 prices. Find your expected gain or loss. Do you still want to play the raffle?

*Tuesday, May 3, 2016 by Javier*

**Math**

The following data set is the GPAs of the students in a statistics class. 1.93, 1.99, 2.00, 2.04, 2.12, 2.34, 2.55, 2.55, 2.75, 2.75, 2.80, 2.80, 2.85, 3.02, 3.12, 3.22, 3.31, 3.33, 3.45, 3.69 What percentile is a GPA of 2.34? A. About the 6th B. About the 15th C. About the ...

*Tuesday, May 3, 2016 by angela*

**Statistics **

An unprepared student is about to take his first test of the semester. He is told that his test will be composed of 20 multiple choice questions, each with 4 possible answers, only one of which is correct. a.What is the probability that the unprepared student randomly guesses ...

*Tuesday, May 3, 2016 by Sam*

**statistics**

Through a mix-up on the production line, 21 defective ovens were shipped out with 29 good ones. If 8 are selected at random, what is the probability that none of them are defective? need help ASAP

*Tuesday, May 3, 2016 by qwenie*

**Probability and statistics**

From among a group of 2 men, 4 women and 6 children, 2 individuals are selected randomly. What is the probability that exactly 1 among the chosen are children?

*Monday, May 2, 2016 by Jeanny*

**Probability and statistics**

What is the average of all possible five-digit numbers that can be formed by using each of the digits 8, 9, 1, 3 and 6 exactly once? Are you just supposed to try out all the possibilities and count them or is there like a formula or something you can sub numbers into? Thank you

*Monday, May 2, 2016 by Jeanny*

**Statistics**

You conduct a study on eye color and you questioned 550 people a hundred and ten of them have brown eyes and 44% of them have blue eyes what percentage of the people you question has blue or brown eyes

*Friday, April 29, 2016 by Telika*

**Math**

1. In this scenario, identify the population, the sample, and any population parameters or sample statistics that are given. A medical study followed 675 cancer patients who received either the new drug Lafent or a standard chemotherapy drug. 76% of those who receives Lafent ...

*Friday, April 29, 2016 by Devhin Miles PLEASE HELP*

**Statistics**

Can someone explain to me how I got this question wrong? True/False. It is easier to reject the null hypothesis if the researcher uses a smaller alpha(a) level? I said False As alpha decreases, the rejection region also decreases.

*Friday, April 29, 2016 by Davina*

**math libral arts**

1. In this scenario, identify the population, the sample, and any population parameters or sample statistics that are given. A medical study followed 675 cancer patients who received either the new drug Lafent or a standard chemotherapy drug. 76% of those who receives Lafent ...

*Thursday, April 28, 2016 by Casey Vanover*

**statistics**

Suppose you toss a coin 100 times and get 73heads and 27tails.what is the probability that the next flip is head?

*Thursday, April 28, 2016 by adebimpe*

**statistics**

study by a class x= single trout mean is = 10.5 inches standard dev is= 1.4 inches probability a single trout is between 8 and 12 inches? probability that length of 5 trout at random is between 8 and 12 inches? the researchers are 93.8% confident is there enough evident to ...

*Thursday, April 28, 2016 by brittaney*

**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...

*Wednesday, April 27, 2016 by gianna*

**statistics**

A USU Today survey found that of the gun owners surveyed 275 favor stricter gun laws. The survey Involved 500 gun owners. Test the claim that a majority (more than 50%) of gun owners favor stricter gun laws. Use a .05 significance level.

*Wednesday, April 27, 2016 by gianna*

**Statistics **

Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (Â°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (Â°𝐹) 𝑎𝑡 6 𝑝𝑚...

*Tuesday, April 26, 2016 by Nick*

**english**

What does the author achieve by mixing exact and approximate numbers in "A Contribution to Statistics?" can someone explain what they want me to write I'm stuck.

