According to the American Red Cross, 8% of all Connecticut residents have Type B blood. A random sample of 25 Connecticut residents is taken. X=the number of CT residents that have Type B blood, of the 25 sampled. What is the standard deviation of the random variable X?

Q: Public health statistics indicate that 26% of  American adults smoke cigarettes. A random sample of…

A:

Q: What

A: Explanation and solutions is given below....

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: A population has a mean of 200 and a standard deviation of 25. A sample of 64 observations will be…

A: We have to find out given probabiity..

Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 668 grams and a standard…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: A particular fruit's weights are normally distributed, with a mean of 788 grams and a standard…

A: Let "X" be the weight of the heaviest fruit in grams. Find z-value (z): Since the total area…

Q: A particular fruit's weights are normally distributed, with a mean of 583 grams and a standard…

A: To find: The heaviest 15% of fruits weigh more than how many grams?

Q: The average height for female golden retrievers is 21.96 inches with a standard deviation of 1.77…

A: Given,mean(μ)=21.96standard deviation(σ)=1.77

Q: A particular fruit's weights are normally distributed, with a mean of 377 grams and a standard…

A: Find z-value: Note: The total area under the normal curve is 1. Area to the left of z under the…

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Population size (N) = 500 Mean (µ) = 75 Standard deviation (σ) = 7…

Q: Mathematics majors generally have one of the highest starting salaries. Suppose the average starting…

A: For Normal distribution z score = (x-μ)/σx

Q: Write out the formula of the standard deviation of a variable called X in a population. Be sure to…

A: 1.  Write out the formula of the standard deviation of a variable called X in a population. Be sure…

Q: A particular fruit's weights are normally distributed, with a mean of 361 grams and a standard…

A: From the provided information,

Q: A particular fruit's weights are normally distributed, with a mean of 625 grams and a standard…

A:

Q: A World Health Organization study of health in various countries reported that in Canada, systolic…

A:

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A:

Q: assigns a value to a number based on how many standard deviations it stands from the mean and is an…

A: Z-score: It is also called a standard score. It estimates how far a data point is from the mean of a…

Q: In a recent study, the Centers for Disease Control and prevention reported that diastolic blood…

A: The problem provides us with the following values:Mean (μ) = 80.5 mmHgStandard deviation (σ) = 9.9…

Q: A particular fruit's weights are normally distributed, with a mean of 649 grams and a standard…

A: Let  be the fruit's weight.Mean: Standard deviation: i.e.

Q: 95% of 80 night students scored between 70% and 80% on a quiz. If this data is normally distributed,…

A: Given: Total number of students n=80.             let X  denote the marks of students then,  X ~N(µ,…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.2…

A:

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 7 Let X be a random variable…

Q: A normal population had a mean of 70 and a standard deviation of 12. You select a random sample of…

A: μ = 70σ = 12n = 9P(x¯>73) = ?

Q: A particular fruit's weights are normally distributed, with a mean of 349 grams and a standard…

A: Let X be the particular fruits weight. The Mean is μ=349. The standard deviation is σ=36.

Q: A fair die is rolled 11 times. Find the standard deviation of the number of times a 4 comes up.…

A: A die is rolled 11 times.  Let the random variable x denote the die which shows a number of times a…

Q: A particular fruit's weights are normally distributed, with a mean of 767 grams and a standard…

A: Given data,μ=767σ=39P(X>x)=0.11x=?

Q: Americans (on average) individually eat 16 pounds of seafood each year with a standard deviation of…

A: Given that   x̄ = 14 , μ = 16 , ? = 7 , n = 4

Q: normal population had a mean of 70 and a standard deviation of 12. You select a random sample of 9.…

A: given data normal distributionμ = 70σ = 12n = 9 P(x¯<66) = ?

Q: A student randomly guesses at four multiple-choice questions. Each question has three possible…

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Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: Define the term standard deviation?

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: 1.2, 2.7, 5.3, 3.4, 4.1,4.6, 3.3, 2.6. Find the standard  deviation

A:

Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…

A: Formula : Mean = np Standard Deviation  :

Q: A particular fruit's weights are normally distributed, with a mean of 527 grams and a standard…

A: Given that, The heaviest 9% of fruits weight more than the number of grams is

Q: A population has a mean of 84 and a standard deviation of 12. A sample of 36 observations be taken.…

A: Given: Population mean μ = 84 Population standard deviation σ = 12 Sample size n = 36

Q: The average amount customer spend yearly at a local grocery store is $635.55 .  Assume the variable…

A: Mean(µ) = $635.55Standard deviations (σ) = $94.41X ~ N (µ, σ )= N(635.55,94.41)

Q: A particular fruit's weights are normally distributed, with a mean of 477 grams and a standard…

A:

Q: A published study says that 95 percent of American children are vaccinated against measles, with a…

A: A t-test is used to determine the test if there is any significance difference between two mean…