Of all the students, 44% own an iPhone, with a standard deviation of .03 If you took a sample of 400 students and asked who owns an iPhone, the standard deviation for this group would be what?   For that same sample of 400 students, what is the probability that at least 42% of them own an iPhone?

Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…

A:

Q: According to flightstats.com, Jet Blue flights from Dallas to Seattle are on time 90% of the time.…

A: Hello there! there are more than three subparts in the question. According to our policies we cannot…

Q: Suppose average study hours of students passing Statistics Lecture was 75 hours and standard…

A: Given that, Mean = 75 Standard deviation = 25

Q: Suppose 42 % of the students in a university are baseball players. If a sample of 628 students is…

A:

Q: A civil engineer takes a public ride going to his firm. The average time for his trip is 24 minutes,…

A: Given Information: Population mean (u) = 24 minutes Standard Deviation (s) = 3.80 minutes Target…

Q: Consider a gamble with a 40% chance of winning $10 and a 60% chance of losing $10. What is the…

A: Given data: The given chance of winning is P(W)=40%=0.40. The given chance of losing is…

Q: There are 350 dogs at a dog show, who weigh an average of 15 pounds with a standard deviation of 7…

A: Given,sample size(n)=40mean(μ)=15standard deviation(σ)=7

Q: Suppose 20% of all emergency room patients have broken bones. Of the next fifteen patients to…

A:

Q: According to a poll of​ adults, about 4848​% work during their summer vacation. Assume that the true…

A: From the given information, it is clear that sample size, n = 600.The probability of success, p hat…

Q: Suppose the scores, on a college entrance examination are normally distributed with a mean of 1000…

A: We have given that Suppose the scores, on a college entrance examination are normally distributed…

Q: In 1999, the murder rates (per 100,000) for the 50 states and the District of Columbia had a mean of…

A:

Q: 1. The mean weight of 5-year-old children is 39.5 pounds, and the standard deviation is 3.2 pounds.…

A: Given that  X~N(μ= 39.5 , σ= 3.2 ) μ= 39.5 , σ= 3.2 , n=52

Q: Suppose it is known that 80% people own a cellphone. If a random sample of 100 people were surveyed,…

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Q: Since a population has a mean of 73.5 and a standard deviation of 2.5, what is the probability that…

A: We have to find given probability.....

Q: In a study of work patterns, data from 669 subjects were collected. For the time spent in child…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 23.08,…

Q: A population has a mean of 200, a standard deviation of 30, and is normally distributed. A sample of…

A: We want to find the probability  Note: This probability value calculated from standard normal…

Q: according to the government data the probability that a woman between the age of 25 and 29 was never…

A: Given, Probability that a women between the ages of 25 and 29 was never marries is 40%. i.e. p =…

Q: The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of…

A:

Q: On average a supermarket sells 500 litres of milk a day with a standard deviation of 50 litres. If…

A: Assume, X be the random variable representing the quantity of milk sold per day (in liters). It is…

Q: If the grades on a statistics test are normally distributed with a mean of 80 and a standard…

A: Introduction: Define X as the grade of a randomly selected student. It is given that X has a normal…

Q: On average a supermarket sells 500 litres of milk a day with a standard deviation of 50 litres. If…

A: As per Bartleby's guidelines, three parts of the given question can be solved at a given time. Given…

Q: 4. The average public elementary school has 468 students with a standard deviation of 87. If a…

A: Here use given step by step solution and normal distribution of sample mean

Q: The distribution of IQ scores for high school graduates is normally distributed with μ = 104 and σ =…

A:

Q: A final exam in science 160 has a mean of 73 with a standard deviation of 7.8. If 25 students are…

A: Given information- Population mean, µ = 73 Population standard deviation, σ = 7.8 Sample size, n =…

Q: A study at a college in the west coast reveals that, historically, 45% of their students are…

A: a) It is known that, the mean of the sampling distribution of sampling distribution, p-hat is equal…

Q: The distribution of heights for women in the United States is approximately normal, with a mean of μ…

A: Where,

Q: ). If a certain machine manufactures electrical resistors that have a mean resistance of 201.35 ohms…

A: Solution

Q: The average age of accountants is 43 years, with a standard deviation of 5 years. If an accounting…

A: From the given information,   Mean = 43 Standard deviation = 5 Sample size = 30

Q: A quality control expert at a large factory estimates that 10% of all the batteries produced at the…

A:

Q: From the past experience, 70% of the stocks are profitable. What is the probability that 5 of the 8…

A:

Q: Assume you have a binomial distribution. In an experiment with 100 trials and a probability of a…

A: Given that, n=100 p=1/2 =0.5 Standard deviation=?

Q: It is believed that the average shoulder height of Furry Manumars is 16 inches, with a standard…

A: Given the mean height of furry Manumars as 16 inches, the standard derivation as 2 inches , sample…

Q: Suppose the heights of 18 year old men are approximately normally diatributed, with mean 67 inches…

A: Mean = 67 Standard deviation = 5

Q: In a certain country, the average age is 31 years old and the standard deviation is 4 years. If we…

A: From the provided information, Mean (µ) = 31 years Standard deviation (σ) = 4 years X~N (31, 4) Here…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 11 inches,…

A: Given :  sample mean = 11             standard deviation of samples=1.722=0.3624412178…

Q: 3. For a certain type of computers, the length of time bewteen charges of the battery is normally…

A: Given information: Mean=50 hours and standard deviation=15 hours. That is, μ=50 and σ=15

Q: USA Today reported that about 22% of all people in the United State are illiterate. Suppose you…

A: Let X be the people who are illiterate. Let person being illiterate be success, then X follows…

Q: he weights of truffles follow a normal distribution, with a mean weight of 347 grams and a standard…

A: Here it is given that - Mean (μ) = 347 Standard deviation (δ) = 15.3 Let X be the weight of truffles…

Q: From past experience, it is known that the number of tickets purchased by students standing in line…

A: Given μ=2.4σ=2.0

Q: Suppose the heights of 18 year old men are approximately normally distributed, with mean 71 inches…

A: The normal distribution is the most useful theoretical distribution for continuous variables. For…

Q: The distribution of heights for men in the United States is approximately normal, with a mean of μ =…

A: Where,

Q: It has been reported that in a certain university 2% of the 2 million international students receive…

A:

Q: From the past experience, 30% of the stocks are profitable. What is the probability that 5 of the 7…

A: Obtain the mean of the random variable X.   The mean of the random variable X is obtained below as…

Q: Of all the students, 44% own an iPhone, with a standard deviation of .03   For that same sample of…

A: Given that of all the students, 44% own an iPhone. This means the mean=0.44 Standard deviation=0.03…

Q: Suppose 150 people take a quiz, and say the mean score was a 100 out of 200 points, with a standard…

A: Given data:     The given mean score is: μ=100. The standard deviation is: σ=40. The number of…

Q: The average number of moves a person makes in his or her lifetime is 12. If the standard deviation…

A: Given,   Mean = 12 Standard deviation = 3.2 Sample size = 30

Q: f the population mean is 410 and the population standard deviation is 10, what is the probability…

A:

Q: Suppose that 8% of all males suffer some form of color blindness. 350 men are sampled. a. What is…

A:

Q: According to the US energy administration, the mean monthly household electric bill in the united…

A:

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.