# Homework Help: Math: Statistics

## Recent Homework Questions About Statistics

**statistics**

Assume that men have IQ scores that are normally distributed with a mean of 99 and a standard deviation of 13. Find the IQ score that separated the lower 30% of the others. Round up to the nearest integer.

**Statistics**

A bag contains 8 red marbles 4 blue marbles and 1 green marbles. Find p(not blue)

**Statistics**

According to the record of the registrar's office at a state university, 35% of the students are freshman, 25% are sophomore,16% are junior and the rest are senior. Among the freshman, sophomores, juniors and seniors, the portion of the students who live in the dormitory are ...

**statistics**

there are 7 blue socks,5 red socks,3 green socks and 4 yellow socks in a drawer. 1.find the sample space 2.how many socks should I take out without looking to get a pair of socks 3.what is the probability that the first socks that I draw is red 4.what is the probability that ...

**statistics**

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer’s food. If p ^ is the sample proportion saying that the...

**Statistics**

A card is drawn from a deck of 52 and recorded. Then the card is replaced and the deck is shiffeled. this process is repeated five times. What is the probability that all five times the car drawn is an ace

**statistics**

the arithematic mean of two numbers is 15 and geometric meanis 12.Find the two numbers and find harmonic mean of these numbers.

**statistics**

A crane is designed in such a way that it can lift a maximum load of 2750kg.Is the crane overload if the container is filled with 50 bags of cement 40kg each and 5 machine of average 100kg?

**statistics**

a person drove on a highway first 5km at a speed of 60km/h ,the second 5km at a speed of 85km/h , third 5km at a speed of 92km/h and last 5km of his journey,the speed was 8okm/h.Use suitable average to find average speed of the journey of 20km.

**STATISTICS**

If is equal to 0.79, then is equal to ______.

**business statistics**

1. The average life expectancy of people around the world is 71.30 years with a population standard deviation of 8.00 years. I take a sample of 50 countries now and find that the average life expectancy is 74.37 years. Suppose I’m interested in seeing if there has been a ...

**Statistics**

Need help with this statistics assignment. Of course not asking for you to do it, just an example or help on how to answer. Find some information in a book, research article, newspaper, magazine, or online about any kind of medical research that includes a measure of center or...

**statistics**

A factory's worker productivity is normally distributed. One worker produces an average of 72 units per day with a standard deviation of 23. Another worker produces at an average rate of 68 units per day with a standard deviation of 23. A. What is the probability that in a ...

**statistics**

an archer shoots arrows at the bull's eye of a target and measures the distance from the center of the target to the arrow. identify the random variable of interest, determine whether it is discrete or continuous, and list its possible values

**Statistics**

Suppose that 30% of all college students smoke cigarettes. A sample of 18 is selected randomly. What is the probability that exactly 10 students smoke? Round your answer to four decimal places.

**statistics**

Find sd. The differences between two sets of dependent data are -8, 4, -6, 10. Round to the nearest tenth. A.) 4.3 B.) 195.5 C.) 6.8 D.) 8.5

**Statistics**

"Suppose two independent samples have been collected.Based on a sample of 26 from the first population, you observe 14 successes. The second sample of size 26 had 17 successes. What is the critical value for a 85% confidence interval that compares these two population ...

**Statistics**

A friend gives you the following Fs and decision made. Does the decision appear to be correct? Explain.Do NOT provide critical or table values as explanations. F(2, 63) = .10, not significant F(3, 85) = -1.70, not significant F(1, 120) = 64.32, not significant F(5, 70) = 1.00...

**statistics**

Despite he outrageous incomes of some, the mean income of all aging rock stars is relatively modest: $75,000 with a standard deviation of $2,000. On that scale, Chubby Checker, appears to do better than average: at most, only 6.25% of aging rockers make more than he does. what...

**Statistics**

Suppose Cindy is taking a multiple-choice test where there are 5 possible answers on each question. If she guesses on all 8 questions, what is the probability that she gets: a.) exactly 3 correct. b.) at least 1 correct. c.) What is the mean? d.) What is the standard deviation?

