1. Studies have shown that gasoline use for compact cars sold in the United States is normally distributed, with a mean of 36.5 miles per gallon (mpg) and a standard deviation of 5.5 mpg. What percentage of compacts get 35 mpg or more?

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: Companies who design furniture for elementary school classrooms produce a variety of sizes for kids…

A: Given that, Mean = 39.2 Standard deviation = 1.9 Let X follows Normal distribution with mean 39.2…

Q: Suppose the heights of 10-year-old boys in the US vary according to a normal distribution with a…

A: The objective of this question is to find the percentile of a boy with a height of 140 cm given that…

Q: Medical research suggests that systolic blood pressure in adults is approximately normally…

A: Denote X as the blood pressure in adults. It is given that X is approximately normally distributed,…

Q: Compute the Pearson Correlation Coefficient for these data. r =  The correlation is: Medium and…

A: Correlation: The correlation value is obtained using EXCEL. The software procedure is given below:…

Q: A study found out that for a particular area, the average income per family is $24596 and the…

A: Solution

Q: A particular fruit's weights are normally distributed, with a mean of 539 grams and a standard…

A: Given data,normal distribution μ=539σ=22the haviest 17% of fruits weightg more than grams =?

Q: Suppose the life span of a brand of lightbulbs is normally distributed with a mean of 2000 hours and…

A: It is given that  Mean, μ = 2000 Standard deviation, σ = 320 Z-Score, Z = ( X - μ )/σ

Q: The mean height for women in the United States is approximately 64.5 inches with a standard…

A: Formula : Z =(X - μ)/σ

Q: The effect size is a measure of the magnitude of a treatment effect in standard deviation units.…

A: Given that, The effect size is a measure of the magnitude of a treatment effect in standard…

Q: A large company has many employees and the annual salaries of those employees follow a normal…

A: X follows a Normal distribution with mean = 70000 and S.D = 12000 Then z=(x-mean)/SD =…

Q: A particular fruit's weights are normally distributed, with a mean of 772 grams and a standard…

A:

Q: Given the mean of a normally distributed data set is 25, with  standard deviation of 5, what percent…

A: We will standardize the normal variable and then use standard Normal table to find the required.

Q: Salaries for Macdonald's workers are normally distributed with a mean of $30,000 and a standard…

A: Given: μ=30000 and σ=5000. From the given information:PZ<z=95%⇒PZ<z=0.95

Q: Consider the variable, type of birth control practiced (e.g., an IUD, condoms, none, etc). Which…

A:

Q: The cost of repairs for a fleet of motorcycles follows a normal distribution, with a monthly average…

A: Given Information: Mean value (u) = $ 1280  Standard deviation (s) = $ 420

Q: What level of measurement do the variance and standard deviation assume?

A: Variance and standard Deviation tells about the spread or variation in the dataWe calculate the…

Q: percent of men meeting these height requirements.

A: Assume that the heights of American men are normally distributed with a mean of 69.0 inches and a…

Q: 1. The standard deviation provides an overall measurement of how much participants' scores differ…

A: Given data: The standard deviation provides an overall measurement of how much participants' scores…

Q: Suppose you organized a​ 10-kilometer race in which the times were normally distributed with a mean…

A: Let X be any selected finishing time. Here, we have to find the percentage of runners took longer…

Q: Based on data from a​ college, scores on a certain test are normally distributed with a mean of 1531…

A: mean = 1531  a standard deviation = 324

Q: Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266…

A:

Q: A person records the speeds of various cars as they drive past their house. After 100 readings, the…

A: Given,mean(μ)=23.84standard deviation(σ)=3.56

Q: standard deviation 0.9 minute. What proportion of the time does Mrs. Starnes finish an easy Sudoku…

A: It is given that  Mean, μ = 5.3 Standard deviation, σ = 0.9

Q: population, it was found that the diastolic blood pressure is normally distributed with a mean 81.5…

A:

Q: Suppose that the heights of 4-year old boys are normally distributed with a mean of 103cm and a…

A: Let X be the random variable from normal distribution with mean (μ) = 103 cm and standard deviation…

Q: Suppose the heights of women at a college are approximately Normally distributed with a mean of 65…

A: The objective of this question is to find the height that corresponds to the 40th percentile in a…

Q: According to survey data, the distribution of arm spans for females is approximately Normal with a…

A: Mean (µ) = 65.3Standard deviation (σ) = 3.4The distribution of arm spans for females is…