# Statistics

**Statistics and probability**

A science class has four girls and four boys in the seventh grade and three girls and five boys in the eighth grade the teacher randomly selects a seventh grader and an eighth grader from the class for competition what is the probability that the student she selects are both boys

**statistics**

The distribution of grades of 50 students in a certain subject is normally distributed with a mean of 86 and a standard deviation of 12. 6. 7. If the passing grade is 75, how many failed in the subject?

**Statistics**

According to a recent survey, 65% of all customers will return to the same grocery store. Suppose 11 customers are selected at random,what is the probability that A) exactly 5 will return? B) all 11 will return? C) at least 6 will return D) at least one will return E) how many...

**Statistics**

According to a recent survey, 65% of all customers will return to the same grocery store. Suppose 11 customers are selected at random,what is the probability that A) exactly 5 will return? B) all 11 will return? C) at least 6 will return D) at least one will return E) how many...

**statistics**

The Middlecreek Branch of the National Bank of Virginia has 10 real estate loans over $1,000,000. Of these 10 loans, 4 are "underwater." A loan is underwater if the amount of the loan is greater than the value of the property. The chief loan officer decided to randomly slect ...

**Statistics**

The class average on the quarterly exam was65% with a standard deviation of 7%. Is the probability that a student got 70% or higher 24%

**Probability and Statistics**

In a population where 85% prefer Candidate A, an organization conducts a poll of 19 voters. Find the probability that 17 of the 19 voters will prefer Candidate A.

**Probability and Statistics**

A high school baseball player has a 0.193 batting average. In one game, he gets 7 at bats. What is the probability he will get at least 2 hits in the game?

**Probability and Statistics**

If a seed is planted, it has a 95% chance of growing into a healthy plant. If 6 seeds are planted, what is the probability that exactly 4 don't grow?

**Probability and Statistics**

According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly select peanut M&M’s from an extra-large bag looking for an orange candy. (Round all ...

**Statistics**

The mean score on a test was 280 and the standard deviation was 20. You want to pick the top 15%. What will be the minimum cutoff score to be in the top 15%?

**Statistics**

Assuming that the probability of male birth is 0.5,find the probability that in the family of 4 children there will be A. 1 boy B. 2 boys C. At least a boy

**Statistics**

Consider the probability that fewer than 17 out of 145 people will get the flu this winter. Assume the probability that a given person will get he flu this winter is 11%. Approximate the probability using the normal distribution. Round the answer to four decimal places.

**probability and statistics**

Roll a fair six-sided die until you roll a number that is less than one of your previous rolls. To three decimal places, what is the expected value of the number of rolls made?

**English/Grammar Tutor Please !!!!!!!!!**

As the public uproar over generic drug and off-patent, off-exclusivity branded drug price gouging heightens, state experts and patient activists in Maryland are lobbying for politicians to implement a law that would prohibit price gouging of important off-patent non-brand ...

**statistics**

1. The manager of a large factory believes that the average hourly wage of the employees is below $9.78 per hour. A sample of 18 employees has a mean hourly wage of $9.60. The standard deviation of all salaries is $1.42. Assume the variable is normally distributed. At = 0....

**math**

A medical researcher wants to determine whether male pulse rates vary more or less than female pulse rates. Using the sample pulse rates in Data Set 1 in Appendix B, the male pulse rates can be summarized with the statistics 40=n,69.4=x,11.3=s. For females, the statistics are,...

**Statistics**

Sickle cell disease is an inherited blood disorder that affects red blood cells. Since it is a recessive disorder, a person inheriting two sickle cell genes will have the disease, whereas a person inheriting only one sickle cell gene will be healthy, but will carry the sickle ...

**statistics**

Is Independent variable Depression categorical nominal or ordinal or continuous variables (interval or ratio) Answer: ordinal Is Independent variable College Life(academic and social) nominal or ordinal or continuous variables (interval or ratio)? Answer: Ordinal Is Dependent ...

**Statistics**

I don't understand this at all.. Assume that the weights of Chinook Salmon in the Columbia River are normally distributed. You randomly catch and weigh 40 such salmon. The mean weight from your sample is 24.1 pounds with a standard deviation of 3.5 pounds. Test the claim that ...

