Questions LLC
Login
or
Sign Up
Ask a New Question
Categories
STAT
Questions
To determine the relative effectiveness of different study strategies for the SAT, suppose three groups of students are randomly
4 answers
asked by
Anonymous
1,756 views
A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that
5 answers
asked by
Cathy
3,585 views
a given normal distribution with u=70 and o=6.
a- what is the probability of a randomly drawing a sample of n=9 with a mean
1 answer
asked by
IEN
354 views
A random variable X2 assumes only positive value.?
2 answers
asked by
azriel ed pagayunan
580 views
Let X be equal to the number of heads from tossing a coin twice. Verify that the following is the probability mass function of
1 answer
asked by
Michelle
317 views
Determine the mean and standard deviation of the random variable for which the probability mass function is defined as follows:
P
1 answer
asked by
Michelle
343 views
Airline overbooking is a common practice. Many people make reservations on several flights due to uncertain plans and then
2 answers
asked by
Michelle
557 views
The inside diameter of a manufactured cylinder is believed to follow a normal distribution centered at 5.00 inches with standard
1 answer
asked by
Michelle
444 views
Electricalc has determined that the assembly time for a particular electrical component is normally distributed with a mean of
2 answers
asked by
Michelle
494 views
If ì1 and ì2 represent the mean depression score for male teens and female teens respectively, which of the following is the
1 answer
asked by
Anonymous
391 views
Grain is fortified with vitamins at the factory when processed. But, before the product reaches the consumer, some of the
3 answers
asked by
Anonymous
1,150 views
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that
2 answers
asked by
Anonymous
689 views
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that
1 answer
asked by
Anonymous
364 views
One of the conditions that allows us to use ANOVA safely is that of equal (population) standard deviations. Can we assume that
1 answer
asked by
Anonymous
377 views
Do you view a chocolate bar as delicious or as
fattening? Your attitude may depend on your gender. In a study of American college
4 answers
asked by
Nickie
1,256 views
Functional foods are those containing nutritional
supplements in addition to natural nutrients. Examples include orange juice
2 answers
asked by
Nickie
838 views
Numerous studies have found that males report higher
self-esteem than females, especially for adolescents (Kling, Hyde, Showers,
1 answer
asked by
Nickie
691 views
An independent-measures research study compares three treatment conditions with a sample of n = 10 in each condition. The sample
1 answer
asked by
Tracy
1,248 views
Calculate SP (the sum of products of deviations) for the
following scores. Note: Both means are decimal values, so the
2 answers
asked by
Tracy
1,745 views
The distribution of heights of a population of adults is approximately normal with mean 66 inches and SD 2.5 inches.
1.
4 answers
asked by
HELPPPPP
584 views
A population has a standard deviation ó of 23 units. (Give your answers correct to two decimal places.)
(a) Find the standard
1 answer
asked by
Jane
419 views
Explain what each of the three most widely used measures of central tendency indicate to a psychological researcher.
1 answer
asked by
Jaky
397 views
You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 15 and a sample
3 answers
asked by
Tammy
480 views
You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a
1 answer
asked by
Tammy
469 views
Given a sample size of 18, with sample mean 660.3 and sample standard deviation
95.9, we are to perform the following hypothesis
3 answers
asked by
Jacky
567 views
Lucinda used ANOVA to test if there were statistically significant differences between the five conditions of her independent
1 answer
asked by
Jacky
442 views
Assume that women’s heights are normally distributed with a mean given by µ =
64.6 inches and standard deviation given by σ =
3 answers
asked by
Jacky
1,197 views
The score on a test are normally distributed with a mean of 75 and a standard deviation of 6. If the professor wishes to give
1 answer
asked by
Jacky
441 views
A certain personality index postulated by Professor Bailey is normally distributed, with a mean of 0.4 and a variance of 0.0004.
1 answer
asked by
Jacky
400 views
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a
2 answers
asked by
Jacky
594 views
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a
2 answers
asked by
Jacky
660 views
The Cox family has 4 boys.
•What is the probability of a 4-child family having 4 boys? •What is the probability that the next
3 answers
asked by
Jacky
482 views
A researcher is examining the relationship between color preference and gender. A sample of 30 men and 30 women is obtained and
3 answers
asked by
Jacky
818 views
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a
3 answers
asked by
Jacky
763 views
Given a sample size of 18, with sample mean 660.3 and sample standard deviation
95.9, we are to perform the following hypothesis
1 answer
asked by
Jacky
442 views
Suppose adults in a particular town drive a mean of 65 mph with a standard deviation of 15 mph. Using the normal curve table,
a.W
3 answers
asked by
Jacky
1,735 views
it is estimated that 17% of americans have blue eyes. A random sample of 9 americans is selected. Find the probability that the
2 answers
asked by
Anonymous
667 views
A college faculty consists of 400 men and 250 women. The college administration wants to draw a sample of 65 faculty members to
2 answers
asked by
CEDRA
961 views
1. In a study of the income of U.S. factory workers, a random sample of 100 workers shows a sample mean of $35,000. Assume that
2 answers
asked by
Hugh
620 views
You have been hired as a consultant for a company that would like to start a new marketing campaign to increase their online
1 answer
asked by
KEGY
596 views
A manufacturer of a new car claims the typical car will average 32 mpg of gasoline. An independent consumer group is skeptical
1 answer
asked by
Serena P.
697 views
The mean weight of all 20-year old women is 130 pounds. A random sample of 30 women athletes who are 20 years old showed a
2 answers
asked by
Serena P.
804 views
The Probability that a randomly selected commuter listens to audiobooks during their commute is 0.49. Suppose that a sample of
2 answers
asked by
Anonymous
566 views
The probability of getting a certain disease is 0.2. A certain test is available which returns a positive result 90% of the time
3 answers
asked by
Need Help Urgent
554 views
Jet blue states the average air fare from Toronto to LA is $1455 with a SD of $123.56. What is the 99% confidence interval with
1 answer
asked by
MAX
427 views
You will need a binomial table for n = 20 for this problem. Suppose that a quiz consists of 20 True-False questions. A student
3 answers
asked by
Andrew
1,442 views