Question

A researcher wishes to see if there is a difference in the cholesterol levels of two...

A researcher wishes to see if there is a difference in the cholesterol levels of two groups of men. A random sample of 30 men between the ages of 25 and 40 is selected and tested. The average level is 223. A second sample of 25 men between the ages of 41 and 56 is selected and tested. The average of this group is 229. The population standard deviation for both groups is 6. At a 0.0l significance level, is there a difference in the cholesterol levels between the two groups? Perform a hypothesis test.                  

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A researcher wishes to test a hypothesis, using a 5% level of significance, to see if...
A researcher wishes to test a hypothesis, using a 5% level of significance, to see if the average level of cholesterol can be reduced from using a medical treatment for a particular population. If one wishes to perform a one-side one-sample t test, and wishes that the t test to have a power of 0.80 to detect a reduction of 10mg/100ml in cholesterol (LDL), how large a sample would be needed? (From a pilot study, the estimated standard deviation of...
A medical researcher wishes to try three different techniques to lower cholesterol levels of patients with...
A medical researcher wishes to try three different techniques to lower cholesterol levels of patients with high cholesterol levels. The subjects are randomly selected and assigned to one of three groups. Group 1 is given medication, Group 2 is given an exercise program, and Group 3 is assigned a diet program. At the end of six weeks, each subject's cholesterol level is recorded. Determine the test statistic F-value to test the hypothesis that there is no difference among the means....
As part of a research program for a new cholesterol​ drug, a pharmaceutical company would like...
As part of a research program for a new cholesterol​ drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL​ (low-density lipoprotein) cholesterol of men. The accompanying data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a​ 95% prediction interval to estimate the LDL cholesterol level of a 35​-year-old man. Age 24 37 25 33 41 32 41 Cholesterol 145 175 156 200 157 145 206 UPL= LPL=
A researcher wishes to see whether there is any difference in the weight gains of athletes...
A researcher wishes to see whether there is any difference in the weight gains of athletes following one of three special diets. Athletes are randomly assigned to three groups and placed on the diet for six weeks. The weight gains (in pounds) are shown below. At α = 0.10, can the researcher conclude that there is a difference in the diets? Diet A Diet B Diet C 3 10 8 7 12 3 6 11 2 4 14 5 a)...
A researcher wishes to determine whether there is a difference in the mean age of middle...
A researcher wishes to determine whether there is a difference in the mean age of middle school, high school, and college teachers. Teachers are randomly selected. Their ages are recorded below. Find the P-Value. Middle School Teachers High School Teachers College Teachers 23 38 45 28 36 45 27 41 39 37 47 61 52 42 36 25 31 35 Group of answer choices 0.3571 0.2357 0.1142 0.2289
As part of a research program for a new cholesterol​ drug, a pharmaceutical company would like...
As part of a research program for a new cholesterol​ drug, a pharmaceutical company would like to investigate the relationship between the ages and LDL​ (low-density lipoprotein) cholesterol of men. The accompanying data set shows the ages and LDL cholesterol levels of seven randomly selected men. Construct a​ 95% prediction interval to estimate the LDL cholesterol level of a 24​-year-old man. Age: 24, 37, 26, 31, 41, 32, 41 Cholesterol: 145, 180, 160, 199, 155, 144, 210
A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10...
A pharmaceutical company introduced a new drug that would reduce cholesterol levels. A researcher selected 10 cholesterol patients and tested them for their cholesterol level. The subjects were then placed on the new drug for a period of 6 months, and the cholesterol level reading was taken again. Both the results are given below. Assume the samples are random and dependent, and the populations are normally distributed. Use 0.01 level of significance and test whether there is evidence of reduced...
1. Several baseline studies are conducted on X = “cholesterol level (mg/dL)” in a certain population...
1. Several baseline studies are conducted on X = “cholesterol level (mg/dL)” in a certain population of individuals. From the given information described below for each of these studies, choose the LETTER of the most appropriate statistical test to be implemented, from the following list. Note: For each study, there is only one correct choice of test. However, a given statistical test can be the correct choice for more than one study. For example, choice A could be the correct...
A researcher in obstetrics believes that pregnancy causes cholesterol levels to rise in women. Suppose the...
A researcher in obstetrics believes that pregnancy causes cholesterol levels to rise in women. Suppose the mean cholesterol level for all American women is 200 with a standard deviation of 42. The researcher samples 36 pregnant women and finds their average cholesterol level is 215.4. Is there enough evidence to support the researchers beliefs using a .01 significance level? (Use the Critical Value Approach!)
A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels...
A new drug to treat high cholesterol is being tested by pharmaceutical company. The cholesterol levels for 18 patients were recorded before administering the drug and after. The average difference in cholesterol levels (after - before) was 4.19 mg/dL with a standard deviation of 8.055 mg/dL. Using this information, the calculated 90% confidence paired-t interval is (0.887, 7.493). Which of the following is the best interpretation of this interval? Question 8 options: 1) The proportion of all patients that had...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT