Search 75,776 tutors

# Many consumer groups feel that the U.S. Food and Drug Administration (FDA) drug approval process is too easy,

and as a result, too many drugs are approved that are later found to be unsafe.  On the other hand, a number of industry lobbyists have pushed for a more lenient approval process so that pharmaceutical...

# word problem figuring out percentage of teams total points

olga currently leads the 8th grade girls team in scoring with a total of 50  points.  Thomas leads the 8th grade boys team with a total of 52 points.  which player should get the midseason...

# Percentage question

Assume that red blood cell counts of women are normally distributed with a mean of 4.577 and a standard deviation of 0.382. What percentage of women have red blood cell counts in the normal range...

# statistics

Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text messages you received yesterday...

# Comparing multiple means from a single sample post hoc in SPSS

For my research project I measured customer satisfaction on a 7 point Likert scale. For each business unit we measured satisfaction on 10 different items. On the first sight, the means seem to be...

# What is the null and alternative hypotheses?

An SRS of 16 student subjects took a sensitivity to contrast after 3 hours facing into bright sun, both with and without eye grease. This is a matched pairs design. Here are the differences in sensitivity,...

# Confidence Interval

In a survey of 1003 people, 59% said that they have never hesitated to give a handshake because they had a fear of germs. The survey results were reported in USA Today, and the survey was conducted...

# Mathematic Statistics

Students in an online Statistics course reported the following hours spent weekly on the course.8.5 4.5 12.5 13 14 3.5 6.5 18 21.5 23.5Assume the number of hours spent by all students follows a normal...

# Mathematics Statistics

In a survey of students at a university, 34 out of 90 females think the campus food is adequate while 56 out of 120 males surveyed approve. Test the claim that there is a difference in the females'...

# can we reject the null hypothesis?

You would like to know if people give different responses to white interviewers than to nonwhite interviewers. To explore this, you use the American National Election Studies 2008 data in order to...

# is there any free statistics programs that complete the calculations for you?

I can identify the the correct values for the formulas but sometimes miscalculate the answers.  Is there any online websites that you can click on the corresponding formula and fill in the values...

# Statistics Question I can't get the correct answer

The time until maturity of a certain variety of tomato plant normally distributed with mean µ and standard deviation σ = 2.4 days.  I select a simple random sample of four plants of this variety...

# Statistics Question

If a specimen is weighed 8 times on a scale.  σ = 0.001.  The average weight is 4.1602 grams.  A 99% confidence interval for the true weight of this specimen would be?

# Statistic question?

If we have an SRS of 1600 students and the sample mean = 148.  Compare with an SRS of 900 students with the margin of error for a 95% confidence interval of µ is ?  the answer should be...

# Statistics

A single-server queuing system with an infinite calling population and a first-come, first-served queue discipline has the following arrival and service rates: λ = 36 customers per hour...

# Statistics

An immigration agent at an airport, on an average, could process 15 entrants in one hour, if he was busy all the time. On an average, an entrant arrives at his station at every 5 minutes. The agent...

# What is the probability that a random sample of 17 persons will exceed the weight limit of 3,434 pounds?

The weight of people in a small town in Missouri is known to be normally distributed with a mean of 186 pounds and a standard deviation of 29 pounds. On a raft that takes people across the river,...