Assume that the readings on the thermometers are normally idstributed with a mean of 0" and a standard deviation of 1.00°C Find P5, the 75th This is the temperature reading separating the bottom 75 % from the top 25 %. percentile.

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A: X follows a Normal distribution with mean = 51.6 and S.D = 2.5 Then z=(x-mean)/SD = (x-51.6)/2.5…

Q: A person in the U.S. eats about 25 pounds of M&M's per year with a standard deviation of 3 pounds.…

A: Given information Mean µ = 25 pounds Standard deviation σ = 3 pounds Z = -2

Q: The time for degree completion was record below. Years 4 6 5 6 5 8 Calculate the standard…

A: Calculation:The number of observations on time for degree completion (years) is, n = 6. Denote xi as…

Q: Suppose that the mean systolic blood pressure for women over age seventy is 131 mmHg (millimeters of…

A: Given that the mean systolic blood pressure of women over age seventy is 131mmHg with a standard…

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A:

Q: Carol-Anne is an environmental scientist studying the heights of red oak trees in a nearby marsh and…

A: It is given that the researcher randomly selected 10 red oak trees from each habitat and records the…

Q: Assume that weights of men are normally distributed with a mean of 160 pounds and a standard…

A: Given, Weights of men follows normal distribution with mean 160 pounds and standard deviation 25…

Q: Find the standard deviation (rounded to the nearest unit) for the data indicated

A: We have to find the standard deviation based on the given frequency distribution.

Q: The time (X) to complete a standardized exam is approximately normal with a mean of 70 minutes and…

A:

Q: represents the number of televisions in a household: x 0 1 2 3 P(x) 0.050.200.450.30 Find the…

A:

Q: Five hundred children participated in a field demonstration. Their heights averaged 110 cm with a…

A: Let X be a random variable such that X: Height of the children Since the sample is large (500)…

Q: For the given values ​​, calculate the standard deviation .

A: Given Data : For calculating the standard deviation, below table will be used    YY Y2Y^2 1 5…

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A:

Q: John wishes to estimate the population mean salary of college graduates who took a statistics course…

A: Solution: Note: Hello! As you have posted 2 different questions, we are answering the first question…

Q: Assume scores on an exam are normally distributed with a mean of 80 and a standard deviation of 5.…

A: It is given the mean and standard deviation are 80 and 5, respectively.

Q: *. The mean IQ is 100 points with a standard deviation of 15 points. a) What percent of the…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 15 X~N (100, 15) Here X is…

Q: A police radar gun is used to measure the speeds of cars on a highway. The speeds of cars are…

A:

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: The mean weight of a group of boys is 145 lbs, with a standard deviation of 4 lbs. If the weights…

A:

Q: A random sample of 49 shoppers showed that they spend an average of $23.45 per visit and the…

A: 1. Point estimate of the population mean is the sample mean.

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A: Given : Let, X = Wingspans of butterflies  X~N(μ=52.6,σ2=(2.9)2)  We want to find, (a)…

Q: The mean grade on a final examination was 72 and the standard deviation was 9. The top 10% of the…

A: Mean(µ) = 72Standard deviations (σ) = 9

Q: Answer the following by using the z-table from class. Roadworthy tires last an average of 30,000…

A: The provided information are: Population mean (μ) = 30,000 Population standard deviation (σ) = 2500…

Q: The monthly incomes of 16 students were analyzed and their average was 1000 TL and the standard…

A: Given data,μ=1000σ=200n=16z=2.7x=?

Q: The following graph portrays the distribution of the number of spicy chicken sand- wiches sold at a…

A: Empirical Rule: The percentage of values lies between one standard deviation from the mean is 68%.…

Q: Assume that Math test scores are normally distributed with a mean of 200 and a standard deviation of…

A: The provided information is  The mean and standard deviation is  µ=200 σ=40 P(X<120)=?…

Q: Find the standard deviation for the group of data items. Stems Leaves 3 4 16 16 The standard…

A:

Q: The distribution of head circumference for full term newborn female infants is approximately normal…

A:

Q: How large a sample is needed to estimate the population mean for the amount of money a person spends…

A: It is given that confidence level is 0.95, standard deviation is $7.50 and margin of error E is $2.

Q: A group of students take a exam and the adverage was m = 90 and the standard deviation was 7.8.…

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

Q: Suppose you scored 83, 77, 72, and 82 O on your four exams in a mathematics course. Calculate the…

A: The given scores are 83, 77, 72, and 82.We need to find the range and standard deviation of the…

Q: Assume that math test scores are normally distributed with a mean of 400 and a standard deviation of…

A:

Q: Find and Stondard deviation X. mean of

A: Let , the probability density function of X is given below, = 0 ; otherwise Our aim is to find the…

Q: A blood pressure test was given to 450 women ages 20 to 36. It showed that their mean systolic blood…

A: Given  that,             Mean, x¯=119.2 mm Hg            Standard Deviation, s=12.1 mm Hg a) To…

Q: What percentage of the widget Weights lie between 55 and 79 ounces when the mean is 61 and the…

A: We have to  given probability...

Q: You want to know the percentage of utility companies that earned revenue greater than 94 million…

A: Given Mean(μ)=60standard deviation(σ)=15

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a…

A: Solution: a. Let X be the wingspans of a group of monary butterflies. From the given information, X…

Q: Find the range and the standard deviation (correct to two decimal places). 84, 96, 104, 104, 107…

A: Obtain the value of range. The value of range is obtained below as follows:   From the information,…

Q: Suppose that the mean systolic blood pressure for women over age seventy is 132 mmHg (millimeters of…

A: Given mu =132 , sigma = 7 ( a )P ( 125<X<139 ) =? % ( B ) 99.7% lies between ? and ?

Q: THE STANDARD DEVIATION

A: Here given AN ENGINEERING STUDENT`SPENDS BETWEEN 5 MINUTES TO 15 MINUTES EATING HIS LUNCH.  Here use…

Q: A blood pressure test was given to 450 women ages 20 to 36. It showed that their mean systolic…

A: (a) In this question, it is given that Systolic blood pressure reading of 115.0 mm Hg, mean systolic…

Q: Determine the z-score, to the nearest hundredth, for a woman who had a systolic blood pressure…

A: We have given that  Mean systolic blood pressure = 119.5 mm Hg Standard deviation blood pressure =…

Q: Ten percent of the world's population is left-handed. A researcher claims that left-handed…

A: Given: n=900 and p=9%=0.09. a) The mean of p^ is μp^=p=0.09

Q: Rachael got a 670 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are…

A: Given that Rachael's score, X = 670 Mean = 600 SD = 30

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

A:

Q: In a normal distribution, it is found that the mean is 56 and the standard deviation is 5, Find the…

A: We want to find the range of the values

Q: Five hundred children participated in a field demonstration. Their heights averaged 110cm with a…

A:

Q: The average woman's height is 65 inches with a standard deviation of 3.5 inches. What proportion of…

A:

Q: Find the standard deviation for the group of data items. 5,5,5,5,7,9 ​(Simplify your answer.…

A: Solution:Computation of standard deviation:Standard deviation for the group of data items is…

Q: You want to know the percentage of utility companies that earned revenue less than 67 million…

A: