Wednesday

February 22, 2017
**Statistics**

Find the minimum sample size n needed to estimate u for the given values of c, s, & E. c=0.98, s=6.5, & E=1.?

*Friday, October 7, 2016 by Makaila*

**Statistics**

It is not surprising that babies with low birth weights are at risk for developmental difficulties, but extraoridinarily large babies also face a higher than noraml risk of medical problems. In the United States the average full term single birth baby has a weight of 3.4 kg ...

*Friday, October 7, 2016 by Kelsi*

**Statistics**

Let's say that your average monthly charge is normally distributed with a mean of $500 and a standard deviation of $100. The credit card company will call anytime your purchases for the month exceed the 99th percentile. What is the dollar amount beyond which you will get a ...

*Thursday, October 6, 2016 by Stacy*

**Statistics**

If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 2 of her next 9 shots?

*Wednesday, October 5, 2016 by Hannah Jorgensen*

**Statistics**

If a basketball player has a shooting percentage of 60% , find the probability that the player will make at least 4 of her next 6 shots?

*Wednesday, October 5, 2016 by Hannah Jorgensen*

**damon-steve- help statistics**

Statistics City XYZ has 8800 registered voters. There are two candidates: Peter and Paul. A poll of 600 randomly selected registered voters was conducted. We know that 331 said they'd vote for Peter and 251 said they'd vote for Paul. We also know that 18 were undecided. Give ...

*Tuesday, October 4, 2016 by sam*

**Statistics**

Consider the following frequency distribution of daily sales for a shop that was kept for the months of November and December in 2013. Daily Sales ($) 60-70 70-80 80-90 90-100 100-110 110-120 Number of days 5 11 22 13 7 3 a. From this frequency distribution, (i) draw a ...

*Saturday, October 1, 2016 by Nathan*

**Statistics**

Bill,mary,and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible? How many of these committees will contain Bill,Mary, and Joe at the same time?

*Thursday, September 29, 2016 by Charles*

**Statistics**

Bill, Mary, and Joe belong to a club of nineteen people. A committee of twelve is to be selected at random from the membership. How many different arrangements are possible. How many of these committees will contain Bill, Mary and Joe at the same time?

*Thursday, September 29, 2016 by Charles*

**Statistics**

Two committees, one with six and one with seven people, are to be selected from a group of eighteen people, with no one person serving on both committees at the same time. In how many ways can this be done?

*Thursday, September 29, 2016 by Charles*

**Statistics**

True or False? If a correlation is negative, then as it becomes even more negative, r2 increases.

*Thursday, September 29, 2016 by Christopher*

**statistics**

An architect estimates that the average height of the buildings of 30 or more stories in Suva is at least 500 feet. A random sample of 12 buildings is selected, and the heights in feet are shown. At = 0.025, is there enough evidence to reject the claim? 634 385 411 ...

*Thursday, September 29, 2016 by talei*

**Statistics**

23 children born. What is the probability that 22 are boys & 1 is a girl?

*Wednesday, September 28, 2016 by Kevin*

**Math**

Your statistics instructor administers a test having five multiple-choice items with four options each. List the ways in which one can guess correctly on exactly four items on this test. Are there 24 ways, because: 4! (4)(3)(2)(1) =24?

*Wednesday, September 28, 2016 by Debbie*

**Statistics**

Obtain the area under the standard normal curve to the right of z=1.32 Round your answer to four decimal places. A = the tolerance is +/-5%

*Wednesday, September 28, 2016 by Maryan*

**Language Arts**

How does the writer support the statement that dental floss promotes good dental health? With personal opinions with opinions from experts with facts that and statistics with sales information

*Wednesday, September 28, 2016 by Anonymous*

**Statistics**

How can i show that event A and B are neither mutually exclusive nor independent. And what does it mean.

*Wednesday, September 28, 2016 by Judge*

**Statistics**

The events A and B are such that P(A\B)=0.4, P(B\A)=0.25 and P(A n B)=0.12 compute the following; 1. P(A) and p(B) 2. P(A n B') and P(A' n B) 3.P(A u B)and P[(A u B)']

*Wednesday, September 28, 2016 by Mina*

**statistics**

Two dice are rolled, find the probability that the sum is less than 6 (Leave your answer as a number between 0 and 1. Round to 4 decimal places).

*Wednesday, September 28, 2016 by Tim*

**Statistics**

Your statistics instructor administers a test having five multiple-choice items with four options each. List the ways in which one can guess correctly on exactly four items on this test. Are there 24 ways, because: 4! (4)(3)(2)(1) =24?

