8,918 Answered Questions for the topic statistics

Statistics

05/04/22

Identify whether the following situations refer to a parameter or statistic. (a) Parameter (b) Statistic
1. A researcher wants to determine the mean electric consumption of the families in a barangay. From a random sample of families, a mean consumption of 130 kWh was identified. 2. A school principal... more
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Statistics

05/04/22

Find the corresponding area between z=0 and each of the following.

1) z=1.842) z=-2.553) z=1.594) z=1.015) z=2.036) z=2.317) z=2.008) z=2.999) z=0.9910) z=0.59
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Statistics

05/03/22

I cannot figure out the P and Z please help

In a certain school district, it was observed that 24% of the students in the element schools were classified as only children (no siblings).  However, in the special program for talented and... more
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05/03/22

Cross validation of OPLS-DA and PLS regression models
I obtained for the first time strange results from my OPLS-DA and PLS regression models, the CV ANOVA was (-nan(ind)), the SD residual was (inf), and the MS residual was (inf), moreover, the F test... more
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Statistics Math Probability

05/02/22

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 47 ounces and a standard deviation of 8 ounces.
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 47 ounces and a standard deviation of 8 ounces.Use the Empirical Rule to... more
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Statistics Math Probability

05/02/22

Company XYZ knows that replacement times for the quartz time pieces it produces are normally distributed with a mean of 12.5 years and a standard deviation of 0.6 years.
Company XYZ knows that replacement times for the quartz time pieces it produces are normally distributed with a mean of 12.5 years and a standard deviation of 0.6 years.(a) Find the probability... more
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Statistics

05/02/22

Out of 400 people sampled, 68 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.
___ < p < ___
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Statistics

05/02/22

In a recent poll, 490 people were asked if they liked dogs, and 47% said they did. Find the margin of error of this poll, at the 99% confidence level.
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Statistics

05/01/22

Confidence Interval
Express the confidence interval 50.4% ±7% in interval form.
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Statistics

05/01/22

Confidence Interval
Express the confidence interval 66.4%±7.6% in the form of a trilinear inequality.________% <p<______ %
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Statistics

05/01/22

Confidence Interval
Express the confidence interval 78.1%<p<92.3% in the form of ˆp±ME._______% ± ________%
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Statistics

05/01/22

If n=190 and ˆ p (p-hat) =0.54, find the margin of error at a 99% confidence level
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Statistics

04/30/22

If a 8 sided fair die that is numbered 1 to 8 is rolled once, find the probability of getting: (a) a number that is less than 2 OR at least 6, (b) a number less than 2 AND at least 6, (c) an even #

please give an explanation rather than just an answer. I'm trying to learn the material as well :)
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Statistics

04/29/22

If n=180 and ˆ p (p-hat) =0.2, find the margin of error at a 99% confidence level
If n=180 and ˆp (p-hat) =0.2, find the margin of error at a 99% confidence level
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Statistics

04/29/22

In a recent poll, 120 people were asked if they liked dogs, and 18% said they did. Find the margin of error of this poll, at the 95% confidence lev
In a recent poll, 120 people were asked if they liked dogs, and 18% said they did. Find the margin of error of this poll, at the 95% confidence lev
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Statistics

04/29/22

probability and Statistics
Suppose the height in inches of an adult male is normally distributed with μ = 70 inches and σ = 4 inches. What percentage of males have heights within one standard deviation of the mean?
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Statistics

04/29/22

Probability Question
Refer to the sample data for​ pre-employment drug screening shown below. If one of the subjects is randomly​ selected, what is the probability that the test result is a false​ positive? Who would... more
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Statistics Math Probability Maths

04/28/22

BBBASICSTAT8 6.2.501.XP
In the binomial probability distribution, let the number of trials be n = 3, and let the probability of success be p = 0.4012. Use a calculator to compute the following.(a) The probability... more
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Statistics Math Probability Maths

04/28/22

BBBASICSTAT8 6.2.018
The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase? This is called a one-time fling.... more
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Statistics Math Probability Maths

04/28/22

BBBASICSTAT8 6.2.019.MI
Sociologists say that 95% of married women claim that their husband's mother is the biggest bone of contention in their marriages (sex and money are lower-rated areas of contention). Suppose... more
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Statistics Algebra College Math

04/28/22

In a normal distribution, if mean is 8 and standard deviation is 1.5, how many percent of data fall
Show the complete solution: In a normal distribution, if mean is 8 and standard deviation is 1.5, how many percent of data falla.     Above 8.5?b.     Between 7.2 and 8.5?
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Statistics Probability

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Statistics Probability

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Statistics Math

04/27/22

Five number have a mean of 24, the mean of the three smallest numbers is 19 and the mean of the three largest numbers is 28 What is the median of the five numbers ?

Five number have a mean of 24, the mean of the three smallest numbers is 19 and the mean of the three largest numbers is 28 What is the median of the five numbers ? 20 21 22 23 24 25
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Statistics

04/26/22

Conclusion Confidence Interval
We have created a 95% confidence interval for μ with the result (148, 196). What conclusion will we make if we test H0: μ = 190 vs. Ha:μ ≠ 190 at α = 5%?Reject the alternative hypothesisReject the... more
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