Find two z values, one positive and one negative, that are equidistant (the same distance away) from the mean so that the areas in the two tails add to 10%.

Q: Find the proportion of N.d. observations with a zz-score between z1​= 0.53 and z2​= 3.11. Give your…

A: given data z1=0.53 and z2=3.11

Q: find out the mean profits:

A: We have to calculate the mean for given grouped frequency distribution of profits per shop.

Q: A sample of n = 4 scores has a mean of x̅ = 40, with a sum of squares of SS = 48. What is the…

A: Given that n=4, x̅ = 40 and SS=48 Consider, the variance, s2=SSn-1=484-1=16

Q: A sample of n=5 scores has a mean of x=9. what is Ex for this sample?

A: Mean = 9 n = 5

Q: Suppose f(x) = 0.125x for 0 < x< 4. determine the mean and variance of X. Round your answers to 3…

A: Solution-: We have, f(x)=0.125*x       ;0&lt;x&lt;4 We find the mean and variance of X

Q: Area =

A: Given : Area = 0.1314 We have to find the Z-score

Q: find the z-score that has 30.5 of the distribution's area to its left

A: Given, z-score = 30.5

Q: Find the z-score if the area to the right of z is .3523 and area to the left of –z is 0.3342.

A: Standard normal score: The standard normal score follows a normal distribution with mean 0 and…

Q: 2. 10, X = 7.8, s = 5.1, n= 10

A:

Q: Suppose f(x) = 0.125x for 0 < x < 4. determine the mean and variance of X. Round your answers to 3…

A: Given f(x)=0.125x for 0&lt;x&lt;4  We have to determine the mean and variance of X

Q: The area to the right of z-score of 0 is

A: We know that the Z is standard normal variate with mean 0 and variance 1  i.e. Z~N(0,1) Since the…

Q: In response to concerns about nutritional contents of fast foods, McDonald's announced that it would…

A:

Q: Find the z-score that cuts off 65% in the body on the left.

A:

Q: Find the critical t -value for a one tailed test with a = 0.05 and df = 2. Give your answer to…

A: Given, One tailed test  α=l.o.s.=0.05 d.f.=n-1=2

Q: between X and Y. If the variance of Z equals 0, then the value of r is - (round off to 2 decimal…

A:

Q: Find the mean value of y = x² - 7 over the range -2 < x < 2, and enter your answer as a decimal in…

A:

Q: Find the z-score which separates an area of 0.9000 on the right, from the remaining area on the…

A: According to the given information, we have P-value = 0.9000 Right tailed

Q: Suppose the data represent the inches of rainfall in April for a certain city over the course of 20…

A: Given Data: Q1=2.040Q3=5.960

Q: 29. Based on what you found in #26, what is the proportion of variability in X that can be explained…

A: The coefficient of determination which is sometimes called R squared is the measure of variability…

Q: A researcher reports an F-ratio with df= 2, 18 from an independent-measures research study. Based on…

A: It is an important part of statistics . It is widely used .

Q: Suppose f(x) = 0.20 for 0 <x < 5. Determine the mean and variance of X.

A: The objective is to find mean and variance

Q: A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the…

A:

Q: What is the symbol for the residual? R? None of the above / does not have a symbol

A: In the given problem, We need to write the symbol for residual.

Q: for a population with a µ = 60 and σ = 12 Find the z-score for an x value of 75

A: The mean is 60 and the standard deviation is 12.

Q: McDonald’s announced that it would use a new cooking oil for its french fries that would decrease…

A:

Q: If the z-score for a motel is 0.7, what is the price of a single room at the motel (in dollars)?

A: The formula for z score is, z=x-μσn In the formula, x is the individual score, μ is the mean, σ is…

Q: Find two z - values, one positive and one negative, that are equidistant from the mean so that the…

A: The areas in the two tails total 34%. The two z values are, Pz1&lt;Z&lt;z2=0.34 For,…

Q: S For n= 15, the margin of error for an estimate at an alpha level of 2% is +2.249 15

A:

Q: "A between-subjects ANOVA was found to be significant, with a SS-Between = 210.29 and SS-Within =…

A: Given: SS between = 210.29 SS total = 161.76 A sample measure of effect size is given by "η2=" (SS…

Q: Find the root mean square of y=1/x in the interval [1,3]. Round to the nearest hundredth. RMS =

A:

Q: Find the mean value if y 1+x² between x-0 and x-1

A: We have o find the mean value of the function :  y=11+x2 between x=0 ,x=1

Q: Find the 60th percentile of the distribution having pdf f(x)=|x|/4, where -2<x<2

A: Find 60th percentile

Q: Find two z values, one positive and one negative, that are equidistant from the mean so that the…

A: Introduction:The 100 (1 – α) % confidence interval for the population mean for given population…

Q: 4t mx(t) = 1- t?

A:

Q: Consider the data in the table in Ex 9.16. (photo attached)  Does the data provide significant…

A: It is given that the test statistic is 3.612 and the critical value is 1.76.

Q: A population is normally distributed with µ = 145 and σ = 20. Which is the percentile rank for X =…

A:

Q: The time a postal clerk spends with his or her customer has an exponential distribution with a mean…

A: In question, We have given that amount of time is following exponential distribution with mean 4…

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: Find the root mean square of y=1/x in the interval [1,3]. Round to the nearest hundredth. RMS

A: Given query is to find RMS.

Q: Find the variance

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

Q: What should we do with a small p-value?

A: The P-value is the probability we get the value of the test statistic, or something "more extreme"…

Q: Each person in random samples of 207 male and 263 female working adults living in a certain town in…

A: Given Information :  Each person in random samples of 207 male and 263 female working adults living…

Q: A population has µ = 50. Which value of σ would make X = 55 an extreme value out in the tail of the…

A: Given µ = 50 X = 55

Q: A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is added to the…

A: Given n = 5 mean = 12

Q: The approximate​ Z-score that corresponds to a right tail area of 0.42 is

A:

Q: 7)

A: Given that, n=10,SX=15SY=6SXY=20

Q: Find the proportion of N.d. observations with a zz-score between z_1 =z1​= -2.45 and z_2 =z2​= 2.71.…

A: Given Z1=-2.45 Z2=2.71

Q: The population mean will always be the same as the mean of all possible X that can be computed from…

A: Solution Ans is True

Q: In response to concerns about nutritional contents of fast foods, McDonald’s announced that it would…

A: Here, mentioned 97 out of 100 can't detect the difference in taste. Only 3 can detect. Means p=…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.