8. Which type of association would you expect between number of hours studied for a test and the score on the test? *

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: 60 people are  surveyed  in new  york city .Out of the  60 , 43 people have  corona  infection…

A: Given, Total no. of people surveyed=60 No. of people having corona infection=43 No. of people tested…

Q: A pearson test statistic of .876 with a criticial valur of 0.361 would suggest what:   A.…

A:

Q: A researcher is interested in factors related to academic performance of students.She hypothesized…

A: Given: Number of categories of academic majors (c) = 4 Test value = 2.75 p value = 0.283

Q: % of students entering four-year colleges receive a degree within six years. Is this percent smaller…

A: We have given that  Sample size n = 277 Favorable cases x = 141 Sample proportion p^=x/n

Q: The manager of Carrefour selected samples of 64 customers and computed the sample average amounts…

A: Given: Sample size, n = 64          If the average amount spent is normally distributed then we are…

Q: There (Choose one) venough evidence to conclude that the mean FICO score is more than the cutoff of…

A:

Q: What information is provided by the sign (+/–) of a z-score? What information is provided by the…

A: Let, the dataset scores have a mean µ and standard deviation σ. Then the z score of a given score ,…

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,573 boys were born…

A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35…

A:

Q: 6. To test the claim that the proportion is less than 0.25, you would use a -tailed test.

A:

Q: Is veganism more common than it used to be? In 2012, it was reported that 2% of Americans were…

A: The random variable adults living in the United States in 2019 who are vegan follows normal…

Q: Suppose there are 30 students in a class. the18 male students in the class have a mean score of 72,…

A:

Q: 4. The bad debt ratio for a financial institution is defined to be the dollar value of loans…

A: The single mean t-test is used to compare the mean of a variable in a sample of data to a…

Q: 9. At a 1% level of significance, does college academic grade depend on the high school SAT result…

A: Given:   SAT   Acad. Grade Low Average High Total Low 13 25 21 59 Average 18 31 38 87…

Q: 17. What is the z-score that corresponds to P = 0.9131?

A: Solution: 17) Let Z be the standard normal variable with mean μ=0 and standard deviation σ=1.…

Q: Miller Junior High is considering changing its school colors.  The results of a survey that 16 out…

A: Topic : unitary method

Q: Determine whether the study is an observational study or an experiment. Explain. In a survey of 1321…

A:

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

Q: The scores of a random sample of 8 students on a physics test are as follows: 60, 62, 67, 69, 70,…

A: a. Since the population standard deviation is unknown and the sample size is small, the appropriate…

Q: A research scientist wishes to test the claim that the mean number of children per classroom in…

A: Suppose xi, (i=1,2,...,n) be the random sample of size n taken from the normal population with mean…

Q: - Suppose the Department of Energy in the Philippines surveyed 200 gasoline stations to determine…

A: a)In the given case, gasoline at all the gas stations is the population whereas the gas stations…

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given Information: Hypothesized value of population proportion p0=0.08 Sample size n=321 Out of…

Q: The mean score on a set of 24 tests is 83. What is the sum of all the test scores?

A: Mean is the average value of the case. Mean score is the ratio of sum of all scores and number of…

Q: 41. A student calculates the value of r as +0.72 for a question comprising 5 Pars of observations…

A:

Q: 50, the mean number of partners reported was 1.049 (sd=1.89). Is it reasonable that the mean number…

A: here sample size  = 3636         sample mean  = 1.049         sample standard deviation = 1.89 here…

Q: The mean annual salary of (public) classroom teachers is $55.4 thousand. A hypothesis test is to be…

A: Claim: The mean annual salary of classroom teachers in Ohio is greater than the national mean That…

Q: A Marketing Manager wanted to determine if there is a significant difference in the monthly sales…

A: We need to test whether there is significant difference in sale of the three sales or not…

Q: 1. Devonte' Graham joined the Charlotte Hornets as rookie for the 2018-19 season and put up a…

A: Given Data: X=31       n=73 Let θ be the three point percentage Null and Alternate Hypothesis: H0:…

Q: What would be the correlation between the annual salaries of males and females at a company if for a…

A: since, man always made $5000 more than women, so if we increase or decrease men salary by x amount,…

Q: (b) 57 houss of A pasticipant, Janceel, had his -Score? Sleep per uweelk . what ū z-Scose? (0)…

A: Given that,  Sample size (n) = 40 At 95% confidence intreval.  Lower limit = 42 Upper limit = 54 Z…

Q: II. Among 250 employees, of the local office of an international insurance company, 182 are whites,…

A:

Q: State the null and alternative hypothesis if I claim that the mean age of women is 5 or more than…

A: Solution: It is required to state the null and alternative hypotheses. The given claim is that the…

Q: A substance abuse counselor wants to demonstrate the effect of situational stress on alcohol…

A: Introduction: Denote μ1, μ2 as the true mean measures of alcohol rating, as given by the group of…

Q: A consumer agency wants to determine which of two laundry detergents, A or B, cleans clothes better.…

A: Given information: The given randomization dot-plot is based on 200 simulated samples.

Q: 29. What is the z-score corresponding to P84 z = three decimal places

A:

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25…

A: The provided information are:

Q: What is the relationship between the population mean and the mean of the distribution of sample…

A: Mean is the avg. of the given numbers.

Q: Is the number of runs scored by a baseball team during a season quantitative and discrete?

A: Discrete random variable: A discrete random variable takes the countable number of real values. This…

Q: What information is provided by the sign (+/−) of a z-score? What information is provided by the…

A: The Z-score is given by: Population: Z=X-μσ,Sample: Z=X-Xs .

Q: The recidivism rate for convicted sex offenders is 11%. A warden suspects that this percent is…

A:

Q: A car wash is assessing the average wait time for its customers. The median wait time is 4 minutes.…

A: When we talk about median , it is the middle number in a sorted, ascending or descending, list of…

Q: Determine the test score of John in Statistics if he has a z-score of 1.9. (SD = 4, mean = 85)

A: Given that in statistics, John has z-score of 1.9 where mean score is 85 and SD is 4. Here, to find…

Q: 9. Frequency of clients that wait less than 20 minutes 10. Percentage of clients that wait less than…

A: A frequency distribution is a tabular, listed or graphical representation of data that shows the…

Q: . NCAE shows that the average score of the students is 80 and sd is 15.  What is

A: From the given information, μ=80σ=15

Q: The weights in ounces of a sample of running shoes for men and women are shown. If we want to test…

A: The mean significance is tested for the larger population by taking samples into accounts using the…

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: Given information- Sample size n = 9 Mean Md = 14 SS = 1152 So,

Q: A clinical psychologist took a sample of four people from the population of people with anxiety…

A:

Q: I dont understand how to find a z score in statistics in psychology

A: Solution: Let X be the random variable.

Q: One sample has a mean of M=8 and a second samplehas a mean of M=16. The 2 samples are combined into…

A: Given data M1 = 8 M2 = 16 n1 = 3 n2 = 5