(Answered) Learning biology with computers an educator wants to

Statistics

Learning biology with computers An educator wants to compare the effectiveness of computer software for teaching biology with that of a textbook presentation. She gives a biology pretest to each of a group of high school juniors, then randomly divides them into two groups. One group uses the computer, and the other studies the text. At the end of the year, she tests all the students again and compares the increase in biology test scores in the two groups. Is this an observational study or an experiment? Justify your answer.

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92859536
Price:- $10

Verified Expert

Priced at $20 Now at $10, Verified Solution

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Te height of woman ages 20-29 is normally distributed

The height of woman ages 20-29 is normally distributed , with a mean of 64.3 inches. assuming the standard diviation = 2.4 inches. are you more likely to randomly select 1 woman with a height less than 66.2 inches or are ...

1 consider the following data on distances traveled by 60

1 . Consider the following data on distances traveled by 60 people to visit the local amusement park. distance freq 1-8 20 9-16 18 17-24 10 25-32 6 33-40 6 Expand and construct the table adding columns for relative frequ ...

Assume that from a random sample of 18 trees a researcher

Assume that from a random sample of 18 trees a researcher found that the average height of the trees was 4.3 meters with a standard deviation of 0.25 meters. Assume that the distribution of the heights of these trees is ...

A puck company wants to sponsor the players with the 20

A puck company wants to sponsor the players with the 20% quickest goals in hockey games. The times of first goals are normally distributed with a mean of 8.54 minutes and a standard deviation of 4.91 minutes. How fast wo ...

Fifth fourth national bank has a savings program which will

Fifth Fourth National Bank has a savings program which will guarantee you $11,000 in 12 years if you deposit $60 per month. What APR is the bank offering you on this savings plan?

A company that manufactures gasoline station pumps must

A company that manufactures gasoline station pumps must ensure that it pumps at least 1 gallon of gasoline 84% of the time. If the population of pump amounts for a particular pump is normally distributed with mean μ and ...

According to bottledwaterorg per capita consumption of

According to bottledwater.org, per capita consumption of bottled water in the U.S. in 2012 was reported to be 30.8 gallons. Assume that the amount of bottled water consumed per person is Normally distributed with mean 30 ...

The number of facets in the eye of the fruit fly drosophila

The number of facets in the eye of the fruit fly Drosophila melanogaster is of interest in genetics to model changes across many generations (ie genetic selection). The distribution of the number of facets in the eye in ...

There are 3 orange balls and 17 blue balls that are in a

There are 3 orange balls and 17 blue balls that are in a bag. A person reaches into the bag, without looking, and pulls one of the balls out of the bag. What is the probability that the ball is orange?

Express courier service has found that the delivery time

Express Courier Service has found that the delivery time for packages is normally distributed with mean 14 hours and standard deviation 2 hours. a. What percent of the packages will be delivered in less than 18 hours? b. ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert