945 Answered Questions for the topic Statistics Question

Statistics Question

06/02/16

Americans 18 and older, 20% are divorced. If 10 Americans aged 18 or older are randomly selected, find the probability that at least 2 of them are divorced.
can someone please show me how to do this
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Statistics Question

05/30/16

statistics question
Let Z be the standard normal random variable. Calculate the following and draw a picture illustrating each probability. (i) P(Z < 1.8) = (ii) P(Z > -1.2) = (iii) Find c such that P(Z >... more
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Statistics Question Statistics Probability Stats

05/18/16

Let P(A)=P(B)=0.42 and P(AnB)=0.13 Find P(A'?B')
Let P(A)=P(B)=0.42 and P(A∩B)=0.13   Find P(A'∪B')   solution   P(A'∪B')=P(A)+P(B)-P(A∩B)              =0.42+0.42-0.13=0.71   Is it correct?
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Statistics Question Statistics Algebra High School: Math

05/16/16

Help!!!!!!
in a distribution, the number 11 has a z-score of -1 and a standard deviation of 3. what is the value of the data with a z-score of 2?
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Statistics Question Statistics

05/13/16

Statstics: Find the Range, Variance, and Standard Deviation
Use the listed IQ Scores:    IQ: 96 89 87 87 101 103 103 96 127 126 101 96 93 88 94 85 97 114 113 124
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Statistics Question

05/11/16

Use technology to construct a 90?% confidence interval estimate of the mean amount of mercury in the population.
Listed below are the amounts of mercury? (in parts per? million, or? ppm) found in tuna sushi sampled at different stores. The sample mean is 0.941 ppm and the sample standard deviation is 0.377... more
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Statistics Question Statistics Word Problem Stats

05/05/16

Please help with a statistics question.
THE MEAN TOTAL CHOLESTEROL FOR A POPULATION OF MEN BETWEEN THE AGES OF 20 AND 29 IS180 MICROGRAMS PER DECILITER WITH A STANDARD DEVIATION OF 34.8. A HEALTHY TOTALCHOLESTEROL LEVEL IS LESS THAN 200,... more
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Statistics Question Statistical Tests

05/05/16

i need help with my statistics final
i need to know what type of test to use for the following questions1) Does Mark’s yards relate to the temperature during the start of the game?2) Does Mark’s year in college impact the amount of... more
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Statistics Question

05/05/16

statistic word problem
on the first semester there was 199 referrals and of those referrals there were 31 students with 3 or more referrals on the second semester year was 116 referrals and of those referrals there was... more
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Statistics Question

05/05/16

STATISTICS
The table summarizes results from 978 pedestrian deaths that were caused by automobile accidents.   Drivers Intoxicated-------Pedestrian... more
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Statistics Question

05/03/16

statistics
To gather data on a 1200 - acre pine forest in North Dakota, the U.S Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of... more
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Statistics Question

05/03/16

statistics
Suppose I roll a one four-sided die and one six-sided die. Let X be the sum of the dots showing on two die. How do I find the probabilty distribution of X?
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Statistics Question

04/29/16

Statistics
Find the probability of exactly two success in five trials of a binomial experiment in which the probability of success is 50%. Round to the nearest tenth of a percent.
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Statistics Question

04/28/16

The continuity correction.
A television network claims that its current affairs program regularly attracts 34% of the total viewing audience. If 400 people, who were watching television at this time, were randomly surveyed,... more
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Statistics Question

04/27/16

The number of freshmen entering college in a certain year is 621. What type of data is 621?
The number of freshmen entering college in a certain year is 621. What type of data is 621?
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Statistics Question

04/27/16

statistics. Would like some explanation in detail please.
135 145 95 140 135 95 110 50 90 165 110 125 80 125 130 110 25 75 65 100 60 125 115 135 95 90 140 40 75 50 130 85 100 160 135 45 135 115 75 130The waking times ( in minutes past 5:00 A.M.) of 40... more
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Statistics Question Confidence

04/25/16

Which of the following descriptions of confidence intervals is correct?
Which of the following descriptions of confidence intervals is correct? (Select all that apply) a. If a 95% confidence interval contains 0, then the 99% confidence interval contains 0 b. If a 99%... more
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Statistics Question

04/24/16

Probability
Two cards are selected from a standard deck of 52 playing cards. The first is replaced before the second card is selected. Find the probability of selecting a spade and then selecting a... more
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Statistics Question

04/21/16

Statistics
Roxie Balboa, the fighter that you are willing to represent had 50 fights, winning 47 and losing 3 fights. Calculate the possibility that she will win her next fight. Calculate the possibility that... more
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Statistics Question Interval Confidence

04/20/16

Statistics: A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television
A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television each week was 12 hours and the standard deviation was 2.5 hours. The mean time... more
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Statistics Question

04/20/16

I need help with Stats
A personality scale has scores that are normally distributed with a mean of 150 and a standard deviation of 20. 1. What proportion of people score lower than a percentile rank=143 P(X<143)? 2.... more
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Statistics Question Statistics Probability & Statistics

04/20/16

Probability Question
The barton Company manufactures automobile charge indicator gauges. Under test conditions, these gauges are supposed to read 0 volts. However, some gauges read slightly more than 0 volts and some... more
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Statistics Question

04/19/16

An automobile manufacturer claims that their jeep has a 29.1 miles/gallon (MPG) rating.
An automobile manufacturer claims that their jeep has a 29.1 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 200 jeeps they... more
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Statistics Question Statistics Stats

04/19/16

use the given degree of confidence and sample data to construct a confidence interval for the population proportion p
If 92 adults selected randomly from one town, 70 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance 
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Statistics Question Statistics Statistic Stats

04/17/16

Find the best point estimate of the proportion of people who wear hearing aids if, in a random sample of 640 people, 73 people had hearing aids
Solve the proble. Round the point estimate to the nearest thousandth.
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