**statistics**

In the case of Castaneda vs Partida, it was noted that although 80% of the population in a Texas county was Mexican-American, only 39% of those summoned for grand juries were Mexican-American. Assume that 12 jurors are to be summoned from a population that 80% Mexican-American...

**statistics**

In a game of dice, the probability of rolling a 12 is 1/36. The probability of rolling a 9, 10, or 11 is 9/36. The probability of rolling any other number is 26/36. If the player rolls a 12, the player wins $5. If the player rolls a 9, 10, or 11, the player wins $1. Otherwise...

**statistics**

A hotel operates a shuttle bus between the hotel and the airport. The maximum capacity of the hotel’s minivan is 10 passengers. On each trip from the airport, the manager of the hotel conducts the experiment of noting the number of people in the minivan.a) What is an ...

**education tecnology**

1)what is a database: A)a group of information in slides B)a digital collection of information that can be sorted , organized , and analyzed C)a cart that is displays data from several fields D) a group of records about one person 2)for which of the following can a data base ...

**Statistics**

In the case of Castaneda vs Partida, it was noted that although 80% of the population in a Texas county was Mexican-American, only 39% of those summoned for grand juries were Mexican-American. Assume that 12 jurors are to be summoned from a population that 80% Mexican-...

**Statistics**

In a game of dice, the probability of rolling a 12 is 1/36. The probability of rolling a 9, 10, or 11 is 9/36. The probability of rolling any other number is 26/36. If the player rolls a 12, the player wins $5. If the player rolls a 9, 10, or 11, the player wins $1. Otherwise...

**Statistics**

A hotel operates a shuttle bus between the hotel and the airport. The maximum capacity of the hotel’s minivan is 10 passengers. On each trip from the airport, the manager of the hotel conducts the experiment of noting the number of people in the minivan.a) What is an ...

**Statistics**

From five faculty members and four students, a committee of four is to be chosen that includes two students and two faculty members. In how many ways can this be done? Please show more than one approach.

**Statistics**

A math department is allowed to tenure 4 of 17 eligible instructors. In how many ways can the selection for tenure be made? Please show more than one approach.

**Statistics**

A robber has stolen a locked briefcase. The lock on the briefcase can be opened with a three-digit code, where each digit is one of the digits from 0 to 5.a) How many codes are possible if each digit may be used more than once?b) How many codes are possible if each digit may ...

**Statistics**

There are 4 daily flights from Palooka to Wichita and 6 daily flights from Wichita to Kalamazoo. How many different ways are there to fly from Palooka to Wichita one day, and then to Kalamazoo the following day? Please show more than one approach.

**English**

"The number of souls in Ireland being usually reckoned one million and a half, of these I calculate there may be about two hundred thousand couples whose wives are breeders, from which number I subtract thirty thousand couples, who are able to maintain their own children..." ...

**Math**

According to the National Center for Health Statistics, the mean height of an American male is 69.3 inches and the mean height of an American female is 63.8 inches. The standard deviation for both genders is 2.7 inches. According to Chebyshev’s Theorem 75% of the data for ...

**statistics**

In 2000, National data suggested that 26% of all U.S. businesses were owned by women. In 2009, a consulting firm surveyed a random sample of 700 U.S. businesses and found that 28% of them were owned by women. Is this evidence of an increase in the percentage of businesses that...

**Statistics**

there is good evidence that moderate alcohol use improves health. some people think that red wine is better for your health than other alcoholic drinks. you have recruited 300 adults aged 45-65 who are willing to follow your orders about alcohol consumption over the next 5 ...

**Statistics**

A gambling game works as follows: you flip a fair coin and roll a fair six-sided die. You will be paid $2 if you roll a 6 and $1 if you get a head and an odd number of spots. Otherwise, you have to pay $2.50. a) What is the probability of rolling a die greater than 1? b) What ...

**Statistics**

Suppose the weights of Farmer Carl's potatoes are normally distributed with a mean of 7.9 ounces and a standard deviation of 1.1 ounces. Suppose Carl bags his potatoes in randomly selected groups of 6. What percentage of these bags should have a mean potato weight between 7.5 ...

