You have collected BMI data on a group of 30 college-age females. You are curious to find out how your sample’s average BMI compares to the national average. After a quick Google search, you discover that the national average BMI for college-age females is 22. Which t-test do you run to see if your sample is significantly different from the national average?

Q: Please help me figure out the T-Statistic

A: t stat=2.871

Q: Brink studied the effect of postural change on cardiovascular reactivity for a sample of healthy…

A:

Q: A department store has recorded the sales of the best selling can opener model during the last 6…

A: Given information: The data represents the observed values of the can opener sales for the last 6…

Q: A researcher uses a random sample of 200 people in prison in the United States to find that the…

A: Given information: Sample size, n = 200 people in prison. The sample proportion of the prison…

Q: A psychologist would like to determine if yoga will affect the number of headaches for chronic…

A: a. The data shows the training the number of headaches is measured before and after yoga class.

Q: t does a z-score of -3.8 mean

A: A z-score is known as the standard score that determines how much the data point deviates from the…

Q: In a recent election, 63% of all registered voters participated in voting. In a survey of 275…

A: The percent of participation of voters is equal to: In the given case; when the observation sample…

Q: Where do p-values concentrate?

A: Under the null hypothesis H0 about the unknown distribution of the test statistic, the p value is…

Q: For a class of 60 students, the marks obtained in last semester’s Accounting exam showed that the…

A: Given that third quartile, Q3 = 70 marks

Q: What is the percentage of scores that lie between a z score of -2 and a z score of 1?

A:

Q: Jeffrey thinks that students on the baseball team who drink Sporty brand sports drink score more…

A: In the given problem,  Jeffrey thinks that students on the baseball team who drink Sporty brand…

Q: .If you are at the 90th percentile in terms of GPA, then 90% of the sample has a lower GPA than you.…

A: Percentile : Percentile is the number such that certain percentage of data fall below that number.…

Q: Two reporters are both interested in finding the proportion of people in town who are unemployed.…

A: Two reporters are both interested in finding the proportion of people in town who are unemployed.…

Q: In the backward elimination process, what happened in the first step? How many steps are in the…

A: In backward elimination, it begins with a model containing all the independent variables of…

Q: A company that produces cranberries knows that about 7% of its cranberries are bruised in the…

A: It is given that the p-value is 0.004.

Q: Jasmine was good at statistics but not so good at verbal aptitude.  She got her SAT score report in…

A: we have to find out  the Z-score correspondingto 34th percentile .

Q: The male population of PU is 250 lakhs. The number of literate males is 20 lakhs and the total…

A:

Q: How do I solve for the mean, quartile 1 and 3?

A: To calculate the mean, median, mode, quartile 1 and quartile 2 of the given data, we should first…

Q: Your instructor has the Mid-Term examination grades. He told you that the 25th percentile is 51 and…

A: Given that, Your instructor has the Mid-Term examination grades. He told you that the 25th…

Q: What is the decision rule for the t-test that the mean child mortality rate for countries in Eastern…

A: It is tested that the mean child mortality rate for countries in Eastern Europe is more than the…

Q: What determines whether we use the z-test or the t-test?

A: Z statistic: Z=(X¯-μ)σ/n~N(0,1) with mean=0,variance=1   t statistic t=(X¯-μ)S/n

Q: Two reporters are both interested in finding the proportion of people in town who are unemployed.…

A: Two reporters takes separately random samples and tried to find out the proportion of unemployed…

Q: When do we add the two corresponding areas of the z-score

A: A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of…

Q: For LSD, how would you report your results? A LSD post hoc test (p < .05) revealed that the mean FIQ…

A: The p-value for the difference between group-1 and 2 is more than the 0.05 (significance level)…

Q: "Aiden receives a z score of -.3 on an exam that is normally distributed, what percentage of the…

A: Given : Aiden receives a z score of -.3 on an exam that is normally distributed.

Q: A research company has designed three different systems to clean up oil spillages. The following…

A: The claim of the test is to check whether the difference in the testing of effectiveness of the…

Q: Compare these two, does the number of cups of coffee has an effect on the general average of a…

A: Given information: The data represents the values of the variables x = Number of cups and y =…

Q: an IQ higher than 90% of the population was obtained by taking the webchers IQ test, what is the IQ…

A: Given: Population mean IQ score using Stanford Binet intelligence test μ = 100 Population standard…

Q: A sample of people attending a professional football game averages 13.7 years of formal education.…

A: Given information: A sample of people attending a professional football game averagesX¯=13.7 The…

Q: A graduate student in leisure studies wants to know the short-term effect of a 4-day bicycle tour on…

A: The different types of t test for two samples are: independent samples t test dependent samples t…

Q: Given this data and the R2 value being R2 = 0.446   How can you interpret the results of this…

A: The R2 is known as the coefficient of determination, The R2 measures how much variation in the…

Q: After the analyses, Rosalind found a significant difference in test scores between taking the test…

A: The results are different because it is likely that the test statistic value obtained by Rosalind is…

Q: on a 100 item test romel got a score of 88 which is the 9th decile what does it mean

A: Di = i * (n + 1)  10 th data

Q: How do calculate a z-score

A: In general z-score is the standard normal score.

Q: can you find p-value?

A: Here, we are willing to test if the unemployment rate for three regions are equal or not.  The…

Q: In a study at The Ohio State University, 16 student volunteers drank a randomly assigned number of…

A: Paired data: If the data comes from same observational unit, then it is called paired data.

Q: The athletic director at a large university compared the proportions of freshmen (1st year students)…

A: The hypothesis is, Null hypothesis: H0: There is no difference between proportions of freshmen and…

Q: An insurance company crashed four cars in succession at 5 miles per hour. The cost of repair for…

A: Give the data values $421 $465 $412 $218 Range definition: The difference between the maximum…

Q: Sixteen out of 35 high school seniors ran the mile in less than 6.25 minutes. At a=0.01, is there…

A: Solution: Give Total =60 X+ =35 remaing. X-=25 The test statistic is X = \min\{X^+, X^-\} =…

Q: The housing market in the Bay Area is absolutely insane! The competition for houses is sometimes so…

A: From the provided information, 236 of the 339 houses sold involved buyers paying over the asking…

Q: In the original experiment, the average for the treatment group was 0.8 higher than the average for…

A: On observing the shape of the histogram, it is approximately bell-shaped and follows the normal…

Q: At a research facility that designs rocket engines, researchers know that some engines fail to…

A: Identify the correct option for the most appropriate method to create the estimate.   The correct…

Q: According to Security Magazine, 83% of ransomware victims paid to restore access to their data.…

A: Given,

Q: A researcher wanted to study whether male customers give significantly bigger tips to waitresses…

A: Test is that whether male customers give significantly bigger tips to waitress wearing red. Note :…

Q: What does the P-value describe?

A: P value can be defined as the probability value for a given statistical model that null hypothesis…

Q: Is the flu making us sicker? A question of interest at the latest health summit was whether the…

A:

Q: What is the value of the t-statistic of the constant?

A: It is given that Coefficient of constant = 5.439236 Standard error of constant = 0.7981253

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: Find the technique for gathering data in the study below. An analysis of a sample of 31,000 patients…

A: