8,918 Answered Questions for the topic statistics

Statistics Math

02/03/23

Find the probability of the following
The probability that a married man watches a certain television show is 1/2 and the probability that a married woman watches the show is 2/5. The probability that a man watches the show, given that... more
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Statistics Math

02/03/23

Multiple-choice test probability
A multiple-choice test has 4 choices, one of which is a correct answer. If a student just guesses the answer, what is the probability that he has exactly 1 correct answer in 3 successive unrelated... more
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Statistics Math

02/03/23

Find the probability
The probability that a patient recovers from a delicate heart operation is 0.9. What is the probability that exactly 2 of the next 4 unrelated patients who have this operation will not recover?
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Statistics Math

02/03/23

Probability Question
A shipment of 20 units of desktop computers contains 5 defective units. If 3 units are delivered in Manila at random, what is the probability that these 3 delivered units are defective?
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Statistics

02/03/23

Flipping a biased coin
A bias coin is flipped four times. If the probability of ‘tails’ occurring is twice the probability of ‘heads’ occurring, find the probability that 3 ‘heads’ occur.
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Statistics

02/03/23

Statistics class
Of the people who fished at Clearwater Park today, 40  had a fishing license, and 10 did not. Of the people who fished at Mountain View Park today, 28 had a license, and 12 did not. (No one fished... more
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Statistics

02/03/23

Help me solve this
P(-0.76 < Z < 1.93 )
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Statistics

02/01/23

Find the change score that is 2.2 standard deviations below the mean. (Round your answer to one decimal place.)
One hundred teachers attended a seminar on mathematical problem-solving. The attitudes of a representative sample of 12 of teachers were measured before and after the seminar. A positive number for... more
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Statistics

02/01/23

STAT: Simple Standard Deviation
Is there a way to tell if one of many data sets has a greater sample standard deviation as well as the least sample standard deviation when the data sets are vertically place 0-4 with a vertical... more
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Statistics Probability

01/29/23

Find the probability that exactly two babies were born deaf.
According to a recent article the average number of babies born with significant hearing loss (deafness) is approximatelytwo per 1,000 babies in a healthy baby nursery. The number climbs to an... more
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Statistics

01/28/23

statistics and percentages
A student in a statistics class scored an 80%, 85%, and 90% on the first 3 tests. What must the student score on the last test to have at least a 87% in the class?
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Statistics Probability

01/28/23

What is the median IQ score for this sample? 99, 100, 105, 104, 102, 105, 105, 121, 104
IQ scores are collected from a sample of students at a large university. The scores are shown below.A. 102B.104C.105D.110
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Statistics Probability

01/27/23

Six different colored dice are rolled. Of interest is the number of dice that show a one.Find the probability that all six dice show a one.
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Statistics Probability

01/27/23

he average number of children a Japanese woman has in her lifetime is 1.37. Suppose that one Japanese woman is randomly chosen.
Find the probability that she has no children.Find the probability that she has fewer children than the Japanese average.Find the probability that she has more children than the Japanese average. 
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Statistics Probability

01/27/23

The maternity ward at Dr. Jose Fabella Memorial Hospital in Manila in the Philippines is one of the busiest in the world with an average of 60 births per day. Let X = the number of births in an hour.
What is the mean?What is the standard deviation?What is the probability that the maternity ward will deliver three babies in one hour? What is the probability that the maternity ward will deliver... more
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Statistics

01/27/23

Six different colored dice are rolled. Of interest is the number of dice that show a one.Find the probability that all six dice show a one.
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Statistics

01/27/23

I used 2.55 and 2.6 z critical value for calculating Interval Estimate but I still got them wrong. Please help.
The following table contains data on the number of pages printed per minute and the retail price for a random sample of printers. PPM(first column),Price (Second... more
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Statistics Math Probability

01/27/23

Linear Regressions (need help as soon as possible please!)
A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression... more
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Statistics

01/24/23

Use the given data in Microsoft Excel to find the best predicted value of the response variable.
The regression equation relating dexterity scores x and productivity scores y for the employees of a company is y=5.50+1.91x. Ten pairs of data were used to obtain the equation. The same data yield... more
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Statistics

01/24/23

A normally-distributed population has a mean μ = 132 and a standard deviation σ = 20. For a set of samples of size 60 taken from this population,
A normally-distributed population has a mean μ = 132 and a standard deviation σ = 20. For a set of samples of size 60 taken from this population, what is the z-value for the proportion of the... more
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Statistics

01/23/23

Help with this problem.

To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades:4.0 in a 5... more
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Statistics

01/23/23

Find the Mean of this Problem
Find the mean. Round your answer to 4 decimal places. Deliveries Each WeekFrequency 4 7 8 4 12 2 16 6
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Statistics Math

01/23/23

question in description

Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.55 and a standard deviation of 0.39. Using the empirical rule, what... more
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Statistics

01/21/23

Statistic Question (read below)
Healthy 10-year-old domestic kittens have an average weight of 28.5 oz with standard deviations of 8.25 oz. The distribution is approximately normal. A kitten is designated as dangerously... more
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Statistics

01/20/23

Find the probability of spinning blue on the first spin, cyan on the second spin, and cyan on the third spin.
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