13. An independent-measures research study uses two samples; each group has n = 12 participants. If the data produce a t-statistic of t = 2.095, which of the following is the correct decision for a two-tailed hypothesis test? a. Reject the null hypothesis with a = .05 but fail to reject with a = .01 b. Reject the null hypothesis with either a = .05 or a = .01 c. Fail to reject the null hypothesis with both a = .05 or a = .01 d. Cannot answer without additional information

Q: A normal distribution has a population mean of p=75 and a standard deviation of o=9. What is the P(X...

A:

Q: For #6 - #10: The results of a hypothesis test are reported as follows: t(15) = 2.70, p < .05. Based...

A: Given the results of a hypothesis test are given.  We have to find the sample size. 

Q: Once we have a x value we need to determine if it is statistically significant. This is accomplished...

A: Let 'A' represents the variable from group 1 Let 'B' represents the variable from group 2 The follow...

Q: A 95% confidence interval for p is computed to be (1.65, 3.35). For each of the following hypotheses...

A: Given that  95% confidence interval for μ is computed to be (1.65, 3.35) H0:μ=2   Vs    H1:μ≠2

Q: 2. A Type Il error is committed when A. we reject a null hypothesis that is true. B. we retain a nul...

A: The decision in statistical test is based on random samples taken from the population so actual resu...

Q: A published report claims that 35% of college students have used an online dating site or app.  Beli...

A:

Q: A student types “n" letters to "n" persons and types the recipients' names and addresses in "n" enve...

A:

Q: 12% of all Americans suffer from sleep apnea. A researcher suspects that a higher percentage of thos...

A:

Q: For a large, top-rated corporation, 99% of employees said the corporation is a great place to work. ...

A: If the random samples are drawn from the population and sample proportion of each sample is computed...

Q: 7. The following are null hypotheses except A. The average annual income of all the families of Bara...

A: 7. Hypothesis testing uses data from sample to draw conclusions on population parameter.

Q: Mr. Zuro finds the mean height of all 16 students in his statistics class to be 66.0 inches. Just as...

A:

Q: In a one-tailed test, in which critical values below will the computed z of 2.312 falls in the non-r...

A: Solution-: Given: zstat=z=2.312 We find which critical values below will the computed z of 2.312 fal...

Q: Measuring lung function: One of the measurements used to determine the health of a person's lungs is...

A:

Q: that the distribution is normal. What is the chance that three indoor cats die between 15 and 18 yea...

A: here mean= 14 year standard deviation  = 2.5 year  

Q: It was reported in a daily newspaper that the Filipino men in Metro manila aged 50 to 60 years, exer...

A: The hypothesis test is an inference process which is used to test the claims of population parameter...

Q: A sample of n=25 individuals is randomly selected from a population with a mean of p=65, and a treat...

A: Given data  n = 25 mu  = 65 S = 20 Sample mean  = 70 Two tailed test alpha = 0.05

Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval...

A: Given that  n=350 , X=161 Formula for confidence interval   C.I = (p  ±  √(p(1 - p)/n))

Q: Based on a poll , among adults who regret getting tattoos, 28% say that they were too young when the...

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...

Q: It known that the average number of drop out per month 2.3. If you would like to predict the number ...

A:

Q: The Peabody Picture Vocabulary Test has a standard score mean of 100 and a standard deviation of 15...

A: There are 3 independent samples which are 3 methods. We have to test whether there are any group dif...

Q: You work as a manager in the admission department of company. You were asked by your department head...

A: Frequency is the count of the individual observation. It can be tabulated as discrete frequency dist...

Q: ory test, the test subjects are shown 625 objects and are asked after two hours to name - 80% of the...

A: The test Subjects are shown 625 objects, N=625 the test subject remembers 80% of the objects after t...

Q: A sample of size 115 will be drawn from a population with mean 48 and standard deviation 12. Use the...

A:

Q: The following sample data represent the number of late and on time flights for the Delta, United and...

A:

Q: Consider the following results for independent samples taken from two populations. Sample 1 Sample 2...

A: Given: n1=400n2=300 p1¯= 0.48p2¯= 0.32    

Q: 1st, compute the production indexes for aluminum, fertilizer, and lumber with time period 1 as the b...

A: Index numbers are use to compare the value, price or quantity of a certain commodity in the current ...

Q: I want to estimate the proportion of college professors who believe in aliens. How many college prof...

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

Q: The required sample size is (Round up to the nearest whole number as needed.) Does the sample size s...

A: Sample mean is within 0.014 of the population mean, Margin of error=0.014 At 98% confidence interval...

Q: Select the item that would be considered a placebo.

A: # What is a placebo and why is it used  Placebo is used in clinical trials to test the effectiveness...

Q: Question 3    A study was conducted to determine the differences in the average weight loss of four...

A: INTRODUCTION:  ANOVA:  As the word ANOVA may be suggest that, it is the analysis of variance, i.e. c...

Q: Weight loss: In a study to determine whether counseling could help people lose weight, a sample of p...

A:

Q: A large airline company called Fusion Fly monitors customer satisfaction by asking customers to rate...

A: The mean is 3.38 and the standard deviation is 1.76.

Q: Below are the jersey numbers of 11 players randomly selected from a football tearn. Find the range, ...

A:

Q: The average number of phone inquiries each day at the customer service is 40. Find the probability t...

A:

Q: A sample of n=25 individuals is randomly selected from a population with a mean of p=65, and a treat...

A:

Q: Sarah decides to create a boxplot for each set of golf balls, as displayed in Figure 2. 270 275 280 ...

A: Boxplot : A box and whisker plot, often known as a box plot, shows a five-number summary of a collec...

Q: How much is in that can? A machine that fills beverage cans is supposed to put 12 ounces of beverage...

A: Given: Volume of can, X 11.98 12.08 11.87 11.95 11.89 12.01 11.97 12.1

Q: Test the claim about the difference between two population means u, and 2 at the level of significan...

A:

Q: You measure 26 randomly selected textbooks' weights, and find they have a mean weight of 69 ounces. ...

A: Given that  x̄ = 69 , ? = 13.4 , n =26

Q: Туpes: i) Equal Allocation - this is used when you want to obtain an equal number of samples from ea...

A: Here in the stratified random sampling, the total sample size n is divided equally among all the str...

Q: The following equation describes the median housing price in a community in terms of amount of pollu...

A: Disclaimer : “Since you have posted a question with multiple sub-parts, we will solve first three su...

Q: The nurses of a local hospital pledged the following donations, in pesos, to the PRC: 20, 25, 30, 3...

A: Solution

Q: How many computers? In a simple random sample of 140 households, the sample mean number of personal ...

A:

Q: 1. Pedro is studying the effect of sleep on social media use. He instructed his participants to slee...

A: Note: As per the request of the student, the answer is provided for question 1.

Q: A professional skier was trying to decide whether to use a new racing wax for cross-country skis. He...

A: Given:  the wax by racing on the course 8 times, n=8 Sample of race times found a mean of 53.1 secon...

Q: Part 2 of 3 (b) Should this confidence interval be used to estimate the mean weight of all one-year-...

A:

Q: 9. A student researcher is assigned the task of finding out if the level of education attained by a ...

A: We use chi-square test to test the independency.  Chi-square= Σ(Oi-ei)2/ei  Where Oi's are observed ...

Q: Let X, Y be independent random variables with exponential distribution of parameter θ > 0. Are the r...

A: Solution

Q: A sample of n=25 individuals is randomly selected from a population with a mean of u=65, and a treat...

A:

Q: The Lawnpoke Golf Association has established rules that manufacturers of golf equipment must meet f...

A: