1. The mean score of 50 male students in mathematics was 78.95, with a standard deviation of 11.23 while that of 53 female students was 85.11, with standard deviation of 15.36. Test the significant difference of the performance of the groups in mathematics alpha = .05 level of significance

Q: 4. Consider that in a population of Filipino adults ages 18 to 65, Body Mass Index (BMI) is normally…

A: Given: X~N(μ,σ)μ=28σ=6

Q: Suppose that shoe sizes of American women have a bell-shaped distribution with a mean of 8.47 and a…

A: Empirical rule: The probability that the observation under the normal curve lies within 1 standard…

Q: The scores on a psychology exam were normally distributed with a mean of 50 and a standard deviation…

A:

Q: If a set of data is normally distributed with a mean of 50 and a standard deviation of 5, a z-score…

A:

Q: If grades on a certain test are approximately normally distributed with a mean of 75 and a standard…

A:

Q: For a population with mean 80 and standard deviation 6, what is the z-score corresponding to X = 68…

A: Given :Population mean u=80Standard deviation σ=6X=68

Q: 3. Suppose the mean blood glucose of a population of adults is 162 with a standard deviation σ=58.…

A: Given that, n=36,μ=162σ=58 The mean and standard deviation of sample mean is,

Q: If grades on a certain test are approximately normally distributed with a mean of 75 and a standard…

A: The random variable X is defined as the grades on a certain test follows normal distribution with a…

Q: The following are the average grade of 20 students: 1. What is the mean, variance and standard…

A: As per our guidelines we are suppose to answer only three subparts Given data is…

Q: at one college, GPAs are normally distributed with a mean of 3.1 and a standard deviation of 0.4.…

A:

Q: For a population with mean 90 and standard deviation 10, what is the z-score corresponding to X =…

A:

Q: Suppose that the annual rainfall in Ferndale, California, is known to be normally distributed, with…

A: P(X>x)=2.1% x=?

Q: A z-score of −1 tells us that a score fell one standard deviation below the mean in a group of…

A: Empirical rule: For a normal distribution, the approximate values that fall in the specified…

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

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: 1. On a final examination in Mathematics, the mean was 76 and the standard deviation was 5.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 2. Given a standard deviation of 3.7, what is the mean if1 0% of the population has a distribution…

A: We have given that,  Let x be the random variable from normal distribution with standard deviation…

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: deviation

A: Let X = IQ of an individual. IQ of the ruling species is normally distributed with a mean of 118 and…

Q: A large retailer wants to determine whether the mean income of families living within two miles of a…

A: Denote μ as the population mean income of families living within two miles of proposed building…

Q: The scores on a standardized mathematics test for 8th grade children in New York State from a normal…

A: Obtain the standard z-score for the random variable X equals 75. The standard z-score for the random…

Q: 10. A measure of the right atrial pressure (mm Hg) was made for cardiac patients who were given…

A: The appropriate test statistic to conclude the indifference between the mean right atrial pressure…

Q: Suppose a random sample of 25 measurements was taken from a population with a mean of 74 and a…

A: We know that,  Sample size (n) = 25 and population mean (μ) = 74 and population standard deviation…

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given that                  We have to find  (a) The question of interest is whether the mean…

Q: For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score…

A: We have to find z score..

Q: 1. Assume that the IQ scores of SHS students in The College of Maasin follow a normal distribution…

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Q: Suppose the distribution of maximum monthly January temperatures in Canberra is normal with mean, μ…

A:

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 67…

A: From the provided information, Mean (µ) = 67 Standard deviation (σ) = 6 Let X be a random variable…

Q: If a sample of 144 male weights has a mean of 266 pounds and standard deviation of 32 pounds. The CV…

A: Given data Mean (x̅ ) = 266Standard deviation (s) = 32Coefficient of variation(CV) for sample is…

Q: Suppose that that the average BMI of the patients at Beth Israel Deaconness Medical Center is 30…

A:

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

A:

Q: 19. If the mean is 19 and a standard deviation is 3.7 for a normally distributed variable, what is…

A: Here we need to find the z score corresponding to 14.9.

Q: For a population with population mean 80 and standard deviation10, what is the z-score corresponding…

A:

Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: 4. On a standardized test, scores are normally distributed with a mean of 400 and a standard…

A: GivenMean(μ)=400standard deviation(σ)=80

Q: For a population with mean of 50 and a standard deviation of 8, what is the Z-score that corresponds…

A: Given:  population mean of random variable x is =50 and standard deviations=8  then find z score…

Q: 2. If the heights of a male youngsters are normally distributed with a mean of 60 inches and a…

A:

Q: 1. A researcher suspects that the actual prevalence of depression among children and adolescents is…

A: Note:If the critical value is 1.645 instead of 1.96 in option A, then that will be the correct…

Q: Suppose Stock A has had a mean price of $6.58 per share with a standard deviation of $1.88, and…

A: GivenFor stock A:-Mean(μ)=6.58standard deviation(σ)=1.88For Stock B:-Mean(μ)=10.57standard…

Q: If you draw a sample of size 10 from a population of size 35 with a population mean of 83.4 and…

A: In question, Given that you draw a sample of size 10 from a population of size 35 with a population…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 65…

A: Given information- Mean, μ = 65 Standard deviation, σ = 4 a) The percentage of scores that were…

Q: 7. A set of data is normally distributed with a mean of 74. If the z-score corresponding to a value…

A:

Q: 2) The time it take Claudia to drive to work is normally distributed with a mean of 46 minutes and a…

A: The time it take Claudia to drive to work is normally distributed with a mean 46 and standard…

Q: The mean ACT score for 43 male high school students is 21.1 and the standard deviation is 5.0. The…

A: From the given output use the p-value to make your conclusion.

Q: When samples of size 25 are collected from a normal population that has a mean of 100 and a standard…

A: Given, n = 25 μ = 100σ = 20       To find, Sampling distribution of standard deviation?

Q: 4. A normally distributed set of 1,010 values has a mean of 103 and a standard deviation of 12.…

A:

Q: In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national…

A: Given that M =62.60,μ=63.80,σ=2.66,n=25 (2) The value of effect size Cohen’s d is, Thus, the value…

Q: Suppose that the scores on a statewide standardized test are normally distributed with a mean of 69…

A: Let X denote the scores on a statewide standardized test and it follows normal distribution with…

Q: A statistics professor announces that 15% of the grades he gives are As.  The results of the final…

A: Solution:From the given information, mean score is 83, standard deviation is 6. The fifteen…

Q: 1.) It is claimed that the average performance of newly graduated nurses from the recent board exam…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: at one college, GPAs are normally distributed with a mean of 3.1 and a standard deviation of 0.4.…

A: Let "X" be the GPA of college students. According to the empirical rule [Also known as 68-95-99.7…