In a sample with M = 40 and s = 8, what is the z-score corresponding to X = 38? %3D

Q: You are considered to have an intellectual disability (ID) if you score in the lowest 2.5% of the…

A: Given data, μ=100 σ=15 P(X<x)=2.5%=0.025

Q: Blood pressure is 127.58 sample of 41 males,, 35-44 in age.. blood pressure of 5.76. Find 95% co…

A: Given: Sample meanx¯=127.58Sample size(n)=41Sample standard deviation(s)=5.76

Q: A sample with M = 85 and s = 12 is transformed into z-scores. After the transformation, what are the…

A: According to the sum, a sample with M = 85 and s = 12 is transformed into z-scores.M = sample mean=…

Q: A study found the lengths of daily driving time for people in your district are Normally distributed…

A: The mean is 35 minutes and the standard deviation is 3.

Q: 7x2 - 5x = 0 %3D

A: Topic:- calculus

Q: What is the z score of x=30 if x is three deviations to the left of the mean?

A: From the provided information, x = 30 and it is three deviations to the left of the mean.

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: A random sample of 5000 people was conducted to determine whether the proportion of Indiana…

A: sample size(n)=5000x=2773sample proportion()=population proportion(p)=0.57

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: The graph depicts IQ scores of 102 and 128, normally distributed with mean 100 and standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

Q: For a population with u =70 and o= 8, what is the z-score cor %3D corresponding to X= 82?

A:

Q: Find the z-score that has 70.9% of the distribution area to its right

A: We have the z-score that has 70.9% of the distribution area to its right

Q: An analysis of variance produces SSb = 30, SSw = 60, F-ratio with df = 2, 15.      For this…

A: From the provided information, SSb = 30 and SSw = 60 Degree of freedom (k - 1) = 2 And (n - k) = 15

Q: The data for the height of women is approximately bell-shaped. If a woman’s height has a z-score of…

A: Given that  Z-score is -1.3

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

A:

Q: If the t-statistic for a variable is -1.74, is the variable statistically significant?   No   Yes

A: If the t-statistic for a variable is -1.74, is the variable statistically significant? Explanation:…

Q: How did it resulted to 0.8749 at letter b? As I review the z-score table, z = -1.15 is equivalent to…

A: Actually you have seen the table for for left tailed side i.e. P(Z < -1.15)  But we have to solve…

Q: Find the​ z-score that has 72.9​% of the​ distribution's area to its right.

A: Here we have to find the​ z-score that has 72.9​% of the​ distribution's area to its right.

Q: a study was done involving data from all major US cities that compares the number of parks in each…

A: A study was performed based on the data from all major US cities that compares the number of parks…

Q: The sample mean x (with a bar above) is the best point estimator of the sample mean u(mu) True or…

A: Sample mean: The sum of the all observations of sample divided by the total number of observations…

Q: isn't it should use the normal table to find z value?

A:

Q: You are conducting a study to see if the proportion of voters who prefer Candidate A is…

A: P value calculates the possible chances of rejection of null hypothesis. * If p value is less than…

Q: The average exam score is 63 with a variance of 33.  Your exam has a Z score of 0.96. What is your…

A:

Q: A researcher wonders whether younger mothers have babies that are significantly heavier or lighter…

A: Suppose  is the population mean weight of babies of younger mother.It is needed to test whether the…

Q: "Aiden receives a z score of -.3 on an exam that is normally distributed, what percentage of the…

A: Given : Aiden receives a z score of -.3 on an exam that is normally distributed.

Q: You are conducting a study to see if the average male life expectancy is significantly less than 98.…

A: given data,claim :μ<98left -tailed test test statistics :z=-2.572p-value =?

Q: Will your flight get you to your destination on​ time? To the right are a histogram and summary…

A: Given data n = 72 x̅  = 24.5556 s = 3.34564 a) The correct option is All of the assumptions and…

Q: (d) What height corresponds to the 95th percentile in the Galton study?

A:

Q: Find an approximate z score corresponding to a percentile of 0.33 to its RIGHT.

A: The approximate percentile to the right of 0.33 is 0.67.

Q: In the same group of 20 students, GPA was measured before the semester and after the semester. What…

A: It is given that GPA was measured before the semester and after the semester.

Q: You are conducting a study to see if the mean weight of goats (in pounds) is significantly more than…

A: Claim :  The mean weight of goats (in pounds) is significantly more than 88 Hypothesis : It is one…

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Q: score of x=14, which value for the standard deviation would give this person the highest position in…

A: We have given that µ = 52 x = 14 z-score formula is given as  z =( x - μ )/σ

Q: Find the variance

A: Given : X~N(0, 7)

Q: the statistic X defined as X = 49S 2

A: (a) chi-square distribution with 49 degrees of freedom