A researcher wants to test whether UBC students are more intelligent than the general population. He knows that the general population has an average intelligence score of 100, with sigama = 15.

Q: If there were 760 students in Jamal’s class, approximately how many students scored higher than…

A: The probability that z-score is greater than 1.41 is calculated as follows: PZ>1.41=1-PZ≤1.41…

Q: Find the raw score which corresponds to z=1.6?

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: For country C n=1024,p hat =0.45 For country D n =1078 ,p hat = 0.41

Q: ) Danny has scored 78, 74, and 72 on the first three exams in his math class. If the standard…

A: Calculate total marks obtained in 3 exam

Q: A survey of 62 men found that 12 have a social media account. Another survey of 57 women found that…

A: Men are taken as group 1. Women are taken as group 2.   Given: n1=62x1=12n2=57x2=40α=0.07

Q: The manager wants to rank the five employees based on performance with number of errors weighted…

A: Note: As per the guidelines, in case of multiple questions, answer to the first question will be…

Q: For a population with μ = 80 and σ = 10,what is the X value corresponding to z = -0.50?

A: Given information Mean (µ) = 80 Standard Deviation(σ) = 10 Z = -0.50 Z-score is given by the…

Q: In most research, what does the p-value have to be for results to be considered statistically…

A: Here we want to know correct option.

Q: For a population with  σ = 8,  X=13 and a z-score = 2.21, find the value of µ

A:

Q: Three-fourth of the students in the class have an average lQ of 120 and the rest have an average IQ…

A:

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: An industrial/organizational psychologist wants to improve worker productivity for a client firm,…

A: Given; legal professions(n)=250 mean response=2.7 hours standard deviation(sd)=4.5 hours Estimated…

Q: On a psychology exam withµ= 76 and o = 12, Tom scored 9 points below the mean, Mary had a score of X…

A: From the provided information, Mean (µ) = 76 Standard deviation (σ) = 12 X~N (76, 12)

Q: A cognitive psychologist working in the area of suggestion asked a sample of children to solve as…

A: c)The degree of freedom=n1+n2-2=7+7-2=12   Then, at α=0.05, the critical value of t is 1.782.

Q: A man has an adopted grandson. After examining him at his 2-year checkup, the boy's pediatrician…

A: For a variable, X~N(μ,σ2), the z-score is, Z=X-μσwhereμ=population meanσ=population standard…

Q: Travis took the ACT (μ=19.50,σ=7) and recieved a percentile of 67. What was his z score? What was…

A: you had not provided distribution of sat score so we can not find answer of c.

Q: In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10…

A: Given: Sample size of subjects (n) = 330 Sample proportion or success rate p^=0.971 Hypothesized…

Q: An industrial/organizational psychologist wants to improve worker productivity for a client firm,…

A:

Q: higher

A: Given: Sample size, n = 54 Sample mean, sm=29 Standard deviation, s=7.8 Suppose, level of…

Q: A Correctional Psychologist wants to compare the number of criminal convictions of Persons Deprived…

A: Given information: The data represents the values of the variables number of criminal convictions,…

Q: The test statistic for the rhino data, x^2= 3.85, suggests that:

A: Given that, The test statistic for the rhino data, x^2= 3.85,

Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: How would you interpret a z score of ‐3.0?

A: To finde z score we need mean (mu) and standard deviation (sigma) of the sample. We Calculate z…

Q: A recent polls show that 61% of adult Americans are comfortable with the legalization of marijuana,…

A:

Q: Carter conducted an experiment to see how many people who passed by him at the park were wearing…

A: Given,          Carter conducted an experiment to see how many people who passed by him           at…

Q: If there were 500 students in Jamal’s class, approximately how many students scored higher than…

A:

Q: A study of damages awarded by judges in civil cases such as injury, factory liability, or medical…

A: Mean is defined as the simple mathematical average computed by dividing total observations by the…

Q: The trunk diameter, in centimeters, of a certain variety of pine tree is represented by X~N(150,…

A: We have to find out the z-score for a tree with a diameter of 170 centimeter..

Q: What is the value of ΣX2 for the scores 2, 4, and 5?

A: The scores are given as 2, 4, and 5.

Q: If the average of z and 5z is 30, what is the value of a?

A: Given that avarage value of z and 5z is 30.

Q: To assess the quality of recent research, which of the following question can be asked?

A: Need to check the quality of the research. Time and money are the factors which are important in…

Q: In a class in which the final course grade depends entirely on the average of four equally weighted…

A:

Q: The seniors in my math classes were asked about whether they would pay for either a senior trip or a…

A: The question is about categorical data analysis Given :   To test : A senior trip is more popular…

Q: In many states, a 17% risk of a car accident with a blood alcohol concentration of 0.08 is the…

A: Since, it is given that in many states, a 17% risk of a car accident with ablood alcohol…

Q: To get a grade of C + , a student must have a mean average of 77 or greater. Jim has a mean average…

A: Jim has mean average of 76 for 10 quizzes. i.e. Jim has scored total of 76×10=760, combining all 10…

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: Why does the use of multiple t tests increases?

A: The multiple t-tests are defined for a one-sample multivariate test and as well as for two samples.…

Q: Define If the actual Y score was 31, but the predicted score was 28, then the error of prediction is…

A: The formula for the calculation of the prediction error is given below:

Q: The percentage of scores falling below a z-score of .65

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: It is bleieved that the percent of convicted felons who have a history of juvenile deliquency is…

A: Solution: State the hypotheses Null hypothesis: That is, the percent of convicted felons who have a…

Q: A set of n = 10 pairs of scores has ΣX = 20, ΣY = 30, and ΣXY = 74. What is the value of SP for…

A: It is given that ΣX = 20, ΣY = 30, and ΣXY = 74.

Q: Sean also took the SAT (μ=1010,σ=200) and had a z score of +0.25. What was his SAT raw score? What…

A: Given data, μ=1010 σ=200 z-score=0.25

Q: A nursing school professor is interested in determining how her college students compare to the…

A: Let X denote the exam score, then assuming that X is normally distributed with mean, µ = 100 and a…

Q: A survey shows that 3 out of 4 of those drink coffee in a town with a population is 7900 adults how…

A:

Q: (d) How high a score must you have in order to be in the top quarter of the population in social…

A: (d) The high score for order to be in the top quarter of the population in social insight is,…