851 Answered Questions for the topic Statistics Question
04/29/20
Regression Help
The following table gives information on the amount of sugar (in grams) and the calorie count inone serving of a sample of 13 varieties of Kellogg’s cereal.
Sugar...
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04/21/20
Two Population Means
At a recent faculty meeting, we were wondering if freshmen have more free time than seniors. We took a sample of 25 freshmen and 23 seniors. Each student was asked to record the amount of free time...
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03/02/20
Statistics question- Testing a Hypothesis (Type I and Type II errors)
Remember our bank that’s sending out DVDs to try to get customers to make payments on delinquent loans? It is looking for evidence that the costlier DVD strategy produces a higher success rate than...
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12/04/19
Statistics Two-Sample t Statistic
Is there a difference in the amount of airborne bacteria between carpeted and uncarpeted rooms? In an experiment, seven rooms were carpeted and seven were left uncarpeted. The rooms are similar in...
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11/26/19
Statistics Confidence Interval
In a randomized comparative experiment on the effect of dietary calcium on blood pressure, researchers divided 48 healthy white males at random into two groups. One group received calcium; the...
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11/24/19
Statistics Confidence Interval
Europeans have been more skeptical than Americans about the use of genetic engineering to improve foods. A sample survey gathered responses from random samples of 862 Americans and 12083 Europeans....
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Statistics Question
10/08/18
On an exam whose scores followed a normal distribution, a student's z-score was −1.
What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)
Statistics Question
10/07/18
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 201 lb.
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 150 lb and 201 lb. The new population of pilots has normally distributed weights...
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Statistics Question
09/29/18
Statistical poll question
I interviewed 100 people. I asked them to look at a photograph of 2 men. One is 17 years old and the other is 20 years old. The people interviewed had to guess who was the older looking man in the...
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Statistics Question
09/25/18
A pie chart shows the relative market share of cola products. The slaves for Pepsi-Cola has a central angle of 90°. What is its market share
Just a queation
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Statistics Question
09/23/18
which of the following would be the mean of this data set 5,17,22,56,4,2,33,21
A. 16.90
B. 20.00
C. 18.06
D. 19.00
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Statistics Question
09/10/18
What is the percentage of the men between the following values?
Heights of men on a baseball team have a bell-shaped distribution with a mean of 175 cm and a standard deviation of 8 cm. Using the empirical rule, what is the approximate percentage of the men...
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Statistics Question
09/04/18
ONe card is randomly selected from a stadard 52 card deck. Which of the following gives the probability that the card is a black ace?
Statistics question
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Statistics Question
08/29/18
calculating probalities using a confidence interval of sample size
For a random sample sample of 150 households in a large metropolitan area, the number of households in which at least one adult is currently unemployed and seeking a full time job is 12. Using a...
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Statistics Question
08/28/18
what is the expected number of correct answers Jason will get on the 12-question quiz?
If he randomly selects responses between the 3 remaining choices for each question, what is the expected number of correct answers Jason will get on the 12-question quiz?
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Statistics Question
08/26/18
20 cars , 7 have defects If I pull 2 randomly what probability 2 have defects?
20 cars, 7 have defects If I pull 2 randomly what probability 2 have defects?
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Statistics Question
08/11/18
what is the probability of spinning all the colors of a 4 color spinner in 5 turns
There are no additional details. There are no additional details. There are no additional details. There are no additional details.
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Statistics Question
08/11/18
Statistics question
Suppose we are with a real estate agency that hasthe following houses listed in a specific geographicarea. $150,000; $146,000; $152,000; $155,000;$143,000; $157,000; $180,000; $148,000;...
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Statistics Question
08/03/18
what is the probability of getting a total of 7 or 11, if two dice are rolled?
statistics course
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Statistics Question
07/27/18
Normally distributed
Eleanor scores 680 on the mathematics part of the SAT. The distribution of SAT math scores in recent years has been Normal with mean 555 and standard deviation 79.Gerald takes the ACT Assessment...
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Is this question is a combination or a permutations? and how to solve it step by step ?
How many licence plates of three symbols (letters and digits) can be made using at least one letter in each?
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Statistics Question
07/23/18
What is the z score of x=9, if 9 is 1.5 standard deviations to the left of the mean?
I would like some help with this question and explanation.
Statistics Question
07/18/18
usual and unusual values
A certain group of test subjects had pulse rates with a mean of 80.580.5 beats per minute and a standard deviation of 10.510.5 beats per minute. Would it be unusual for one of the test subjects to...
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Statistics Question
07/18/18
Normal Distribution
How do I tell if my data is normally distributed looking at my data on the Shapiro-Wilk output?
Male:
Statistic: .966
df: 14
Sig. .822
Female:
Statistic: .912
df: 14
Sig:...
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