*Tuesday, September 27, 2016 by Debbie*

**statistics**

Consider the following data on lengths of 30 pieces of metal. 18 26 15 17 7 27 24 17 10 17 23 29 28 18 10 23 16 6 12 26 5 12 23 22 24 14 16 26 19 22 a. Define an outlier. Give an example of an outlier from the above data set. [3] b. (i) Calculate and interpret the: range, mean...

*Tuesday, September 27, 2016 by TINASHE*

**Statistics**

The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $12. Calculate the z score for each scenario. What percentage of her phone bills are above 79? What percentage of her phone bills are between $31 and $79. What would ...

*Sunday, September 25, 2016 by Amy Penn*

**statistics**

x is normally distributed and that sample of 20 yields a mean of 42 and a variance of 25 test the hypothesis that the population standard deviation is 8 at 5% significance level.

*Sunday, September 25, 2016 by Sasanka*

**Stats, Statistics, Math**

A Statistics professor assigned 10 quizzes over the course of the semester. He wanted to see if there was a relationship between the total mark of all 10 quizzes and the final exam mark. There were 229 students who completed all the quizzes and wrote the final exam. The ...

*Saturday, September 24, 2016 by Papi*

**Statistics**

Direct mail advertisers send solicitations ("junk mail") to thousands of potential customers in the hope that some will buy the company's product. The response rate is usually quite low. Suppose a company wants to test the response to a new flyer and sends it to ...

*Thursday, September 22, 2016 by Iresse*

**Statistics**

Direct mail advertisers send solicitations ("junk mail") to thousands of potential customers in the hope that some will buy the company's product. The response rate is usually quite low. Suppose a company wants to test the response to a new flyer and sends it to ...

*Thursday, September 22, 2016 by Iresse*

**Statistics**

Consider the following data set: 3, 4, 6, 7, 9, 9, 11. Identify a number you could add to the set to keep the mean equal to the median. Please help me out. I have no idea how to find this and my lesson doesn't explain how to do it either. I already know that the mean and ...

*Thursday, September 22, 2016 by Me*

**Statistics**

The weight of 100 females aged 15 to 20 years has a mean of 120 pounds and a variance of 36 pounds. How many of the students has a weight less than 110 pounds?

*Thursday, September 22, 2016 by Chyrie lhu*

**statistics**

A test consists of 5 multiple questions each of which 3 answers are given, only 1 of which is correct.for each correct answer a candidate gets 2 marks but loses 1 mark for each incorrect answer.draw up table to show all possible marks and a probability associated with each ...

*Thursday, September 22, 2016 by faith*

**statistics**

Assume the lifespan of light bulbs manufactured by Bright Inc. can be modeled with a normal distribution with a mean of 300 days and a standard deviation of 40 days. 70% of light bulbs produced by Bright Inc. survive longer than how many days?

*Wednesday, September 21, 2016 by Saralynn Niealsen*

**Statistics**

In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together? The answer I got by adding the two means and dividing them by 2 is 171 but it is wrong, it must be 169.9, how can I ...

*Tuesday, September 20, 2016 by W*

**college- practical statistics**

Five coins are tossed 3200 times find the frequencies of distribution of heads & tails & tabulate the results. Calculate the mean number of success & the standard deviation.

*Monday, September 19, 2016 by sathya*

**Statistics**

From a sample with n equals=24, the mean number of televisions per household is 3 with a standard deviation of 1 television. Using Chebychev's Theorem, determine at least how many of the households have between 1 and 5 televisions.

*Sunday, September 18, 2016 by Addison*

**statistics**

A population of N = 10 scores has a mean of μ = 24. If one person with a score of X = 42 is removed from the population, what will be the value for the new mean?

*Friday, September 16, 2016 by patrick*

**statistics**

In general, increasing the sample size (for example, from n = 4 to n = 50) will ____ the risk of a Type I error. (Assume alpha is held constant at .05.) Select one: a. decrease b. increase c. have no influence on

*Friday, September 16, 2016 by anna*

**stats**

The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient of variation equals: a.0.1125% b.11.25% c.203.12% d.0.20312% Do I have to find the ...

*Thursday, September 15, 2016 by Ana*

**statistics**

The weekly study times for all students in a school are normally distributed with μ = 18 hours and σ = 6 hours. If 36 students are randomly selected, find the probability that their mean study time is greater than 20 hours. My work: 20-18/(6/√36)=2/(6/6)=2/1=2...

*Thursday, September 15, 2016 by Judy*

**Statistics**

A signal is transmitted over a noisy channel. It is known that the signal will be correctly received with probability 0.797. If 3 copies of the signal are independently sent over this channel, what is the probability that at least one of them is received correctly? My thought ...

*Wednesday, September 14, 2016 by Janea*

**Statistics**

A social worker is involved in a study about family structure. She obtains information regarding the number of children per family for a certain community from the census data. Identify the variable of interest, determine whether it is discrete or continuous and list some ...

*Tuesday, September 13, 2016 by AprylB*

**Statistics**

The Virginia Department of Social Services collected information on 25 Virginia Supplemental Nutrition Assistance Program (SNAP, formerly Food Stamps) beneficiaries and found that their average monthly food expenditure was $160. The average monthly food expenditure for SNAP ...

*Monday, September 12, 2016 by REDGY22*

**Statistics**

Free Throw Freddie is an 80% free throw shooter. At the end of practice he shoots until he makes 10 shots. a) What is the probability that Freddie makes 10 in a row? b) What is the probability that Freddie needs 15 or more attempts? I understand how to do part a), but I'm lost...

*Sunday, September 11, 2016 by Zach*

**Statistics**

I have a bag with 2 different kinds of objects: 11 cubes, 16 spheres. If I randomly pick from the bag 5 of these objects without return any of it, what is the probability of getting at least 1 of each kind?

*Saturday, September 10, 2016 by Nathan*

**statistics**

the response to a question has three alternative a, b, c, a sample of 120 responses provides 60 a, 24 b, 36 c. show the frequency and relative frequency distributions

*Thursday, September 8, 2016 by susu*

**statistics**

A restaurant menu has 5 kinds of soups, ten kinds of main courses, six kinds of desserts, and eight kinds of drinks. If a customer selects one item from each category, how many different outcomes are possible?

*Wednesday, September 7, 2016 by jelai*

**statistics**

Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.

*Monday, September 5, 2016 by Barbara*

**Statistics**

The average score for a business examination comprising 300 students is 54%. If the marks are normally distributed with a standard deviation of 8%, determine the number of students scores above 70%.

*Monday, September 5, 2016 by Dmaster*

**Statistics**

A movie theater has a super ultra combo meal. It includes the option of a large popcorn, a soda, a slice of pizza, and a box of candy. There are 12 types of toppings for the popcorn, including no topping. There are 5 types of toppings for the pizza, including no topping. The ...

*Monday, September 5, 2016 by Nathan*

**Statistics**

In a group of 54 candidates, 16 are female and the remaining are male. If four are to be randomly selected, what is the probability that there will be only female candidates selected?

*Sunday, September 4, 2016 by Jason*

**Statistics**

The probability that a randomly chosen person in Botswana is 65 or older is approximately 0.2. a) What is the probability that, in a randomly selected sample of 6 people, exactly 4 of them are 65 or older. If X IS THE NUMBER of people of age 65 or older in a sample of 6, ...

*Sunday, September 4, 2016 by mbambo*

**Pathway to Statistics**

a. What value of T represents the temperature that is 16°F below zero? b. A student says that T represents only positive numbers and zero, because there is no negative sign. Is the student correct? Explain

*Thursday, September 1, 2016 by Sam*

**Statistics**

How do I answer: A normal distribution has a standard deviation equal to 39. What is the mean of this normal distribution if the probability of scoring above x = 209 is 0.0228

*Thursday, September 1, 2016 by Brian*

**AP statistics**

A group of students were asked to guess the width of the room in feet, measured to the nearest foot (1 meter = 3.28 feet, to 2 decimal places). Construct a back to back stemplot from these two datasets. How will you overcome the problem that different units are used in the two...

*Tuesday, August 30, 2016 by Leah*

**Statistics**

A poll of a random sample of 100 UNAM students revealed that 82 are football fans and 62 are rugby fanatics draw a venn diagram

*Monday, August 29, 2016 by Raphael*

**Statistics**

Of the 40 students in a gym class, 13 played volleyball, 12 ran track (4 of whom did a push up), and the remainder were absent. A.) What proportion of the class ran track? B.) What percentage played volleyball? C.) What percentage of the runners did a push up? D.) What ...

*Thursday, August 25, 2016 by Daisy*

**statistics**

Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances. A researcher has ...

*Tuesday, August 23, 2016 by mina*

**statistics**

a bag contains 4 blue marbles,6 red marbles, 10 yellow marbles and 6 green marbles.What is the probability of not drawing a red marble?

