2- Given a x̅= 1, 000 and s= 100- you are taking a standardized test- what is the minimum score you need to rank in the top 5%

Q: Twenty-two different video games showing drug use were observed. The duration times of drug use ​(in…

A: Given: Sample size (n) = 22 Here, the test is conducted to check whether the population mean is…

Q: If your grade for your AMDM class is computed the following way: Homework – 10% Quizzes – 10% Tests…

A: the given table is Homework 10% Quizzes 10% Tests 60% Final exam 20% .

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Given  Margin of error=E=2.5%=0.025 80% confidence level then alpha=0.20 ,Zc=1.28 The no estimate of…

Q: A sample of n = 11 scores has a mean of M = 4. One person with a score of X = 16 is added to the…

A: The mean of11 scores is 4. The sum of the 11 scores is, Sum∑iXi=Mean×Number of scores=4×11=44

Q: If you have a z-score of 4.00 and the body proportion is .99997 and the question is asking for the…

A: The z-score is given by 4.

Q: An ad for seat belts claimed that proper usage of seat belts "reduces the chance of fatality in a…

A: Correct answer is  (A)

Q: A sample of n = 6 scores has a mean of M = 10. One score in sample is changed from X = 12 to X = 0.…

A: Given that, n = 6  mean of M = 10

Q: 4. Various state and national automobile associations regularly survey gasoline stations to…

A: In the given context, the population is all the gasoline stations in United States and the sample is…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: A sample with a mean of M=8 has an EZ= 56  how many scores are in the sample?   the number of…

A: Given that, Mean = M = 8 EZ= 56  n = ?   Definition of mean :  Mean is defined as sum of all…

Q: 43. What is the value of E(X - 2) for the scores: 1, 2, -2, 4, 5?

A: Here given that: Score( x) : 1, 2, -2, 4, 5 Make a table of x and (x - 2)  Then sum the column (x -…

Q: A sample of n = 7 scores has a mean of M = 16 to X = 20. What is the value for the new sample me

A:

Q: a. Roughly what percentage of z-scores are between -2 and 2? b. Roughly what percentage of z-scores…

A: Hi the question have more than 3 parts. As per the guidelines I am obliged to answer first 3 parts…

Q: In a population with σ = 5, a score of X = 46 corresponds to a z-score of z = +0.40. What is the…

A: Solution-: Given: X=46, σ=5, z-score=0.40 We find population mean (μ)=?

Q: 3. What raw score is needed to reach the 14th percentile?4. What range of raw scores makes up the…

A: 3. Here we have given percentile = 14% = 0.14SYbolically we can write it as,P(X < x) = 0.14where…

Q: Fourteen different video games showing drug use were observed. The duration times of drug use ​(in…

A: Given, n=14 df denotes Degree of Freedom.

Q: In a sample of n= 6 scores, five of the scores are each above the mean by one point. Where is the…

A: The mean of a data can be obtained as follows:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: Solution: From the given information, confidence level is 0.99 and E=0.01.

Q: 7. Selene got a score of 78. which is equivalent to 60th percentile rank in a mathematics test.…

A: Answer-7.   Selene got a score of 78.                    Which is equivalent to 60th Percentile rank…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: 1) what proportion of students scored above student 33 on homework 3? 2) what proportion of students…

A: Given:   Student ID HW 1 HW 2 HW 3 1 98 93 99 2 81 80 64 3 66 91 75.5 4 84 94 80 5 65…

Q: b. If the study had found that 51 of the 80 students were working then: ZSTAT =| (Round your answer…

A: Given sample size, n = 80 students population proportion of working = p = 0.48 51 of the 80 students…

Q: ave a data set of completely random data and I want to run 100 t-tests comparing riables. If I set…

A: Given: we are running the t test 100 times on a data set the p value is set to 0.05  therefore we…

Q: I dont have an example forthe problem question 22, so I am having trouble. Please help.

A: Introduction:Suppose a random variable X has mean μ and standard deviation σ.Let X = x be the cutoff…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A:

Q: s the newly hired manager of a company that provides cell phone service, you want to determine the…

A: It is given that margin of error (E) is 0.92 and the confidence level is 0.90.

Q: d. What percentage of terminals will last between 2.5 and 4.5 years? e. If the manufacturer…

A: Mean(µ) = 4 yearsStandard deviations (σ) = 10/12 = 0.83 yearX ~ N (µ, σ )= N(4, 0.83)

Q: Es. What is the lowest I.Q. score acceptable for the advanced training ?

A: Let X denote the IQ of army volunteers. Given that X follows N(mean = 110, SD = 10), then Z = (X -…

Q: A sample of n = 8 scores has a mean of M = 12. What is the value of  ∑X

A:

Q: (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are…

A: Given: μ=515, σ=110 The corresponding z-value needed to be computed: The probability that s scores…

Q: Mike must work at least 18 hours a week to supplement his income while attending school. He has the…

A: To solve the linear programming problem

Q: For a sample of 12 offenders convicted of weapons violations, the length of prison sentence in…

A: to find mean valuemean = sum of observations/ count of observationsmean = (6 + 6 + 2 + 12 + 36 + 48…

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

A:

Q: For worker 3, test the research hypothesis that the student is taking, in average, more than 15…

A: The data shows the time taking to solve walk-in problems.

Q: What is the minimum z-score that a data point could have in order to remain in the top 5%5% of a set…

A: P(Z>z0)=5%Using standard normal distribution table

Q: Mike must work at least 18 hours a week to supplement his income while attending school. He has the…

A: Let x denotes the number of hours working at store 1  and y denotes the number of hours working at…

Q: What proportion of the population score above an 18 on the ACT? What proportion of students score…

A: Given: Let X denote the SAT score thus, X~ N(500, 1002) Let Y denote the ACT score thus, Y~ N(20,…

Q: After three exams Denny has a mean score of 74 with only one exam remaining in the class what is the…

A: It is given that after three exams, Denny has a mean score of 74. To find: minimum score Denny has…

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A:

Q: What is the value of SS for this sample?

A: Given: n = 4  Σ X = 4 Σ X 2 = 32 The formula to calculate the SS is as follows:

Q: You are conducting a study to see if the proportion of women over 40 who regularly have mammograms…

A:

Q: 1. What percentage of scores fell within ±1 SD for ZADHD?

A: Introduction: The "ZADHD" values indicate the z-scores of ADHD.

Q: f you want to be 99​% confident of estimating the population proportion to within a sampling error…

A: p = 0.42 z-critical value at alpha(0.01) is 2.576. ME = 0.05

Q: A researcher wants to test whether UBC students are more intelligent than the general population. He…

A: Given: population mean (μ)=100population standard deviation (σ)=15sample size (n)=36Sample mean…

Q: Solve the problem. Round the point estiamte to the nearest throusandth.  6) Find the point estimate…

A: Let X be the people had hearing aids  n be the random sample Given X=20, n=304

Q: One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered "yes".…

A:

Q: On a psychological test with H = 88 and o = 12 , Carlo scores 8 points below the mean, Nick had a…

A:

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.