Question: To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean of = 40,

To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean of µ = 40, and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be µ = 35.
a. If the sample variance is s2 = 32, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with a = .05?
b. If the sample variance is s2 = 72, are the data sufficient to conclude that the treatment has a significant effect using a two-tailed test with a = .05?
c. Comparing your answer for parts a and b, how does the variability of the scores in the sample influence the outcome of a hypothesis test?

Step by Step Solution

★★★★★

3.44 Rating (151 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a With s 32 s M 2 and t 52 250 This is beyond the critical boundaries of 2365 s... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

568-M-S-V-A (1425).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

Consider the function f : N Z defined as f ( x ) = x 4 + x 2 Use this information to answer the questions below. All answers should be yes or no . Is the function injective? ( yes / no ) Blank 1 Is...

A major airline is attempting to evaluate the effect of recent changes it has made in scheduling flights between New York City and Los Angeles. Data available are shown below. Number of Number of...

The researchers design an experiment to evaluate the effect of applying fertilizer having varying levels of nitrogen, potassium, and phosphorus on the yields of orange trees. There were three, four,...

A sample is selected from a population with a mean of = 40 and a standard deviation of = 8. a. If the sample has n = 4 scores, what is the expected value of and the standard error of M? b. If the...

To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean of = 40, and the treatment is administered to the individuals in the sample. After treatment, the...

12. To evaluate the effect of a treatment, a sample of n = 8 is obtained from a population with a mean of u = 40, and the treatment is administered to the individuals in the sample. After treatment,...

9. To evaluate the effect of a treatment, a sample of n = 9 is obtained from a population with a mean of M = 40, and the treatment is administered to the individuals in the sample. After treatment,...

To evaluate the effect of a treatment, a sample of n = 9 is obtained from a population with a mean of = 40, and the treatment is administered to the individuals in the sample. After treatment, the...

Forecasting balance sheet

14. To evaluate the effect of a treatment, a sample of n = 6 is obtained from a population with a mean of M = 80, and the treatment is administered to the in- dividuals in the sample. After...

To evaluate the effect of a treatment, a sample of n 5 8 is obtained from a population with a mean of m 5 50, and the treatment is administered to the individuals in the sample. After treatment, the...

Demonstrate that when two harmonic oscillations are added, the time-averaged energy of the resultant oscillation is equal to the sum of the energies of the constituent oscillations, if both of them...

For the following data: a. Make a scatter plot of y versus x. Is the relationship between x and y approximately linear, or is it nonlinear? b. Compute the natural logarithm of each y value. This is...

The systemwide component of organizational development ( OD ) refers to

A stock selling for $25 today will, in 1 year, be worth either $35 or $20. If the interest rate is 8%, what is the value today of a one-year call option on the stock with exercise price $30? Use the...

The progress of a type of cancer differs in women and men. Researchers want to design an experiment to compare three therapies for this cancer. They recruit 500 male and 300 female patients who are...

Which of two brands (X or Y) of electric razor shaves closer? Researchers want to design and carry out an experiment to answer this question using 50 adult male volunteers. Heres one idea: Have all...

Number of variables used in the predicate O(b), where O(b) denotes overdue book in a library?

Carl and Jenny adopt a Korean orphan. The adoption takes 2 years and two trips to Korea and is finalized in 2019. They pay $7,000 in 2018 and $7,500 in 2019 for qualified adoption expenses. In 2019,...

You are working with Sarah on developing a project charter for a new project. All of the following elements should be included in the project charter except for which one? A. Key project deliverables...

To examine the relationship between alcohol consumption and birth weight, a researcher selects a sample of n = 20 pregnant rats and mixes alcohol with their food for 2 weeks before the pups are born....

To examine the relationship between texting and driving skill, a researcher uses orange cones to set up a driving circuit in the high school parking lot. A group of students is then tested on the...

Childhood participation in sports, cultural groups, and youth groups appears to be related to improved self-esteem for adolescents (McGee, Williams, Howden-Chapman, Martin, & Kawachi, 2006). In a...

Suppose the spot and three-month forward rates for the yen are 79.05 and 78.52, respectively. b. What would you estimate is the difference between the annual inflation rates of the United States and...

6) Suppose you invest 35% of your portfolio in 3M and 65% in Comcast. The expected $ return on these stocks is 13% and 19% respectively. The Standard deviations of their returns are 17% & 23%,...

1. What was the hospital's original profit forecast (assume away any issues with depreciation, taxes, etc.)? Halfway through the fiscal year, what is the hospital's revised projection for FY11...