**Statistics**

Suppose the weights of Farmer Carl's potatoes are normally distributed with a mean of 8.0 ounces and a standard deviation of 1.2 ounces. (a) If 4 potatoes are randomly selected, find the probability that the mean weight is less than 9.8 ounces. (b) If 8 potatoes are randomly ...

**Statistics**

Assume the weights of Farmer Carl's potatoes are normally distributed with a mean of 7.0 ounces and a standard deviation of 1.3 ounces. He bags his potatoes in groups of 6. You buy a bag and the total weight is 36 ounces. Here we determine how lucky or unlucky you are. (a) ...

**statistics**

I have a Cronbach alpha .386 this is considered to be unacceptable

**Econ stats**

Sidney Crosby’s score statistics for the regular 2007 championship season were used to construct the following table: Experimental Outcome (x), Number of Occurrences during the 2007 Season (0, 358) (1, 175) (2 28) (3 3) (4 10) a. Use the relative frequency method to create ...

**Statistics**

A fair coin is to be flipped 500 times. Use the “two-standard-deviation-rule” to calculate two numbers e and f such that the probability that the proportion of times that a head turns up will lie between e and f is approximately 95%. I am totally confused and don't know ...

**Statistics**

QUESTION 1 Use the following scenario and data for all the questions The lives of Lithium batteries used in a type of cell phones are normally distributed with an unknown standard deviation. A simple random sample of equation batteries is selected. The sample mean and standard...

**Statistics**

my z score for a rats liver glycogen percentage is -0.62 and the average population is 3.32. How can I analyze my z score? what does it mean relative to the population

**Statistics**

The mean salary of 5 employees is $34300. The median is $35500. The mode is $36200. If the median paid employee gets a $3000 raise, then what is the new mean, median, mode?

**Statistics of Psychology**

A population of N=6 scores ha EX=12 and Ex squared=54. What is the value of SS for this popluation

**Math**

We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 38 students from the population. If the true percentage is really 77â€‹%, find the probability of ...

**Math**

We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject. Suppose we randomly and independently selected 38 students from the population. If the true percentage is really 77%, find the probability of ...

**Business**

What strategies could I use to re-sell products at the flea market and earn a higher profit? I watched the show the apprentice that this question is based on and in that the winning team chose to have their booth outside and sell women's jewellery and clothes that they ...

**Statistics**

In a college there are 143 scholars , 64 of them are research scholars and the rest are teaching scholars. All of them make an average of $275 per month. How much do the group of research scholars earn on average? I guess I have to use mean formula but I don't know how , could...

**Statistics**

There are two decks of cards. Each deck has a red, a yellow, a blue, and a green card in it. If a card is drawn, from the first deck, and then a second card drawn from the second deck, what is the probability that a red card and green card are drawn (not necessarily in that ...

**Statistics**

There are ten Cortland, seven Gala and eight Macintosh apples in a basket. You pick three apples from the basket. a) What is the probability that three picked apples are all Gala or all Macintosh? b) What is the probability that three picked apples are one Gala and two ...

**business**

1. An evaluation of the impact of Globalisation in ay country of your choice to date, and in the future. You will need to cite relevant statistics and factual data

**Algebra2**

Use the formula D=rt where D is distance, r is rate, and t is time. The distance is 40 Julio finishes the 40 yd dash in 4.39 seconds. Rich finishes it at 6.18 seconds 1. Solve D=rt for rate. (1 pt) D/t=r 2. Use the statistics given in Act Two and your equation from #1. ...

**Statistics**

based on a study by Dr.P. Sorita Soni at Indiana University, we know that the eye colors in the United States are distributed as follows: 42% brown, 35% blue, 11% green, 6% gray, and 6% hazel b) identify onw factor that might make this particular sample biased and not ...

**Algebra 2**

Use the formula D=rt where D is distance, r is rate, and t is time. 40 yard dash: Julio took 4.39 seconds, Rich took 6.18 1. Solve D=rt for rate. (1 pt) 40 2. Use the statistics given in Act Two and your equation from #1. a. At what speed (rate) does Rich run the 40-yard dash...

