4. The SAT scores of the incoming freshmen class are normally distributed with a mean of 1100 and standard deviation of 75. What percent of incoming freshmen have SAT scores greater that 1250? N(1100,75) 120

Q: The mean marks scored by 6 students in a database exam is 54.4. If a student who got 66 is also…

A: Given: old mean=54.4old n=6 An additional item 66 is added. The new mean is calculated as below: new…

Q: What is the corresponding Z- score, mean is 110, standard deviation is 8 and x is 90

A: In question, We'll find the Z - score for mean 110, standard deviation 8 and x = 90. The solution is…

Q: a division wide aptitude test in mathematics was conducted to 1000 students. the mean of the test is…

A: Given : No. of students : Sample size (n) = 1000 Let X : Scores in aptitude test in mathematics…

Q: What is the z score for 20 if mean =28 and stadnard deviation =6

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Assume that the number of pieces per bag has a mean of 264 with a standard deviation of 3. use the…

A: Given :  the number of pieces per bag has a mean of , μ=264  a standard deviation of , σ =3   We…

Q: Elephants have the longest pregnancy of all mammals. suppose that for Asian elephants, the lenghts…

A: The objective of this question is to find the percentage of Asian elephant pregnancies that are…

Q: A distribution consists of three requencies 250, 300, 350 having neans 30, 15 and 20 and standard…

A: We have given that  Size N1=250 , N2=300, N3=350 Sample mean xbar1 =30 , x2=15 , x3=20 Standard…

Q: The length of human pregnancies from conception to birth follows a bell shaped distribution with…

A: Given that  The distribution followed a bell shaped distribution. Mean (μ) =266 days Standard…

Q: A teacher says that the top 9​% of the class received an A on the last test. The scores were…

A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…

Q: Suppose that IQ scores have a bell shaped distribution with a mean of 101 and a standard deviation…

A: The IQ scores have a bell shaped distribution with a mean of 101 and a standard deviation of 17.

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A:

Q: The SAT scores (X) of the students in the U.S. in 2011 are normally distributed with a mean 1500 and…

A: The objective of this question is to find the percentage of students who scored below Darth Vader on…

Q: particular fruit's weights are normally distributed, with a mean of 395 grams and a standard…

A: We have given that Mean=395

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: we have to find given probability..

Q: For woman at Hartford college, times to run 400 meters are normally distributed with a mean of 85…

A: Solution: Let X be the time to run 400 meters. From the given information, X follows normal…

Q: A certain standardized tests math scores have a bell shaped distribution with a mean of 525 and a…

A: GivenMean(μ)=525standard deviation(σ)=105

Q: 10.. The achievement scores for a college examination are normally distributed with mean75 and…

A: the achievement scores for a college examination are normally distributed with mean = μ= 75…

Q: An original population of scores with a mean = 50 and SD = 6 is standardized to create a new…

A: given data  1 represents original population 2 reperesents new distributionμ1 = 50μ2 = 80σ1 = 6σ2 =…

Q: ominic would want to estimate the mean of a population which is normally distributed. The standard…

A:

Q: The mean IQ is 100 and the standard deviation is 15. What percentage of people fall between the IQs…

A: given  data, μ=100σ=15we have to find out the percentage of people

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 71…

A:

Q: If the standard error,  of a sample data set is 5 and the standard deviation,  of the distribution…

A: For a population with mean µ  and standard deviation σ, the standard error is σx̅ = σ/√n, where x̅…

Q: Suppose the test scores in a class are normally distributed with a mean of 70 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Assume that an intelligence test scores are distributed normallt with a mean of 100 and a standard…

A: Standard normal distribution: The standard normal distribution is a special case of normal…

Q: Assume that the test scores for a large class are normally distributed with a mean of 64 and a…

A: Solution-: Given: We find P(the class received a higher score than 78)=?

Q: In a large section of a statistics class, the points for the final exam are normally distributed,…

A:

Q: Suppose that the score on a reading test are normally distributed within a mean of 70 and a standard…

A:

Q: A division-wide aptitude test was conducted on 10 000 pupils. the mean of the test is 58 and…

A: Given, A division-wide aptitude test was conducted on N=10 000 pupils. The test, The scores also…

Q: the statistic X defined as X = 49S 2

A: (a) chi-square distribution with 49 degrees of freedom

Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…