*Tuesday, April 26, 2016 by cassie*

**Healthcare Statistics**

using the following information, determine if the differences between the means are significant medical terminolgy class. Group A = number of word elements remembered by students using flash cards, group B= number of word elements remembered by students not using flash cards. ...

*Monday, April 25, 2016 by Serena*

**Healthcare Statistics**

Given the following p values, which would be considered more significant? p Â¡Ãœ 0.3 p Â¡Ãœ 0.02 p Â¡Ãœ 0.25

*Monday, April 25, 2016 by Serena*

**Statistics**

I'm totally blanking on how to do this type of problem and I want to use the statistic for an essay. I want to say that females are ___% more likely to be cyberbullied than males. Here is the data I have... Females: 41% reported being bullied Males: 32% reported being ...

*Monday, April 25, 2016 by Jamie*

**english**

What does the author achieve by mixing exact and approximate numbers in "A Contribution to Statistics?"

*Monday, April 25, 2016 by cassie*

**statistics**

Individual M&M plain candies have weights that are normally distributed with a mean weight of 0.8565 g and a standard deviation of 0.0518 g. If you randomly select 465 M&M plain candies, what is the probability that their mean weight will be less than 0.8535 g? what is the ...

*Sunday, April 24, 2016 by Nina*

**statistics**

the marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. Given that the pass mark is 20, estimate the number of students who passed the examination.

*Sunday, April 24, 2016 by james*

**statistics**

Four percent of DVD players manufactured by an electronics company are defective. Suppose six DVD players are randomly selected from the production line. Each DVD player is determined to be defective or non-defective. a. What is the probability that none of the DVD players are...

*Sunday, April 24, 2016 by rita*

**Statistics**

For a set of scores with a mean of 111 and a standard deviation of 8, what is the percentile rank of 90? (round to two decimal places, no leading zeros)

*Sunday, April 24, 2016 by Sophia*

**statistics**

A math test consists of 17 multiple choice questions, each with five possible answers (a, b, c, d, e), only one of which is correct. Assume that a student takes the test and randomly answers the questions. What is the probability that the student will get no questions correct?

*Sunday, April 24, 2016 by anon*

**Math: Statistics**

I am trying to report significant data but I'm not sure how to write it out professionally. I did two nominal variables in a chi square test on SPSS. The significance I found is .061 across from "Likelihood Ratio" and under "Asymp sig. 2 Sided". Does ...

*Friday, April 22, 2016 by Shannon*

**Statistics**

which of the following statements are correct? In hypothesis process, you should a)define the statistical hypothesis b)determine the region of acceptance c)calculate the test statistic d) compare the test statistic e)all the above

*Thursday, April 21, 2016 by Botho*

**Statistics**

A coffee-dispensing machine is supposed to deliver 12 ounces of liquid into a large paper cup, but the costumer believes that the actual amount is less. As a test he plans to obtain a sample of 30 cups of the dispensed liquid. The mean of his sample is 11.5 ounces. The machine...

*Thursday, April 21, 2016 by Anonymous*

**Statistics**

A test has a mean of 150 and a student performed 1 standard deviation above the mean. What score did the student have on the test?

*Wednesday, April 20, 2016 by Anonymous*

**Statistics**

A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 14 hours, with a standard deviation of 2.0 hours. It is desired to estimate the mean viewing time within 30 minutes. ...

*Wednesday, April 20, 2016 by Genny*

**Statistics**

In a certain Math class, the probabilities have been empirically determined for various numbers of absentees on any given day. These values are shown in the table below. Find the expected number of absentees in a given day. Number of absentees, x 0 1 2 3 4 Probability, P(x) 0....

*Wednesday, April 20, 2016 by Joan*

**Statistics**

. Two cards are drawn at random, without replacement, from a standard 52-card deck. Find the probability that: (a) both cards are the same color (b) the first card is a face card and the second card is black

*Wednesday, April 20, 2016 by Joan*

**Statistics **

a rifleman averages 8 hits out of 10 shots at a tare what is the probability that he will hit the target 3 out of 4 shots 4c3*(.8)*(.2)

*Tuesday, April 19, 2016 by Patty*

**Elementary Statistics**

SAT math test scores for all students taking the test are approximately normally distributed with mean score of 514 and std. deviation of 118. What is the probability that a randomly chosen student will earn a score above 600 on their SAT math test? There's 19 students, ...

*Saturday, April 16, 2016 by Leah*

**statistics**

Find the probability that in a family of 4 children there will be (a) at least 1 boy (b) at least 1 girl and 1 boy. Assume that the probability of a male birth is 1/2.

*Friday, April 15, 2016 by Haladu Ibrahim*

**Statistics **

Can you create a anova chart on calories of 4 different brands of 7 different favor of theses 4 brands

*Thursday, April 14, 2016 by Anonymous*

**Statistics**

The father of a junior high school student wants to determine the most popular book among junior high students. Select the sample with the least potential bias. A. A randomly selected group of 10 book sellers B. A randomly selected group of 30 junior high students C. A ...

*Wednesday, April 13, 2016 by Angela*

**Statistics**

Which is the best fertilizer for Mr. Jimenezâ€™ backyard grass? Select the type of study most appropriate to the question. A. Experimental B. Experimental blinded C. Case-controlled observational D. Observational Answer: B

*Wednesday, April 13, 2016 by Angela*

**Statistics**

A U.S. government report stated that, â€œWith bank interest rates around 1.0%, 8% of wage earners believe it worthwhile to keep money in a savings account. However, at 3.0% interest, 36% of wage earners believe it worthwhile to keep money in a savings account. ...

*Wednesday, April 13, 2016 by Angela*

**Statistics**

A botany student counted 11 blades of grass in one square centimeter of lawn and measured the lawn as a rectangle 61 m by 31 m. She reported that there were 208,010,000 blades of grass in the lawn. The precision of her conclusion: A. correctly represents her measurements. B. ...

*Wednesday, April 13, 2016 by Angela*

**Statistics**

The results of a poll are stated as follows: â€œBased on a survey of 156 randomly selected students, 90% of the student body of 2870 students agree that no student should have to take final exams in two consecutive exam periodsâ€. If 2578 ...

*Wednesday, April 13, 2016 by Angela*

**Statistics**

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The ...

*Wednesday, April 13, 2016 by Angela*

**statistics**

please help me on this; In the mass production of bolts it is found that 5% are defective. Bolts are selected at random and put into packets of ten. A packet is selected at random. Find the probability that it contains: A. no defective bolts, B. three defective bolts, and C. ...

*Wednesday, April 13, 2016 by uta*

**Statistics**

Several states, including California, have passed legislation requiring automakers to sell a certain percentage of zero-emissions cars within their borders. One current alternative is battery-powered cars. The major problem with battery-operated cars is the limited time they ...

*Sunday, April 10, 2016 by Eddy*

**statistics**

The probability of an event could be 16/17.

*Sunday, April 10, 2016 by amy*

**Healthcare Statistics**

It takes approximately 15 minutes to code one record. How many personnel hour would be needed to code 1424 discharges for the month.

*Saturday, April 9, 2016 by Linda*

**Statistics**

After one month of operation, the health information services at community Health Center determined that there were two records misfiled out of the 450 active records. What is the filing accuracy rate for this area.

*Saturday, April 9, 2016 by Linda*

**Statistics**

Calculate the number of new shelving units needed for a medical record filing system based on eight shelves per unit at 36 inches per shelf. The average record size equals 0.30 inches, and the center anticipates seeing 4,500 patients the first year.

*Saturday, April 9, 2016 by Linda*

**Statistics**

If your HIM department has 100,000 active medical records and you received 5,352 requests for records within a six-month period, what is the request rate for the past six months.

*Saturday, April 9, 2016 by Linda*

**Statistics**

A web-site asks users to create a 5-symbol PIN code where first and second symbols are any letters from the English alphabet and next 3 symbols are any digits. How many different PIN codes can be created?

*Saturday, April 9, 2016 by HELP Plz!*

**Statistics**

The Acme Candy Company claims that 60% of the jawbreakers it produces weigh more than .4 ounces. Suppose that 800 jawbreakers are selected at random from the production lines. Would it be unusual for this sample of 800 to contain 494 jawbreakers that weigh more than .4 ounces?

*Saturday, April 9, 2016 by Chuck*

** Statistics**

If a normally distributed group of test scores have a mean of 76 and a standard deviation of 10. Find the probability that student will earn a grade between 65 and 85

*Saturday, April 9, 2016 by Joe*

**Statistics **

How to find observed frequenty?

*Saturday, April 9, 2016 by Dhelp*

**statistics help**

the average of USA university vice chancellors are normally distributed with mean 57 and variance 225.if a vice chancellor is chosen at randon what is the probability that his/her age is (a):more than 52years [b):less than 48years (c):between 40 and 64 years #so much

*Friday, April 8, 2016 by luiz*

**statistics **

A committee of 4 person is to be appointed from 7 men and 3 women, what is the probability that the committee contain exactly 2 women. At least one man.

*Friday, April 8, 2016 by Anonymous*

**statistics **

A committee of 4 person is to be appointed from 7 men and 3 women, what is the probability that the committee contain exactly 2 women. At least one man.

*Friday, April 8, 2016 by chioma *

**Statistics**

Roulette wheels in Nevada have 38 pockets. They are all numbered 0, 00, and 1 through 36. Of all 38 pockets, there are 18 red, 18 are black, and 2 are green. Each time the wheel is spun, a ball lands in one of the pockets, and each pocket is equally likely. If you spin the ...

*Thursday, April 7, 2016 by Jennifer *

**Statistics **

Roulette wheels in Nevada have 38 pockets. They are all numbered 0, 00, and 1 through 36. Of all 38 pockets, there are 18 red, 18 are black, and 2 are green. Each time the wheel is spun, a ball lands in one of the pockets, and each pocket is equally likely. If you spin the ...

*Thursday, April 7, 2016 by Jennifer *

**Statistics**

A card is drawn from a well shuffled deck of 52 cards. Find P (drawing an acre or a 9)

*Thursday, April 7, 2016 by J*

**Statistics Math**

There are 3 men sitting in a row facing the same way. Their names are A,B, AND, C. a hat has been placed on their heads without them seeing their own or anyone else's. A can see B and C, B can see only C, C sees none. The game goes as follows: (it can have 1,2,3 quest.) A ...

*Thursday, April 7, 2016 by lola*

**History**

1.How did New England's textile industry affect both children and women? (5 points) ⦁ It allowed them to earn a living wage until the age of 25. ⦁ It gave them opportunities not available on family farms. ⦁ It permitted them to complete their schooling...

*Wednesday, April 6, 2016 by <3*

**Statistics**

θ=0.5 θ=1 θ=2 θ=3 λ = 2 θ = 0.5 μ = 0.5 σ = 0.5 θ=0.5 0 2 1 0.270670566 2 0.036631278 3 0.004957504 4 0.000670925 5 9.07999E-05 draw the graph for θ=1 θ=2 θ=3 The first θ=0.5 graph was drawn for you so follow the...

*Tuesday, April 5, 2016 by Eddy*

**Statistics**

A sign on the petrol pumps of a chain of petrol stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. Assuming this claim is true: (b) What is the probability that at least half of the next 10 cars ...

*Monday, April 4, 2016 by John*

**Business Statistics**

(a) Of the next 10 cars entering a petrol station, what is the probability that exactly three of them should have their oil topped up?

*Monday, April 4, 2016 by John*

**Statistics **

Bookstore has a website for which 90 percent of their book sales are to out of state customers and not subject to the collection of sales tax . The sample proportion of all sales to out of state customers from samples of size 100 will vary in repeated sampling. The sampling ...

