If p=30% and n=220, find X. X= X Ś

Q: Find the area of the indicated region under the standard normal curve. Click here to view page 1 of…

A: Explanation: The area between Z = -1.5 and Z = 1 under the standard normal curve is =…

Q: In a laboratory experiment, a mouse can choose one of two food types each day, type I or type II.…

A: Disclaimer: " As per guideline we can only solve 3 sub-parts of a given question."

Q: A social psychologist wants to investigate whether stereotypes can be used to achieve positive…

A: Given information- We have given the paired t-test. Sample size, n1 = 12 Sample size, n2 = 12…

Q: A textile fiber manufacturer is investigating a new drapery yarn, which the company claims has a…

A: The population mean is 12, population standard deviation is 0.5, sample size is 4 and sample mean is…

Q: In an independent groups experiment, group A’s mean is 220 and group B’s mean is 180. The estimated…

A: given data x¯1= 220x¯2= 180σx¯1-x¯2 = 20t = ?

Q: 1. (a) (b) (c) Scores on a certain nationwide college entrance examination follow a normal…

A: given data normal distribution μ = 500σ = 100

Q: A grocery store's receipts show that Sunday customer purchases have a skewed distribution with a…

A: Given: mean = 35 standard deviation = 24 n=299

Q: The diameter of steel rods manufactured on two different extrusion machines is being investigated.…

A: Method: If p-value is less than the level of significance (alpha) . Then we reject the null…

Q: A teacher wants to see if a new unit on factoring is helping students learn. She has five randomly…

A: Here, scores of the student before and after test is taken. That is observations are paired.

Q: Below is a graph of a normal distribution with mean μ= 1 and standard deviation o=4. The shaded…

A:

Q: Regression analysis was applied between sales data (y in $1000s) and advertising data (x in $100s)…

A: The estimated regression line of y on x is given as: y^=12+1.8x. It is given that:…

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: We have given that  P(Z< z) = 0.8365

Q: QUESTION 3 If you rejected Ho at the 0.10 level of significance, then O you may reject it at the…

A: Method:  Reject H0 , if P-value is less than the level of significance.

Q: 4:36 < LTE2 46 Find the z-score such that the area under the standard normal curve to the left is…

A:

Q: When might you use one or the other?

A: Generally, both covariance and correlation are used to know about the linear relationship between…

Q: Interpret the coefficient for tenure in terms of percentage change in odds of churning (tenure is…

A: From the provided data, it can be seen that there are 30 independent variables in the logistic…

Q: Which of the following are true? (Select all that apply.) 1   An assumption of a linear regression…

A: consistent dispersion of the observations from the regression line is a assumption of linear…

Q: Consider the following Minitab display of two data sets: Variable N Mean SE Mean StDev Minimum Q1…

A: Variable  C1 N  = 20 Mean= 20 SE Mean= 1.62 StDev= 7.26 Minimum= 7 Q1=15 Median= 20 Q3 = 25 Maximum=…

Q: a) Find n for a 95% confidence interval for p with bound on the error of estimation (margin of…

A: given data  95% ci for p E = 0.04 (a) point estimate for p = 0.2 n= ?  (b) no prior estimate for p…

Q: IQ is known to be normally distributed with a mean of 100 and standard deviation of 16.  A small…

A: given data claim : μ= 100σ = 16n = 79x¯ = 97

Q: For the hypothesis test Ho:μ = 17 against H₁: μ< 17 with variance unknown and n = 11, find the best…

A:

Q: FRIES = 22.5 + 0.08*TRAFFIC + 9.1*COUPON? + -1.1*TEMP where FRIES is the number of pounds of fries a…

A: The regression model is given by,  FRIES = 22.5 + 0.08*TRAFFIC + 9.1*COUPON? + -1.1*TEMP   The…

Q: Please elaborate more on this i could not understand

A: We have to find E(E(X/Y=y)

Q: The least squares line ŷ =10 + 5x describes the following coordinates: (1, 15), (2, 20), (3, 25),…

A:

Q: .The lifetime of a certain kind of electric bulb may be considered as a RV with mean 1200 hours and…

A:

Q: What does the slope say about this relationship?       For every increase in X of 1, the…

A: The slope of a regression line interprets the change in the dependent variable for a unit change in…

Q: Construct the indicated confidence interval for the population mean μ using the t-distribution.…

A: Given  Sample size n=18, sample mean x̄=12.4, sample standard deviations s=0.76, level of…

Q: For the standard normal distribution shown on the right, find the probability of z occurring in the…

A: Required probability is P(Z&gt;-1.95)

Q: A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Given that, Mean (barx) = 715.3 Standard deviation (s) = 82.5

Q: Compute for the Pearson Product Moment Correlation Coefficient of the following data set. Interpret…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: UESTION 29 The average UQ student reports dedicating 8.5 hours per week to each 2-unit course.…

A: Given that, a group of 20 psychology students who study for a mean of 10 hours per week for each…

Q: A company has developed an online application for smart mobile phones, the users who installed the…

A: Given:-               Total user in 2017  =  987              Increase rate  = 15 %…

Q: A survey found that women's heights are normally distributed with mean 63.4 in. and standard…

A: Given information- We have given the data of men and women’s height Population mean of men’s height,…

Q: A population of values has a normal distribution with μ=231.3and σ=64. You intend to draw a random…

A: Given information- Population mean, µ = 231.3 Population standard deviation, σ = 64 Sample size n =…

Q: peop in a pa country are 32, 31, 22, 11. Assume that samples of size n=2 are randomly selected with…

A:

Q: What is the standard deviation of the following two scores: 120 and 140     10     100     20…

A:

Q: What combination of x and y will yield the optimum for this problem? Maximize $3x + $15y, subject to…

A: we find solution using graphical method  MAX z = 3x + 15y subject to 2x + 4y ≤ 12 5x + 2y ≤ 10 and…

Q: Nicotine Content of Cigarettes A manufacturer of cigarettes wishes to test the claim that the…

A: Claim: The variance of the nicotine content of the cigarettes is equal to 0.638. Null Hypothesis:…

Q: Which of the following data sets would have the smallest variance?       700      701      702…

A: The question is about measures Introduction : Variance - A variance is nothing but mean of sq.…

Q: Suppose that we check for clarity in 50 locations in Lake Tahoe and discover that the average depth…

A: From the provided information, Sample size (n) = 50 Sample mean (x̄) = 14 Sample standard deviation…

Q: In a study performed on comfort food eating during times of stress, it was found that mean rated…

A: The question is about effect size Given : Sample mean rated comfort food cons. level for a grp. of…

Q: You have a charge card. You receive a bill, dated June 5.  Your balance fluctuated during the 31-day…

A: Formula Used: Average = ∑FX∑F

Q: X opose Z = X + Y. Determine the probability density value at z = = 0, fz(0). swer:

A:

Q: D and E

A: Given  x denotes the time in hours of adults working in an organization μ = 1760 hoursσ = 380 hoursn…

Q: Scenario: Researchers were interested in how social situations can influence stress-induced eating.…

A: GivenThere are two factors in this scenario1. Eating Habits2. Social situations.

Q: Determine the upper-tail critical value to/2 in each of the following circumstances. a. 1-α=0.90, n…

A: upper - tail test we have to find out the critical value for the given data

Q: As the sample size increases, the... A. Standard deviation of the population decreases B. Sample…

A: given data  we have to find correct effect of increase in sample size.

Q: According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is…

A: From the provided information, Population standard deviation (σ) = 9 Sample mean (x̄) = 59 Sample…

Q: Determine whether the following graph can represent a variable with a normal distribution. Explain…

A: From the above graph we can see that, it is symmetric the mean =median= mode= 20 i.e. mid point of…

Q: Describe the sampling distribution of p. Assume the size of the population is 20,000. n = 200, p =…

A: