The men took an average of 20.5 hours per year of personal, Ask an Expert

Statistics

Data were collected on annual personal time (in hours) taken by a random sample of 16 women and 20 men employed by a medium-sized company. The women took an average of 24.75 hours of personal time per year with a standard deviation of 2.84 hours. The men took an average of 20.5 hours per year of personal time with a standard deviation of 2.75 hours. What is the pooled estimate of the variance? Round to three decimal places.

a. 7.785

b. 12.998

c. 2790

d. 264.672

e. None of the above

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9355435

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A forest type consists of three species of trees25 are

A forest type consists of three species of trees: 25% are Douglas-fir 40% are Hemlock 35% are Western Red Cedar a) What is the probability that a tree selected at random will be a Douglas-fir? b) What is the probability ...

A manufacture claims that the life span of its tires is

A manufacture claims that the life span of its tires is 52,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of these tires are normally distributed. You select 1 ...

Te proportion of people who love dogs is known to be 75

The proportion of people who love dogs is known to be 75 % Australia wide. A town in far north Queensland is often different in many aspects to the rest of Australia. When 88 families were sampled the proportion who love ...

Use the standard normal distribution or Use the standard normal distribution or

Use the standard normal distribution or the? t-distribution to construct a 90?% confidence interval for the population mean. Justify your decision. If neither distribution can be? used. In a recent? season, the populatio ...

The mean throwing distance of a football for a luis a high

The mean throwing distance of a football for a Luis, a high school freshman quarterback, is 50 yards, with a standard deviation of three yards. The team coach tells Luis to adjust his grip to get more distance. The coach ...

Many manufacturing problems involve the accurate matching

Many manufacturing problems involve the accurate matching of machine parts, such as shafts, that fit into a valve hole. A particular design requires a shaft with a diameter of 22.000 mm, but shafts with diameters betwe ...

The diameter of ping pong balls manufactured at a large

The diameter of Ping Pong balls manufactured at a large factory are approximately normally distributed with a mean diameter of 1.30 inches and a standard deviation of .04 inches. Use Excel to calculate the probability of ...

How does sampling distribution from an area such as

How does sampling distribution from an area such as business, and sports, used in marketing

We polled a sample of 900 random people on whether they

We polled a sample of 900 random people on whether they thought a candidate for a high government position deserves to be nominated. We found that 405 of the 900 people (or 45%) believe the candidate should not be nomina ...

The average price of a television on a certain web site is

The average price of a television on a certain Web site is ?$760. Assume the price of these televisions follows the normal distribution with a standard deviation of ?$190. Complete parts a through d below. What is the pr ...

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