**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 random variable of interest, determine whether it is discrete or continuous, and list ...

**AP Statistics**

The ages of the Oscar-winners for best actor and actress for the years 1970 through 1990 are given below: Women: 34,34,26,37,42,41,35,31,41,33,30,74,33,49,38,61,21,41,26,80,72 Men: 43,40,48,48,56,38,60,32,40,42,37,76,39,55,45,35,61,33,51,32,42 Use what you have ...

**statistics**

Suppose that the mpg rating of Passengers Cars is a normally distributed random variable with a mean and a standard deviation of 33,8 mpg and 3,5 mpg. Question : an automobiles manufacturer wants to build a new Passenger car with an mpg rating that improves upon 99% of ...

**Statistics**

Your pocket contains 2 quarters and 2 Nickels. You randomly pick one of the coins and without replacing it you pick a second coin. Are the events, Q1 = First pick was a quarter Q2 = Second pick was a quarter a) Independent? b) What is the probability of getting a quarter both ...

**Statistics**

Three final candidates (Alex, Bo, and Chris) for a position happen to take different versions of the aptitude test. You are supposed to choose the one who performed best out of these three final candidates and the test results are as follows: Alex received 88 from the test ...

**Statistics**

Please help me with this homework you roll two fair dice, a green one and a red one? (a) are the outcomes on the dice independent? (b)Find P(1 on green die and 2 on red die) (c)Find P(2 on green die and 1 on red die) (d)Find P(1 on green die and 2 on red die) or (2 on green ...

**Statistics**

you roll two fair dice, a green one and a red one? (a) are the outcomes on the dice independent? (b)Find P(1 on green die and 2 on red die) (c)Find P(2 on green die and 1 on red die) (d)Find P(1 on green die and 2 on red die) or (2 on green die and 1 on red die) a)yes b)p(1)*(...

**Statistics**

The Citiburg Parks Department has just installed 1100 new lightbulbs with an expected mean lifespan of 64 months and a lifespan standard deviation of 8 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 49 months? Round your ...

**Statistics**

The Townville Parks Department has just installed 1900 new lightbulbs with an expected mean lifespan of 75 months and a lifespan standard deviation of 12 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 53 months? Round your ...

**statistics**

Suppose the average weight for population of men is 178 pounds. You draw a random sample of 10 men and record the following weights: 150, 145, 180, 200, 175, 190, 142, 175, 240, 150. Calculate the sampling error.

**STATISTICS**

A3. A Retailing Entrepreneur sells sophisticated running shoes whose weights are assumed to be normally distributed with a mean of 12 grammes and a standard deviation of 0.5 grammes. (a) What is the probability that a shoe weighs more than 13 grammes? [3] (b) What must the ...

**STATISTICS**

A2. Reviewed statistics indicated that there is an average of five thefts per day from a large supermarket operating from 08 00 to 19 00 six days a week. Find the probability that there (a) are no thefts in a week. [2] (b) will be ten thefts in any given day. [4] (c) are four ...

**STATISTICS**

Miss Dombo, a Ticketing Manager with an Airline flying international routes, has realised that not all passengers show up for their reserved seat. It is clear to her that each passenger’s behaviour is independent of the other. Having fixed the chances of a passenger not ...

**statistics**

In studying the responses to a multiple-choice test question,the following sample data were obtained. At the .05 significance level, test the claim that the responses occur with the same frequency. show work for test statistic & p. response a b c d e/ 12 15 16 18 19 my answer ...

**Statistics**

The Villopolis Parks Department has just installed 1900 new lightbulbs with an expected mean lifespan of 66 months and a lifespan standard deviation of 6 months. Assuming normally distributed bulb failure, how many bulbs will need to be replaced after 56 months?

**Statistics**

You are interested in estimating the mean of a population. you plan to take a random sample from the population and use the samples mean as an estimate of population mean. Assuming that the population from which you select your sample is normal, which of the statements about ...

