7. The standard deviation of standardized scores for all observations is..., if all values are transformed into standardized scores 8. When we throw a coin 180 times, appeared 99 times of (H),81 times of (T).Then P(T)is...

Q: Find the standard deviation of the given data rounded to the nearest hundredth. 3, 4, 5, 7, 10, 12,…

A: Given data is3,4,5,7,10,12,15sample size(n)=7

Q: For a population with the mean of u = 45 and a standard deviation of 10, what's the standard error…

A: Given that, Mean = 45 Standard deviation = 10

Q: Given that x is distributed normally with mean 74 and standard deviation 10, what is P(72 < x < 82)…

A:

Q: Suppose that the mean cranial capacity for men is 1090 cc (cubic centimeters) and that the standard…

A:

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: 2. The mean afternoon temperature in Quezon City for the month of April is 37°C and the standard…

A: The normal distribution related problems can be solved by using the standard normal z score method…

Q: To evaluate the effect of a treatment, a sample is obtained from a population with a mean of 30, and…

A: A) Use one-sample t-test for the population mean: Since p-value (0.1035) is greater than 0.05, it…

Q: If the average grade on an exam was 75% and the standard deviation was 4%, what would the three uper…

A: Empirical rule has  Upper limit  Mu +K. sigma

Q: 3. For a group of 100 candidates the mean and standard deviation of their marks were found to be 60…

A: Given: There are 100 candidates  mean of their marks = 60 Standard deviation of marks = 15 Wrong…

Q: 1. The scores on a test have a mean of 100 and a standard deviation of 15. If a personnel manager…

A: Formula : Z =(X - μ)/σ

Q: Suppose the data have a bell-shaped distribution with a mean of 40 and a standard deviation of 7.…

A:

Q: The IQs of 300 applicants to a certain college are approximately normally distributed with a Mean of…

A: The mean and standard deviation are given by μ=115,σ=12 The probability of getting a score more…

Q: I need help on subpart b - the standard deviation for stock x

A: Given Information: Stock X P(X) -60 0.1 20 0.2 110 0.4 170 0.3 Required: To compute…

Q: 7. If you made only n = 1 measurement of rack height, the standard deviation of the measurement…

A: Solution: 7. From the given information, n = 1.

Q: 8, and the sample standard deviation, s, is found to be 4.6. ...

A:

Q: 2. Information from the Department of Motor Vehicles indicates that the average age of licensed…

A:

Q: Suppose that in a given semester, the MEAN of units taken by students at Delta is 17 and has a…

A:

Q: Solve the problem  27.) If the life, in months, of a certain type of car battery is normally…

A: Solution: It is given that the life of a certain type of car battery is normally distributed with a…

Q: 2. The blood cholesterol levels of men age 55 to 64 are approximately Normal, with mean 222…

A:

Q: Nationally, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A:

Q: The values of the account receivable for a department store are normally distributed with a…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: 3.) The monthly incomes of teachers in a public school are normally distributed with a mean of…

A:

Q: 8. Claim: The standard deviation of pulse rates of adult women is at least 50. For the random sample…

A: Solution: 8. a. Let σ be the standard deviation of pulse rates of adult women.

Q: A set of data is found to have a sample standard deviation of 25. Suppose 9 were added to each of…

A: Given: s=25 9 is added to each of the values.

Q: 4) According to one pollster, 59 % of people are afraid of flying. Suppose that a sample of size 26…

A:

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

A:

Q: 6.21. For two observations 'a' and 'b', show that standard deviation is half the disto between them.

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: 1. If the standard deviation of the mean for the sampling distribution of random samples of size 36…

A:

Q: If the average American sleeps 8 hours a night, with a standard deviation of 1 hour, and I plan on…

A:

Q: A certain brand of laundry soap is advertised to have a net weight of 300 grams. If the average net…

A: Given : n=15 , X-bar=260  , s=28 , μ0=300 , α=0.01 Since , the population standard deviation (σ) is…

Q: In a course where the mean final exam grade is 68 with a standard deviation of 6.5, the grading…

A: The exam grade is the cutoff (minimum needed) for an A is obtained below:From the given information,…

Q: Assume blood-glucose levels in a population of adult women are approximately normally distributed…

A: The normal distribution  in the center are generally denser and basically less denser at tails.…

Q: 2. The heights of 1000 students are normally distributed with a mean of 174.5 cm. and a standard…

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Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: X follows a Normal distribution with mean = 35 and S.D = 7.5 Then z=(x-mean)/SD = (x-35)/7.5…

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

A: Confidence interval are used to estimate the interval where the true popualtion parameter can…

Q: If x is normally distributed with a mean of 5 and standard deviation of 2, find the P(x>8).

A:

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: From the given information, normal distribution with population mean as 35 and standard deviation as…

Q: For a population with mean 80 and standard deviation 10, what is the X value corresponding to z =…

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

A:

Q: If the average low temperature of a winter month in Rochester, NY is 18∘18∘ and the standard…

A: According to the Chebyshev's theorem, 1-(1/k²) of the observation fall within k standard deviation…

Q: - If a population with µ =72 and o = 8, the distribution of z-scores will have a mean and standard…

A: Given: Mean = µ = 72 Standard deviation = σ = 8

Q: Answer the following by using the z-table from class. People spend an average of 7 hours per day on…

A:

Q: Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15.…

A: Since the area corresponding to z-value 1.73205 is 0.958368 calculated by Excel command NORM.S.DIST…

Q: A researcher wishes to see if the average number of sick days a worker takes per year is greater…

A: From provided information, claim that the average number of sick days a worker takes per year is…

Q: 2. Imagine the daily high temperature in Toronto was recorded every day for 14 days in January, and…

A: As we are authorized to answer only question with maximum 3 subparts for each question and that you…

Q: Suppose that the mean cranial capacity for men is 1020 cc (cubic centimeters) and that the standard…

A: GivenMean(μ)=1020standard deviation(σ)=300By Using  68–95–99.7 rule:-68% data falls with in one…