*Tuesday, August 23, 2016 by dennis*

**statistics**

Select the TWO options that are TRUE statements about two-sample t-tests. Select one or more: The same formula is used for the ESE (estimated standard error) in the two-sample t-test with a common variance and the two-sample t-test with unequal variances. A researcher has ...

*Sunday, August 21, 2016 by mina*

**Business statistics**

You chose a simple random sample of 300 guests you develop a 95 percent confidence interval estimate you found the following 325 and 32 determine the standard error of the sampling distribution determine the critical value z from the standard normal table compute the ...

*Sunday, August 14, 2016 by Kim*

**Statistics**

Survey of 115 families chosen at random, having 5 children it was observed that the distribution was as follows The 5 children are girls is 6 There is one boy and four girls is 18 There are two boys and three girls is 35 There are three boys and two girls is 30 There are four ...

*Saturday, August 13, 2016 by Huruva Nomore*

**probability statistics**

how many bridge hands are possible containing 4 spaders, 6 diamonds , 1 club and 2 heart?

*Saturday, August 13, 2016 by jamie*

**probability statistics**

how many numbers between 4000 and 7000 can be choosen using digita 0,1,2,3,4,5,6,7 and 8 if each digit must not be repeated in any numbers?

*Friday, August 12, 2016 by jhenny*

**statistics**

how many arrangements can be made from the word MATHEMATICS when all are taken at a time ?

*Friday, August 12, 2016 by jella*

**math**

Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that they have hypertension was 15%. Suppose that a...

*Thursday, August 11, 2016 by lucia*

**probability statistics**

A jar contains 6 red, 7 white, and 7 blue marbles. If a marble chosen at random. Find the following probabilities? A)P(red) B)P(white) C)P(red or blue) D)P(red and white)

*Wednesday, August 10, 2016 by charles*

**statistics**

i have a little bit of trouble finding the first and second quartile of this data set:78,91,88,83,84. I know my median is 88,but i cannot see a way to find Q1 ad Q3,plz help!!😄

*Monday, August 8, 2016 by Mirandal*

**Applied Stats**

Based on the data collected by the National Centre for health Statistics and made available to the public in the Sample Adult database, it was found that the percentage of adults who have at some point in their life been told that they have hypertension was 24 percent. Suppose...

*Monday, August 8, 2016 by Anonymous*

**statistics**

A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4 and 1 kilograms of ...

*Monday, August 8, 2016 by mary*

**statistics**

a survey conducted by the u.s department of labor found the 48 out of 500 heads of house holds were unemployed compute a 99% confidence interval for the proportion of unemployed heads of households what is the upper and lower limits round the answers to three decimals

*Friday, August 5, 2016 by bernie*

**statistics**

the diameter of red apples of an orchard have a normal distribution with a mean of 3 inches ans standard deviation of 0.5 inches one apple will be randomly chosen. what is the probability of picking an apple with a diameter less than 2.15 inches

*Tuesday, August 2, 2016 by bernie*

**Statistics**

A production line operation is designed to fill cartons with laundry detergent to a mean weight of 32 ounces. A sample of cartons is periodically selected and weighed to determine whether underfilling or overfilling is occurring. If the sample data lead to a conclusion of ...

*Saturday, July 30, 2016 by Gary*

**statistics**

in a certain college 33% of the physics majors belong to ethnic minorities. if 8 students are selected at random from the physics majors what is the probability that more than 5 belong to an ethnic minority

*Saturday, July 30, 2016 by bernie*

**statistics**

i made a typo i meant to say what is the probability that both are obese

*Friday, July 29, 2016 by bernie*

**statistics**

according to the health and exam survey (1999-2008)35.7% of u.s adults were consdered obese(body mass greater then30)if two people in the u.s are selected at random is the probability that both are obese

*Friday, July 29, 2016 by bernie*

**statistics**

twenty light bulbs are tested three light bulbs fail the test. two light bulbs are selected at random without replacement from this collection of bulbs find the probablilty that both light bulbs failed the test. round the answer 3 decimals places

*Friday, July 29, 2016 by bernie*

**statistics**

can someone help me with the question i asked please thank you

*Friday, July 29, 2016 by bernie*

**statistics**

twenty light bulbs are tested to see if they claims last long as the manufacturers claims they do. three light bulbs failed the test. two light bulbs are selected at random without replacement from this collection of bulbs find the probability that both light bulbs failed the ...