**Statistics**

The following simple random sample was selected from a normal distribution: 4, 6, 3, 5, 9, and 3. a. Construct a 90% confidence interval for the population mean μ.

**Statistics**

The playing time X of classical CDs has the normal distribution with mean 54 and standard deviation 5; the N(54, 5) distribution. What is the relative frequency of classical CDs with playing time X between 49 and 69 minutes?

**Statistics**

A VP of manufacturing claims that more than 3% of items produced using a certain assembly line are defective. A random sample of 400 items is selected. At the 10% level of significance, which of the following would be part of the standardized decision rule? - Conclude H0 if TS...

**Statistics**

In a distribution where the mean is to the right of the median, the histogram of the distribution will probably: a. have a longer tail on the right side b. show a uniform distribution c. be symmetric d. be bi-modal

**Statistics**

Scores on the 1995 SAT verbal aptitude test among Kentucky high school seniors were normally distributed with an average of 420 and the SD of 80. Scores on the 1995 SAT quantitative aptitude test among Kentucky high school seniors were normally distributed with an average of ...

**Statistics Probability**

A jar contains 5 red marbles, numbered 1 to 5, and 11 blue marbles numbered 1 to 11. a) A marble is chosen at random. If you're told the marble is red, what is the probability that it has the number 2 on it? b)The first marble is replaced, and another marble is chosen at ...

**STATISTICS**

Suppose that a researcher is interested in estimating the mean systolic blood pressure, , of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate . Assuming that the standard deviation of the ...

**STATISTICS**

A study of college football games shows that the number of holding penalties assessed has a mean of penalties per game and a standard deviation of penalties per game. What is the probability that, for a sample of college games to be played next week, the mean number of holding...

**statistics**

The current rate of success is 70% for 200 students. When the new test is implemented, the rate increases to 85% for the 50 students who pass the test and are allowed into the program. Is this difference significant?

**Statistics**

Assume a study of 500 randomly selected school bus routes revealed 480 arrived on time. Is it significant for a school bus to arrive late?

**Statistics**

A dice rolling just once What is probability of given the face is odd, it is a 1?

**Statistics**

Write an inequality that represents all of the data values X, that fall between the values of the mean +/- the standard deviation

**Health!**

Statistics of Suicide regarding Antisocial Personality Disorder

**science**

identify the best way to display statistics in a research report

**math**

How many paths spell STATISTICS using Pascal's triangle? S T T A A A T T T T I I I S S T I I C C C S S Thanks in advance

**statistics**

A naturalist leads whale watch trips every morning in March. The number of whales seen has a Poisson distribution with a mean of 2.1 Find the probability that on a randomly selected trip, the number of whales seen is 3. Round to four decimal places.

**statistics**

An unfair coin has a probability of coming up heads of 0.55 the coin is tossed 4 times. What is the probability that it lands heads at least once?

**Statistics**

A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of milligrams and a standard deviation of milligrams. What is the probability that randomly selected light cigarettes from this company will have a total combined nicotine content of ...

**Statistics**

If there are 6 red disks numbered 1 through 6, and 4 yellow disks numbered 7 through 10, find the probability of selecting a yellow disk given that the number selected is less than or equal to 4 or greater than or equal to 8.

**Statistics**

A study of 29 female Sumatran elephants provided a 95% confidence interval for the mean shoulder height as (197.2, 235.1) cm. Consider a new study to estimate the mean shoulder height of male Sumatran elephants. Assuming the standard deviations of shoulder heights are similar ...

**Statistics**

A science teacher gives a test with 15 questions. This teacher is a hard grader. The teacher assigns points in the following manner: a correct answer = +1 point, an incorrect answer = -1 point, no answer = 0 points. So scores on the test could range from +15 to -15. The ...

**Statistics**

Suppose that 40 students take a quiz and everyone in the class scores an 80. The standard deviation of scores for this quiz is: 80 2 0

**Statistics**

A college statistics class conducted a survey of how students spend their money. They asked 25 students to estimate how much money they typically spend each week on fast food. They determined that the mean amount spent on fast food is $31.52 with a standard deviation of $21.60...

**Statistics**

suppose that 80% of all 18 year olds play basketball. if a sample size of 4 is taken, find the probability that the sample proportion lies within and including one standard deviation of the population proportion

**Statistics**

The probability a company will hire a new employee is 0.38. Suppose three companies are randomly selected. (a) Find the probability all three companies will hire a new employee. (b) Find the probability at least one company will hire a new employee. (c) Find the probability ...

**statistics**

consider shuffling a standard 52 deck of cards and drawing one which is black. what is the probability that the card is a 4,5,or 6

**statistics**

According to a survey, 21% of motorists in a large city are uninsured. Suppose that currently 21% of all motorists in this city are uninsured. Two motorists are selected at random from this city. Let x denote the number of motorists in this sample of two who are uninsured. ...

**Statistics**

P=8.12E-4<=.01 Why is 8.12 less than .01

**Statistics/Probability**

An observer has measured the starting position of a toy vehicle as xs = 9.3 ± 0.2 m and the finishing position as xf = 14.4 ± 0.3 m. Calculate the displacement and the error in the displacement. I am not sure where to start at all.

**Statistics**

Four cards are chosen at random. What is the probability that at least 2 are J's? How is this problem computed? Using Combinations or permutations?

**Statistics**

If $3000 is invested at 3% compounded monthly how much in 9 years

**Statistics**

If $3000 is invested at 3% compounded monthly how much in 9 years

**Statistics**

Scores on an SAT test have a mean of μ = 1026 and a standard deviation of σ = 209. Compute the margin of error of the sample mean for a random sample of 100 students.

**Statistics**

The weight of luggage that a randomly selected airline passenger brings onto a flight has a mean of 35 lbs and a standard deviation of 6 lbs. If a flight has 80 passengers, within what range would the average weight of their luggage fall with 95% certainty?

**Statistics**

Suppose systolic blood pressure (the higher of the two blood pressure readings) of a large group of individuals is normally distributed. If the mean is 122 and the standard deviation is 20, then

**Statistics**

a ball rolls off a table and falls 0.80 m to the floor, landing with a speed of 4.5 m/s. 1. What was the initial speed of the ball? 2. What initial speed must the ball have if it is to land with a speed of 5.8 m/s? 3. What is the magnitude of the acceleration of the ball just ...

**Math**

This is your question number 2 for today, out of 5 allowed. Here's your question for category 'Probability-and-statistics'. 16 teams decided to participate in a football competition. In the preliminary round, the 16 teams will br divided into 4 groups and they have to compete ...

**Statistics and**

In a survey of 144 pet owners, 31 said they own a dog, and 91 said they own a cat. 14 said they own both a dog and a cat. How many owned neither a cat nor a dog?

**STATISTICS**

A certain disease has an incidence rate of 0.6%. If the false negative rate is 4% and the false positive rate is 4%, compute the probability that a person who tests positive actually has the disease

**Statistics**

Can anyone help me with this? Which of the following statements is true about a 99% confidence interval? a. The interval contains 99% of the population. b. The probability that the population mean is in the interval is 99%. c. The interval is wider than a 95% confidence ...

**statistics**

A STAT 200 instructor is interested in whether there is any variation in the final exam grades between her two classes Data collected from the two classes are as follows: Her null hypothesis and alternative hypothesis are: (a) Determine the test statistic. Show all work; ...

**Statistics**

A doctor want to estimate the HDL cholesterol of all 20- to 29- year old females. how many subjects are needed to estimate the HDL cholesterol within 3 points with 99% confindence assuming s=10.5. Suppose the doctor would be content with 90% confidence. How does the decrease ...

**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.?

**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 ...

**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 ...

**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?

**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?

**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 ...

**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 ...

**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?

**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?

**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?

**Statistics**

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

**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 ...

**Statistics**

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

**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?

**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%

**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

**Statistics**

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

**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)']

**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).

**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?

**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...

**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 ...