Your costs had been forecast as having an average of $138,000 with a Standard Deviation of $35,000. You have just learned that your suppliers are raising prices by 4% across the board. Now what are the average and standard deviation of your costs?

Q: B. The weights of crates of apples are normally distributed with a mean of 26.4 pounds and a…

A: Given: Population mean μ=26.4 Population standard deviation σ=3.1 Raw score (X) = 31.6

Q: If these data are converted to deviation scores, the last value (15) would have a value of Y 2 9 11…

A: Solution: The mean of Y is

Q: Suppose IQ scores are approximately normally distributed with a mean  of 100 and a standard…

A: Given, Mean =μ=100SD = σ=15

Q: As a mechanical engineer working for an automobile manufacturer, you conduct a survey and collect…

A: The given values are shown Table 1. The formula to find mean for any sample is, x¯=∑(xf)n (1) Here,…

Q: On a math exam, Joel had a score o 90, which was exactly 2 standard deviations above the mean. The…

A: Since, we only do up to three sub parts of a problem, we'll be doing the first three sub parts only.…

Q: On a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 90,…

A:

Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…

A: It is given that the mean is 10,000 and the standard deviation is 10.

Q: In another company, every worker received a 5% raise. How does this affect the mean salary? The…

A: Every worker received a 5%. The mean defines that the center or average of the data and it is…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: A score that is 12 points below the mean corresponds to a z-score of z =-1.50. What is the standard…

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: In a population with mean 50 what standard deviation score would have a score of X=45

A:

Q: What is the difference between deviation and standard deviation?

A: Before we know the difference between deviation standard deviation, we should know about both these…

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

A: Let "X" be the annual rainfall in Ferndale, California.

Q: The graphs below represent two distinct Standard Deviations from two separate samples.A) Which of…

A: Solution: A. From the graph on the left, it can be observed that the frequencies for all the scores…

Q: Suppose you were told you scored two standard deviation below the mean on a measure where the main…

A:

Q: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: When you use the standard deviation as a measure of variation, what is the reference point?

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

Q: What is another name for the standard deviation of the variable x? What is the reason for that name?

A:

Q: A student learns that on his most recent exam in psychology, the sample mean was 72.19 with a…

A:

Q: n the first quarter of 2019, the average home loan for first time buyers was R950, 000. Assuming a…

A: Given : In the first quarter of 2019, the average home loan for first time buyers was R950, 000…

Q: What was the cutoff for a failing score? Approximately what percentage of the students failed?

A: The scores on a psychology exam were normally distributed with a mean of 68 and a standard deviation…

Q: How does one calculate the standard deviation?

A:

Q: A study at the University of Colorado at Boulder shows that running increases the percent resting…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: he scores on a psychology exam were normally distributed with a mean of 65 and a standard deviation…

A: Given,μ=65σ=6

Q: If you score 76 on a commercial pilot exam that has a mean score of 70 and a standard deviation of…

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

Q: A distribution of exam scores has a mean of μ=80. If your score is X = 74, which standard deviation…

A:

Q: Looking at the test data, Jason saw that his score was a 2.5 with a mean of 79 and a standard…

A: We will find the actual score as following.

Q: Suppose you wish to invest money safely and are trying to decide between stock options in two…

A: Here We have to invest money any one of two companies . The average rates of rerurn are the same for…

Q: Which is better a score of 95 on a test with a mean of 70 and a standard deviation of 15, or a score…

A:

Q: 4. The average waist size for teenage males is 29 inches with the standard deviation of 2 inches.…

A:

Q: A quantitative data set has mean 19 and standard deviation 2. Approximately what percentage of the…

A: Given that, A quantitative data set with, Mean = 19 Standard deviation = 2

Q: If the mean of p hat equals 0.28 and the standard deviation of p hat is 0.07, what is the percent of…

A:

Q: Can you find the mean and the standard deviation?

A: To find the mean and standard deviation of the given data: Mean is the sum of observations divided…

Q: Jared has a mean of 74 on his quizzes, with a standard deviation of 7. On his most recent quiz, he…

A: If the z-score lies within 2 standard deviation away from the mean, then the score is not unusual…

Q: Explain Why can’t the value of the standard deviation ever be negative?

A: Standard deviation is basically the square root of the variance and variance quantifies the amount…

Q: on the first statistics exam, the class average was 70 with a standard deviation of 6. you scored an…

A:

Q: Suppose that Jett achieves a score of 1250 on the SAT, and his sister Kate scores 29 on the ACT. The…

A: Given information- For SAT scores- Population Mean µ = 1100 Standard deviation (σ) = 250 For ACT…

Q: A student scored 76 on a general science test where the class mean and standard deviation were 82…

A: For Science x¯=82s=8x=76 z=x-x¯s=76-828=-0.75

Q: As an electrical engineer, you have designed a new efficient light bulb. In order to predict its…

A: Formula  Used: Mean X = ∑FX∑F Standard deviation = ∑FX2-nX2∑F-1

Q: Suppose you have already calculated the mean, the average deviation, and the standard deviation of…

A: (a) Condition for Average Deviation: If the value of the observation is increased or decreased by a…

Q: Brian scored an 80% on a Chemistry Exam. The average on the exam was a 68%, with a standard…

A:

Q: If you get a sneak peak at the salary list of your job and realize you are in the lowest bracket,…

A: Let X= salary  Given that X follows a normal distribution with mean= 48000 and standard deviation =…

Q: When the correlation between x and y is –1.0, what will the standard deviation of errors be? Why is…

A: * ANSWER :-  Based on the above information the answer is  as follows

Q: Based on a survey, the mean weekly allowance of the Grade 11 students of XZY University is ₱750.00…

A: Solution:- from given information mean μ=750 standard deviation σ=100assuming the weekly allowance…

Q: If the coefficient of variation for a data is given as  35%, and the standard deviation for the same…

A: Given that Coefficient of variation, C.V =  35% And the standard deviation is SD = 32

Q: On an exam with u = 52, you have a score of X = 56. Which value for the standard deviation would…

A: We have given that µ = 52 x = 56 z-score formula is given as  z =( x - μ )/σ

Q: Find the standard deviation for this data set. if a one goal hockey game was added to this data set,…

A: From the plot representing the number of goals scored per game, there are three games in which three…

Q: What are all the values that standard deviation "s" can possibly take?

A: Standard deviation S=x1;x2n-1and ,Standard deviation is the positive squarew root of the variance…