Question

In: Math

1. Indicate which type of t-test would be appropriate. You can choose between the one sample...

1. Indicate which type of t-test would be appropriate. You can choose between the one sample t-test, dependent samples t-test and independent samples t-test. Write down the null and alternative hypotheses.

(a) In a sample of 20 newborn Russian Blue kittens, the mean weight was 3 ounces with a standard deviation of 0.5 ounces. In a sample of 20 newborn Turkish Van kittens, the mean weight was 5 ounces with a standard deviation of 0.6 ounces. On average, are the birth weights of Russian Blue kittens different from those into Turkish Van kittens?

(b) 12 normal (“wild type”) and 13 cyclin d2 knockout mice (mutants) were placed in devices which recorded their locomotor activity. The mean and standard deviation of activity for the former group were 112 and 36, while those for the latter were 200 and 25. Do the two mouse genotypes differ in average amount of locomotor activity?

(c) A sample of 25 students from a certain school have a mean SAT score of 1200 points. Suppose the general population of test-takers has a mean of 1060 points and a standard deviation of 110 points. On average, do students from the school in question score higher than the general population?

(d) Mice used in research come in different strains (a bit like breeds of dog or cat). These can differ in characteristics such as the startle response, i.e. how forcefully the animal flinches when it hears a loud sudden noise. Some researchers wanted to find a mouse strain with a strong startle response as a basis for a line of mutants. They therefore compared the startle response in 10 mice of the C57BL/6J strain and 10 mice of the 129X1/SvJ strain.

(e) Amphetamine has been found in some cases to reduce the startle response of mice. Quinpirole is drug that acts on some of the same neurotransmitters as amphetamine but is more selective and has a different mechanism. Researchers wondered therefore whether quinpirole would reduce the startle response in mice. They therefore injected 10 mice with quinpirole and 10 mice with saline (as a control) and measured their startle response to loud noises.

(f) Imagine the same situation as (e) above, except that instead of injecting each mouse only once with either quinpirole or saline, all 20 mice are given both injections on separate days. For example, mouse #1 gets saline and has his startle response tested, then several days later receives quinpirole and his startle response is tested again.

(g) Now imagine the same situation as (e) above except that all 20 mice are tested once, with quinpirole, and their startle response is com- pared to the previously published population mean and standard deviation of startle responses for mice without quinpirole (this is not how you would do the experiment in real life).

Expert Solution

a) independent sample t-test

b) independent sample t-test

c)one-sample t-test

d) independent sample t-test

e) independent sample t-test

f) dependent sample t-test

g) one-sample t-test

milcah answered 2 hours ago

Part III. Below indicate whether the appropriate test would be an independent t-test, dependent t-test, One-way...

Part III. Below indicate whether the appropriate test would be an independent t-test, dependent t-test, One-way ANOVA, or z-test. 4. A researcher wants to know if people find baby animals cuter than adult animals. All of the participants in a study are shown 10 pictures of baby animals and 10 pictures of adult animals. They are asked to rate (on a 1 to 10 scale) how cute they think each animal is. 5. A statistics professor wants to know if...

Choose the t test (which mean pick ONE) you think is appropriate out of the three...

Choose the t test (which mean pick ONE) you think is appropriate out of the three t tests listed below to determine the t-value for the data (you can copy the results from your SPSS output and past them here: One sample (Mean) test Two samples (independent t-test) test Paired/related sample t tests From the t test you ran above, tell me the confidence intervals (look under 95% CI, lower and upper) for the data and interpret what they mean....

For the following, indicate whether you should use a one sample t-test, paired t-test, or two...

For the following, indicate whether you should use a one sample t-test, paired t-test, or two sample t-test and whether you have chosen a one-sided or two-sided alternate hypothesis: A) Do macroeconomics students at Vanderbilt score significantly higher on the Math SAT than the national average? My Answer: One sample t-test, one tailed B) Do macroeconomics students at Vanderbilt score significantly higher on the Verbal SAT than the national average? My answer: One sample t-test, one tailed C) Report a...

Part II. Indicate whether you would perform a z test, two-sample t test, paired t test,...

Part II. Indicate whether you would perform a z test, two-sample t test, paired t test, or ANOVA for the following research question? All the outcomes are continuous variables. A group of adolescent boys was offered interpersonal skills counseling and then tested in September and May to see if there was any impact on family harmony. 3 groups of participants were exposed to different levels of treatment for ankle sprain. Which treatment was more effective? 1 group of men was...

Indicate the test you would use and the reason (e.g. One sample test for the variance...

Indicate the test you would use and the reason (e.g. One sample test for the variance of a normal distribution) One sample z test for the mean of a normal distribution with known variance (Test 1*) One Sample T Test for the Mean of a Normal Distribution with unknown Variance (Test 2) The paired t-test (Test 3) A researcher wants to test the effect of using a lumbar support pillow on angular position of the pelvis in relaxed sitting. The...

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent...

2.2. Indicate which test (paired samples (ie dependent) t-test, independent two samples t-test, one-sample t-test, independent samples z-test) is most appropriate for the following situations : A. Comparison of weight gain of two groups of 18 cows where one group was raised following standard practices and the other group was raised following “organic” standards. B. Comparison of scores on a fitness test of Olympic-class distance runners (n=20) with the national average score of people of a similar age range (22-31...

Which design is NOT appropriate for the one-sample t test? a. Matched pairs b. A design...

Which design is NOT appropriate for the one-sample t test? a. Matched pairs b. A design with one group c. A design with two groups, each with different subjects d. A design with two groups, each with the same subjects What does a p-value tell you, in a test with Ha : μ > 0? a. The probability of observing a score less than the observed score b. The probability of observing a score equal to the observed score c....

For which of the following scenarios would it be appropriate to use a one-sample z-test? A....

For which of the following scenarios would it be appropriate to use a one-sample z-test? A. Comparing the average weight of newborns in Hospital A to the average weight of newborns in Hospital B B. Comparing the political affiliation of ASU students against the political affiliation of all college students C. Comparing the number of packs of cigarettes smoked per day by residents of urban areas with the number of cigarettes smoked per day by all persons in the USA...

For the following scenarios, indicate which type of t-test (either paired samples or independent samples) would...

For the following scenarios, indicate which type of t-test (either paired samples or independent samples) would be most appropriate. (8 points; 2 points each) Determining whether children remember more details from a surprising event than college students. Determining whether left-handed people show higher vocabulary scores than right-handed people. Determining whether rats show differences in their spatial navigation abilities before and after consuming a high fat meal. Determining whether a group of people has faster running speeds after drinking 1 cup...

Indicate which test (dependent samples t-test, independent samples t-test, independent samples z-test) is most appropriate for...

Indicate which test (dependent samples t-test, independent samples t-test, independent samples z-test) is most appropriate for the following situation: i. Comparison of mean recycling participation between 9 large cities and 11 small cities ii. Comparison of the weights of 16 Toronto Maple Leaf rookies at the beginning versus the end of the regular NHL season. iii. Comparison of fin length of 35 male and 37 female brook trout sampled in Spruce Lake, Nottingham Forest. iv. Comparison of the mass of...