Question
In: Statistics and Probability
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of 61 students using Method 1 produces a testing average of 88.6A sample of 111111 students using Method 2 produces a testing average of 64.9 Assume that the population standard deviation for Method 1 is 14.68, while the population standard deviation for Method 2 is 5.52. Determine the 90%90%confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2.
Step 1 of 3:
Find the point estimate for the true difference between the population means.
Step 2 of 3:
Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.
Step 3 of 3:
Construct the 90% confidence interval. Round your answers to one decimal place.
Solutions
orchestra answered 2 years agoRelated Solutions
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching anatomy. A sample of 215215
students using Method 1 produces a testing average of 55.555.5. A
sample of 242242 students using Method 2 produces a testing average
of 64.264.2. Assume that the population standard deviation for
Method 1 is 7.957.95, while the population standard deviation for
Method 2 is 18.2118.21. Determine the 90%90% confidence interval
for the true difference between testing averages for students using
Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching anatomy. A sample of 225
students using Method 1 produces a testing average of 68.2 A sample
of 242 students using Method 2 produces a testing average of 66.2.
Assume that the population standard deviation for Method 1 is 5.66
while the population standard deviation for Method 2 is 10.06.
Determine the 98% confidence interval for the true difference
between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 214
students using Method 1 produces a testing average of 53.9. A
sample of 193 students using Method 2 produces a testing average of
88.9. Assume that the population standard deviation for Method 1 is
17.61, while the population standard deviation for Method 2 is
11.73. Determine the 99% confidence interval for the true
difference between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 54
students using Method 1 produces a testing average of 51.7. A
sample of 90 students using Method 2 produces a testing average of
56.8. Assume that the population standard deviation for Method 1 is
7.35, while the population standard deviation for Method 2 is
16.72. Determine the 80% confidence interval for the true
difference between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 226
students using Method 1 produces a testing average of 69.8. A
sample of 191 students using Method 2 produces a testing average of
81.5. Assume that the population standard deviation for Method 1 is
11, while the population standard deviation for Method 2 is 16.55.
Determine the 99% confidence interval for the true difference
between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 157
students using Method 1 produces a testing average of 65.9. A
sample of 129 students using Method 2 produces a testing average of
80. Assume the standard deviation is known to be 12.47 for Method 1
and 12.84 for Method 2. Determine the 95% confidence interval for
the true difference between testing averages for students using
Method 1 and students using Method 2....
A researcher compares the effectiveness of two different instructional methods for teaching electronics. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching electronics. A sample of 138
students using Method 1 produces a testing average of 61 . A sample
of 156 students using Method 2 produces a testing average of 64.6 .
Assume that the population standard deviation for Method 1 is 18.53
, while the population standard deviation for Method 2 is 13.43 .
Determine the 98% confidence interval for the true difference
between testing averages for students...
A researcher compares the effectiveness of two different instructional methods. A random sample of 78 students...
A researcher compares the effectiveness of two different
instructional methods. A random sample of 78 students using Method
1 produces a testing average of 89.5 with a standard deviation of
16.8. A sample of 117 students using Method 2 produces a testing
average of 55.9 with a standard deviation of 8.2. Construct a 99%
confidence interval for the true difference in testing averages
between the two methods. Round the endpoints of your interval to
the nearest tenth if necessary. Show...
A researcher designed a study to find out the effectiveness of two teaching methods: lecture-style vs....
A researcher designed a study to find out the effectiveness of
two teaching methods: lecture-style vs. discussion-style. He
compares the test scores of the students taught with these two
different methods. The scores on the test range from 0 to 41 with
higher scores indicating better performance. The test results are
provided in the table below:
Group Methods
n
M
SS
1
lecture-style
15
24
336
...
In an effort to evaluate different methods of teaching a foreign language, a researcher examined the...
In an effort to evaluate different methods of teaching a foreign
language, a researcher examined
the performance of students learning Spanish under four different
teaching methods. Group 1 learns in a
traditional lecture/lab format; group 2 is taught from a programmed
text; group 3 is taught from podcasts; and
group 4 is taught from videos of people and life in Spain. After
several weeks of instruction, all students were
given a Spanish quiz; these scores were recorded:
Group 1 Group...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- A pension fund manager is considering three mutual funds. The first is a stock fund, the...
- Compute the cost of not taking the following cash discounts. (Use a 360-day year. Do not...
- During his project presentation, Bob falls sick and performs poorly. However, his colleague, Dan, concludes that...
- A sample human input file that contains test values that a human would enter on the...
- A solution is prepared by dissolving 15 ml of methanol in 150.0 ml water at 25...
- Consider a newlywed who is planning a wedding anniversary gift of a trip to Canada for...
- We are evaluating a project that costs $868,000, has a life of eight years, and has...
ADVERTISEMENT