Describe the four cases of the Leading Coefficient Test.

Q: How to Converting to z Scores is done?

A:

Q: When do you need to calculate and use a Z - Score? What are the assumptions when you use a Z score?

A: We have to find need of calculate and use of z score..

Q: Candidate T wants to determine if there is a difference in his popularity between men and women.  To…

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: Illustrate the Test R2 for significance?

A: Coefficient of determination: The coefficient of determination (r2) is the percentage of total…

Q: Explain why we have N1 + N2 - 2 degrees of freedom when we pool the variances. (In other words, why…

A: Degrees of freedom are nothing but the free choices available to the researcher to be made or degree…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: Given Information: Proportion p=0.77 Sample size n=50 Out of which x=33 records involved an…

Q: A software company is interested in improving customer satisfaction rate from the 60% currently…

A:

Q: how do you find the variance

A: Variance:Variance indicates by how much each observation differs from a central point represented by…

Q: What is a? What is the power of the test?

A: Rejection region is that sum of Xi's less than or equal to 4 when the sample size is 4.

Q: No, less likely

A:

Q: The sports coaches at West High School believe that 12% of their students play soccer. In a sample…

A: Given that Sample size n = 155 Number of students who play soccer, X = 21 Claim : 12% of students…

Q: A software company is interested in improving customer satisfaction rate from the 59% currently…

A: Given that  n=161 , X=104 , p0=59%=0.59

Q: what is the z score formula and and reverse z score formula ?

A:

Q: . What is the p-value?

A: here given  Sample mean  = 24 mph  Sample standard deviation  =  2.2 mph  Sample size  = 14  here…

Q: A software company is interested in improving customer satisfaction rate from the 78% currently…

A: Givenp=78%=0.78x=108n=132p^=xn=108132=0.8182

Q: What is p value ?

A: The​ P-value is the probability of observing difference in the sample statistic this high or higher…

Q: What is the power of a test?

A: Power of test is the probability of rejecting the null hypothesis when it is false. Therefore, the…

Q: Why is SSA called the ambiguous case?

A: SSS is a triangle in which side and an angle opposite one of them are given. such a case  is called…

Q: A software company is interested in improving customer satisfaction rate from the 74% currently…

A: Z-Test:  Here the hypothesis test is for the population proportion. The test statistics compared…

Q: How are power, alpha, and type 1 and type 2 error all related?

A: Type 1 error is the error of rejecting a true null hypothesis. This happens when the value of the…

Q: a. If a constant c is added to each xi in a sample, yielding yi = xi + c, how do the sample mean and…

A: Mean: For a set of n observations, x1, x2, ... , xn mean is defined as, Median: For a frequency…

Q: What does a z score of -4 mean?

A: z-score: The z-score is a standardized score which represents the number of standard deviation that…

Q: Using this information, what is the coefficient of the predictor variable "Number of Brands"?

A: From the given information, the standard error for number of brands is 21.

Q: What is the name of the test used?

A: H0 : Die is fair H1 : Die is not fair

Q: What is the weakness of p value approach?

A: p-value is basically the probability that the null hypothesis is false. Interpretation: If p-value…

Q: What is the discrimination coefficient?

A: Discrimination coefficient

Q: A historian examining British colonial records for the Gold Coast in Africa suspects that the death…

A: The proportion of African that died is p1=x1n1=24534002=0.007205459 The proportion of Europeans that…

Q: What is a leading coefficient?

A: Leading coefficient in a given  polynomial is  the coefficient of the term of highest digree in a…

Q: Explain ONE-TAILED AND TWO-TAILED TESTS.

A:

Q: A software company is interested in improving customer satisfaction rate from the 77% currently…

A: Solution: Given data p = 0.77 sample size (n) = 248 x = 202 Sample Proportion is given  by; (p̂) =…

Q: A software company is interested in improving customer satisfaction rate from the 66% currently…

A: From the provided information, A software company is interested in improving customer satisfaction…

Q: What are the assumptions when you use a Z score?

A:

Q: What is defination for p -value

A: P-value :  It is mostly used for take decision while testing a hypothesis.

Q: What is the outcome and the conclusion of this test?

A: a) Option F t sampling distribution because the population is normal, and standard deviation is…

Q: A machine that fills beverage cans is supposed to put 12 ounces of beverage in each can. The…

A: Given that the claim is " The variance is differs from 0.02". Null Hypothesis: H0:σ2=0.02…

Q: How to count z-score?

A: Let X follows the normal distribution with mean µ and standard deviation σ.

Q: What is the value of D4 in the scores of the random 10 students from Science: 22, 21, 26, 28, 24,…

A: Solution-: Given data: 22, 21, 26, 28, 24, 20, 27, 26, 26, 29 We want to find D4=?

Q: Explain how the formula of finding the x-value of the corresponding z-score was formed.

A: The outcome of a random experiment is called random variable. And z-score is the standardized value…

Q: In a small grocery, 23% of the bottled products were sold while 63% of the canned goods were not. If…

A: Solution To find the confidence interval we will use z distribution.

Q: Why is there more variation in the possible values of the studentized version of x¯than in the…

A: Because we are using s as an estimate of σ

Q: Ten students took their practical exam in Science. Out of 50 items ,they obtained the following…

A: Given : scores(x):  44, 49, 42 , 25 , 29 , 21 , 39 , 40, 47 , 45

Q: How do you you decide whether your a test is one, two, left or right tailed?

A: Any assumption about the parameter or probability function is known as Hypothesis testing (HT).

Q: Based on the photo given, what are the interpretation of the coef

A: From the given output,  The coefficient of 'ln PDEBT' is -0.2267 The coefficient of 'ln HC' is…

Q: what is the difference between z* and z-score?

A: z* is called the z-critical value. We calculate the z-critical value or z* from the standard normal…

Q: A historian examining British colonial records for the Gold Coast in Africa suspects that the death…

A: The number of samples extracted from the population is the sample size. When the sample size 30 or…

Q: Which is the correct output (B or C) for the appropriate test? Explain.

A: A student compared organic food price at Grocery1 and Grocery2 here we use Paired t-test for…

Q: The sports coaches at West High School believe that 12% of their students play soccer. In a sample…

A: Given,population proportion(P)=0.12sample size(n)=155and X=21sample proportion (p^)=xnp^=21155=0.135

Q: The symbol ¯xx¯ represents the mean of the sample. True False

A: The given statement is TRUE. Because, the symbol x-bar represents the mean of a sample.