**algebra 2**

Use the formula D=rt where D is distance, r is rate, and t is time. 1. Solve D=rt for rate. (1 pt) 40 2. Use the statistics given in Act Two and your equation from #1. a. At what speed (rate) does Rich run the 40-yard dash? (1 pt) b. At what speed (rate) does Julio run the 40-...

**statistics**

In the game of roulette, a wheel consists of 38 slots numbered 0, 00, 1, 2,..., 36. To play the game, a metal ball is spun around the wheel and is allowed to fall into one of the numbered slots. If the number of the slot the ball falls into matches the number you...

**statistics**

Find both the -intercept and the -intercept of the line given by the equation . Round your answers to decimal places.

**Statistics**

In a particular manufacturing plant, two machines (A and B) produce a particular part. One machine (B) is newer and faster. In one five-minute period, a lot consisting of 32 parts is produced. Twenty-two are produced by machine B and the rest by machine A. Suppose an inspector...

**Statistics**

In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all adults invest in mutual funds. Suppose a random sample of 25 stock investors is taken. a. What is the ...

**statistics**

Find both the -intercept and the -intercept of the line given by the equation . Round your answers to decimal places.

**statistics**

In how many ways can letters be chosen from , assuming that the order of the choices doesn't matter and that repeats are not allowed?

**statistics**

An ordinary (fair) die is a cube with the numbers 1 through 6 on the sides (represented by painted spots). Imagine that such a die is rolled twice in succession and that the face values of the two rolls are added together. This sum is recorded as the outcome of a single trial ...

**Language Arts please help**

1)Which of the following best describes an expository essay? an essay that uses casual, conversational language an essay that tells a story about a real-life experience an essay that explains an idea by breaking it down*** an essay that uses humor to achieve the author's ...

**AP Statistics**

why might s be more commonly used than s squared as a measure of variability?

**Statistics**

The Jones family was one of the first to come to the U.S. They had 9 children. Assuming that the probability of a child being a girl is .5, find the probability that the Jones family had at least 5 girls.

**Statistics**

Williams, Dunsiger, Jennings, and Marcus (2012) conducted a study to test how enhanced mood during exercise can increase the likelihood of physical activity in the future. They reported that at 6 months of physical activity, mood scores (rated on a scale from -5 to +5) after a...

**Statistics and Probability**

A ticket in a typical lottery like Lotto 6/49 is usually $2. The probability of winning Lotto 6/49 is 1 in 13,983,816. The payoffs (jackpots) are usually in excess of $1 million. Suppose that you buy one ticket for $2 and the jackpot is $1 million. What is your expected value ...

**Statistics**

A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly produces a positive ...

**Statistics**

A common blood test performed on pregnant women to screen for chromosome abnormalities in the fetus measures the human chorionic gonadotropin (hCG) hormone. Suppose that in a given population, 6% of fetuses have a chromosome abnormality. The test correctly produces a positive ...

**Statistics**

Presented with recordings of a pair of people of the same sex speaking the same phrase, can a listener determine which speaker is taller simply from the sound of their voice? Twenty-four young adults at Washington University listened to 100 pairs of speakers, and within each ...

**Statistics**

What is the square root of 7

**statistics**

If we wish to have a 90% confidence interval, what would be the value of α/2? Show how you arrived at this answer.

**Statistics**

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.62 and a standard deviation of 0.43. Using the empirical rule, what percentage of the students have grade point averages that are at least 3.48? ...

**Probability and Statistics**

A certain system can experience three different types of defects. Let Ai (i = 1,2,3) denote the event that the system has a defect of type i. Suppose that P(A1) = 0.34, P(A2) = 0.33, P(A3) = 0.43, P(A1 ∪ A2) = 0.6, P(A1 ∪ A3) = 0.64, P(A2 ∪ A3) = 0.67, P(A1...

**Statistics**

A genetic trait is inherited in such a way that for a father with the trait, his male offspring have a 25% chance of inheriting it but his female offspring cannot inherit it. Suppose that in a certain population, 40% of offspring are male and offspring genders are independent ...

**Statistics**

Explain verbally why n choose x is the same as n choose (n-x). I showed why they are the same mathematically, but I am not sure how to word it. Thanks.

**Statistics**

study looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours of light and 12 hours of dark (LD), while another fifty mice were assigned to 24 hours of light (LL). Researchers observed the mice for two years. Two of the LD ...

**Statistics**

A statistics class is made up of 60% women and has 21 women in it. What is the total number of students in the class?

**Statistics**

3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the heights of the first five...

**Statistics**

An article in a Health Magazine suggested getting a dog to encourage more regular walking. A researcher for the article found that the distribution of time spent walking dogs is approximately normally distributed with a mean of 38 minutes per day. However he also found that 13...

**Bio Statistics - Math**

I really need some help and guidance with these! 1.) What kind of variable is P1Wt? 6.) What is the approximate histogram shape of P1Ht? 7.) What is the mean, median, and mode of P1Ht? 9.) What kind of variable is P1Age? 10.) What is the approximate histogram shape of P1Age? ...

**Statistics**

A wide variety of oak trees grow in the United States. In one study, a sample of acorns was collected from different locations, and their volumes, in cm3, were recorded. In the table are summary statistics for these data: N 38 Mean 3.0 Median 1.8 St. Dev. 2.6 Minimum 0.3 ...

**statistics**

According to Chebyshev’s theorem, what proportion of a distribution will be with k=4 standard deviations of the mean? Show all work as to how to find this

**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 larger than the median.

**statistics**

Suppose that IQ scores have a bell-shaped distribution with a mean of 95 95 and a standard deviation of 18 18 . Using the empirical rule, what percentage of IQ scores are at least 149 149 ? Please do not round your answer.

**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 smaller than the median.

**Statistics**

A die is rolled 16 times and the number that appeared for each roll was recorded. Number on die for each roll 5 2 2 6 1 4 6 1 1 3 5 2 2 3 4 4 If this data were to be displayed using a dot plot, what numbers would be displayed along the horizontal number line? Which numbers ...

**Statistics**

in a study of a weight loss program 30 subjects lost a mean of 2.6lbs after 12 months. methods of statistics can be used to show that if this diet had no effect, the likelihood of getting these results is roughly 6 chances in 1000. does the weight loss program have statistical...

**Satistics**

1.A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscientific survey had an initial result of 30%. 2. The design ...

**Statistics**

Someone help me understand this please?? The following is a frequency data set for test scores in a small class. Construct a cumulative frequency plot displaying the data on your own paper, calculator, or StatCrunch. Then, describe the the graph in a sentence or two. Be sure ...

**Statistics**

Which of the following is not true about histograms? A) The bars must touch each other. B) A histogram may be symmetric or skewed depending on the selection of bin width. C) Each bin must have the same width. D) Histograms may represent categorical data. E) Histograms may have...

**Statistics**

describe the distribution of the data with regard to the shape, outliers, center, and spread. Time Number of People 10 am - 11 am 20 11 am - 12 pm 21 12 pm - 1 pm 19 1 pm - 2 pm 21 2 pm - 3 pm 23 3 pm - 4 pm 19 4 pm - 5 pm 24 5 pm - 6 pm 23 6 pm - 7 pm 20 7 pm - 8 pm 23

**probability and statistics**

An ice-cream store has exactly 6 flavors of ice-cream. Each of 6 friends likes exactly 4 flavors. Is there guaranteed to be a flavor which at least 4 friends like?

**statistics**

Car seat belts are tested for strength, and it is found the results are normally distributed with a mean of 2400 lb and a standard deviation of 400 lb. Using the 68-95-99.7 rule, find the percentage of scores between 1600 lb and 3200 lb.

**probabilities in statistics**

let two cards be dealt sucessively, without replacement, from a standard 52-card deck. find the probability of each event. a) club dealt second, given a diamond dealt first. b) the first card is the ace of hearts and the second is black

**Statistics**

What is the probability that simple random sample of 50 staff members provides a sample mean leave of 6.5 to 9.5 weeks?

**Statistics**

What's an example of two variables from your intended career that you would like to draw a Scatterplot for and subsequently to compute a Correlation Coefficient for and to derive the equation of the Scatterplot's corresponding Regression Line.

**statistics**

In a study, 35% of adults questioned reported that their health was excellent. A researcher wishes to study health of people living close to a nuclear power plant. Among 14 adults randomly selected from this area, only 3 reported that their health was excellent. Find the ...