*Sunday, April 3, 2016 by Teresa*

**Statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial. n=19, x=15 p=.85, find P(15)

*Saturday, April 2, 2016 by Andrea*

**math**

1.Among 90 pieces of mail delivered to the library of a college,50 are addressed to the faculty of Business Administration and 40 are addressed to the Communication faculty.if two of these pieces of mail are delivered to the Dean's office by mistake,and the selection is ...

*Saturday, April 2, 2016 by Bravo*

**math**

The manager of a retail store knows that 40% of the customers who enter the store will purchase one or more items and 60% will leave without making a purchase.what is the probability that in a sample of 10 customers,five will buy one or more items? Here,the population consists...

*Saturday, April 2, 2016 by Ibrahim*

**statistics**

what is the probability that the random variable has a value between 5.3 and 5.7

*Friday, April 1, 2016 by dianne*

**History**

19.)With over eight million people, New York City is most heavily populated city in the U.S Between 1800 & 1900, the population of New York increased from about 80,000 to over three million people. In the years after the Civil War, the population of New York City tripled. With...

*Wednesday, March 30, 2016 by #FreeGucci*

**statistics**

ATUW Motors is planning to replace the brake pad of its cars with a similar quality brake pads but cheaper. This is part of the company strategy to cut costs but wants to maintain the quality of its cars and parts. The variance of the existing brake pads life time is 29.2 ...

*Wednesday, March 30, 2016 by Anonymous*

**Maths - Statistics**

A large school in the UK offers its pupils the opportunity to learn several non-English languages. It turns out that: â€¢ 55% of pupils in this school choose to learn French; â€¢ of the pupils who learn French, 40% also learn German. (a) For ...

*Tuesday, March 29, 2016 by Jay*

**statistics **

in 2012 it accepted that 41% or less preferred diesel engine needs a high school statistics student studying a randomly selected group of 51 male found that 23 of them prefer diesel-powered vehicle is that student correct and claiming them that males more prefer diesel powered...

*Monday, March 28, 2016 by kait*

**Statistics**

How do I find a P VALUE given the Z statistic using the empirical rule? Doing this by hand

*Monday, March 28, 2016 by Sarah*

**Statistics**

How do I find a p value given the Z statistic using the empirical rule?

*Monday, March 28, 2016 by Sarah*

**statistics**

Data has been collected from a representative of a well-defined population to answer the question: "How much money does the average senior male at Normal Community High School have in his pockets at the end of the school day on Friday?" The next step in the study is ...

*Monday, March 28, 2016 by michelle*

**Statistics**

There's 5 multiple choice questions on a quiz. Four choices to each question. Find the probability that the student gets 3 or more questions right. p(x=3) (.25)^3= 0.015 p(x=4) (.25)^4=3.906 p(x=5) (.25)^5=9.765 Do you add them all together to get the overall probability?

*Sunday, March 27, 2016 by Chris*

**Statistics**

A 10 question test is all multiple choice. Each question has four choices. Determine the mean number of questions answered correctly as well as the standard deviation for the number of correct answers if someone were to guess on all ten questions. So far, I have that the ...

*Sunday, March 27, 2016 by Mona*

**Statistics **

An IQ is measured with scores that range from 0-200. The means is 100, the standard deviation is 15. Suppose you choose an SRS of 9. What is the probability that the sample will have an average IQ between 105 and 115?

*Saturday, March 26, 2016 by Jessie*

**Statistics**

Use the following information to answer the following questions. IQ is measured with scores that range from 0-200. Thea mean is 100 and the standard deviation in the population is 15. What is the probability that a randomly chosen person has an IQ of 115? Suppose you have a ...

*Saturday, March 26, 2016 by Jessie*

**Statistics**

why using the t statistic may be an appropriate alternative to using a z-score

*Saturday, March 26, 2016 by Ninoska*

**statistics**

A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold.

*Friday, March 25, 2016 by farahan*