*Friday, July 29, 2016 by bernie*

**statistics**

can i get help with my question thank you

*Friday, July 29, 2016 by bernie*

**Statistics**

The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.3 years. What percentage of individual aircraft have ages greater than 15 years?

*Tuesday, July 26, 2016 by Shawn*

**statistics**

y=8+13x

*Monday, July 25, 2016 by william*

**statistics**

2424% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit ...

*Monday, July 25, 2016 by Anonymous*

**Statistics**

Assume that women's heights are normally distributed with a mean given by mu equals 63.8 inμ=63.8 in, and a standard deviation given by sigma equals 3.1 inσ=3.1 in. Complete parts a and b.

*Sunday, July 24, 2016 by Keith*

**statistics**

find the number of units that must be produced to break even. R(x)=200x - x^2 C(x)= 70x +2200 0 < x < 100 (These < are supposed to b less than or equal to signs)

*Wednesday, July 20, 2016 by Anonymous*

**statistics**

What is straight line depreciation for an item that costs $15,951. whose life is 13 years?

*Wednesday, July 20, 2016 by Anonymous*

**statistics**

2) sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants 6 seeds, what is the probability that; a) exactly four seeds will germinate? b) at least five will germinated? c) at most one will not ...

*Monday, July 18, 2016 by nancy*

**statistics**

sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants seeds, what is the probability that; a) exactly four seeds will germinated? b) at least five will germinated? c) at most one will not germinated?

*Sunday, July 17, 2016 by nancy*

**statistics**

A basketball player makes 60% of the free throws that he attempts, except that if he has just tried and missed a free throw then his chances of making a second one go down to only 30%. Suppose he has just been awarded two free throws. Find the probability that he makes both. ...

*Saturday, July 16, 2016 by john*

**statistics**

sue, a botanist, is studying a new plant seed. if it is known that these seeds have a 95% probability of germinating. if sue plants seeds, what is the probability that; a) exactly four seeds will germinated? b) at least five will germinated? c) at most one will not germinated?

*Saturday, July 16, 2016 by nancy*

**statistics**

If 6 bass are randomly selected from Clear Lake, find the probability that the mean weight is greater than the mean of those you caught

*Wednesday, July 13, 2016 by Anonymous*

**statistics**

In a shipment of mangoes , 90

*Wednesday, July 13, 2016 by che*

**statistics**

If P(A)=11/13, find P(Ā) Find the indicated probability

*Monday, July 11, 2016 by Anonymous*

**Math**

2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a random sample of grades achieved by 8 female students. Male 78 87 75 64 90 80 65 86 74 81 Female 71 50 80 75 90 61 85 81 Test at = 0.01 ...

*Sunday, July 10, 2016 by Paulo*

**statistics**

A large school district would like to estimate the mean score for all of its 5th grade students on a certain mathematics achievement test known to produce scores that are normally distributed in this population. In a pilot study, n = 25 randomly selected 5th graders take the ...

*Saturday, July 9, 2016 by ella*

**Statistics**

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within four percentage points with 99 % confidence, ...

*Wednesday, July 6, 2016 by Zechariah*

**statistics**

A jar contains 2 red balls, 2 blue balls, 2 green balls and 1 orange ball. Balls are randomly selected, without replacement, until 2 of the same colour are obtained. Calculate the probability that more than 3 balls must be selected.

*Saturday, July 2, 2016 by peter*

**Reserach Statistics in CRJU**

A data set has n=10 pairs of X and Y values. This data has SSx=10, SSy= 20 and SP=10. Compute the Pearson correlation and explain r=sp/√ssx ssy = 10/√10*20= 10/√200 Simplify 200 under radical= 200 as 10^2⋅2. √(〖10〗^2 )×2= 10/10&#...

*Thursday, June 30, 2016 by Michelle*

**C++**

My assignment: 1- Rewrite your C++ program in Project 1 to compute the number of words, average length and lengths of the words in the text file words.txt – the input file. Each line in the input file contains exactly one word. The words in the input file are sorted ...

*Thursday, June 30, 2016 by Josh*

**Statistics**

In a sample of 1000 tires, with a mean of 250 miles per tire....about how many tires will last longer than 300 miles?

*Thursday, June 30, 2016 by Wade*

**Statistics**

example of a finished apa independent project with between subjects and analysis of variance

*Friday, June 24, 2016 by KT*

**Statistics**

Choose and observational study for and independent project using 3 between subjects and Anova

*Friday, June 24, 2016 by KT*

**Probability and statistics**

Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 3 or more stars in 16 cubic light years? (b...

*Thursday, June 23, 2016 by Sarah*