8,918 Answered Questions for the topic statistics

Statistics

09/22/23

f you pick one fruit at random, what is the probability that it will weigh between 503 grams and 632 grams
A particular fruit's weights are normally distributed, with a mean of 566 grams and a standard deviation of 39 grams.If you pick one fruit at random, what is the probability that it will weigh... more
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Statistics

09/22/23

he heaviest 4% of fruits weigh more than how many grams?
A particular fruit's weights are normally distributed, with a mean of 715 grams and a standard deviation of 14 grams.The heaviest 4% of fruits weigh more than how many grams?Give your answer to the... more
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Statistics

09/20/23

For a population with a mean score of 250 and a standard deviation of 47, how do you convert a z score of 0.54 to a raw score?

For a population with a mean score of 250 and a standard deviation of 47, how do you convert a z score of 0.54 to a raw score?
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09/20/23

Please solve this question
In January 2010, a team of epidemiologists identified a sample of 12,525 women, 50- 65 years of age, in Denver, for a study of osteoporosis. Tests indicated that 6% of these women already had... more
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Statistics

09/20/23

P(X < 12.2 years) = ? and warranty = ? years
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17.7 years and a standard deviation of 2.3 years.Find the probability that a... more
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Statistics

09/20/23

Construct the 95% confidence interval for the difference between the population means
Xbar 1 = 31.0Stand Dev =94.3N1 = 29Xbar 2 =26Stand Dev 2 =90.8N2 =29I do not understand the formula.I am looking for step by step with calculations, For an example the first part of the formula is... more
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Statistics

09/19/23

Find P7, which is the length separating the shortest 7% rods from the longest 93%.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 104.3-cm and a standard deviation of 1.6-cm.Find P7, which is the length separating the shortest... more
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Statistics

09/19/23

The 2% of items with the shortest lifespan will last less than how many years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.5 years, and standard deviation of 1.6 years.The 2% of items with the shortest lifespan will last less... more
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Statistics Psychology

09/17/23

What do these P value numbers mean in stats....
P = 0.606 and p = 0.448
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Statistics

09/17/23

Fisher's Limiting spectral distribution
Fisher's Limiting Spectral Distribution Fs,t(x) = (1-t/2pi*(s+tx))sqrt((b-x)(x-a). where a is less than equal to x and x is less than equal to b. a = (1-h)^2/(t-t^2), b= (1+h)^2/(1-t)^2 , h=... more
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Statistics

09/14/23

(a) Determine the distribution of Z = X + Y if X ∼ f1(x) and Y ∼ f2(y) are independent. (b) Assume that X and Y both follow a uniform distribution on [0, 1], determine the distribution of Z = X + Y.
Note: the 1 and 2 in f1(x) and f2(x) are subscripts. This is introduction to Loss Models
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Statistics

09/13/23

What is the P(accept shipment)=
A pharmaceutical company receives large shipments of ibuprofen tablets and uses an acceptance sampling plan. This plan randomly selects and tests 20 tablets, then accepts the whole batch if there... more
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Statistics

09/13/23

INTERVAL ESTIMATION
Jakarta is a city that is densely populated. The average apartment rental cost has reached IDR 3,000,000 per month with a standard deviation of IDR 700,000 per month. If 50 tenants are taken, the... more
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Statistics

09/12/23

stats probability

A pharmaceutical company receives large shipments of ibuprofen tablets and uses an acceptance sampling plan. This plan randomly selects and tests 29 tablets, then accepts the whole batch if there... more
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Statistics Math Algebra 1 Algebra 2

09/12/23

Registration as a tutor
Hi,I am looking for tuition to teach, so I want to get registered as a tutor. How can I register myself?
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Statistics

09/11/23

Estimate the number of newborns whose weight was less than 5136 grams
A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 797 babies born in New York. The mean weight was 3464 grams with a standard... more
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Statistics

09/08/23

I used a tutor for one session, but don't need him anymore and want to cancel. I already sent him a message telling him so, is there anything else I need to do?
Aside from telling the tutor that we no longer need him, is there anything else to do?
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Statistics

09/07/23

Probability mass function
Probability mass functionf(x) = 4x + 2 / 50x = 0, 1, 2, 3, 4Determine the mean and variance of the random variable. Rounded 2 decimal places.
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Statistics

09/07/23

Statisics measurements
Thickness measurements of a coating process are made to the nearest hundreth of a millimeter. The thickness measurements are uniformly distrubuted with values 0.13, 0.14, 0.15, 0.16, 0.17.... more
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Statistics

09/06/23

Interval Confidence Intervals
Hi, I am getting stuck on the steps to find the correct result for an Interval Confidence Interval:A random sample of 115 observations results in 46 successes.Construct the 90% confidence interval... more
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Statistics

09/06/23

Testing: H 1 : χ 2 ≠ 7.46 Your sample consists of 41 subjects, with a variance of 2.48. Calculate the test statistic, rounded to 2 decimal places. χ 2 =
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Statistics

09/06/23

How to find power test ?

A past study on the reaction time of children with cerebral palsy reports a mean of 1.6 seconds on a particular task. Aresearcher believes that the mean reaction time can be reduced by using a... more
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Statistics

09/06/23

How to solve the power test without software?

1. A past study on the reaction time of children with cerebral palsy reports a mean of 1.6 seconds on a particular task. A researcher believes that the mean reaction time can be reduced by using a... more
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Statistics

09/06/23

How yo solve and how to do confidence interval for one tail test ??
News agencies are taking polls to try to figure out the general population’s opinions on an election poll. Suppose a female candidate wants to see how much percentage of people will vote for her.... more
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Statistics

09/06/23

Find the percentile rank
The average weekly earnings in dollars for various industries are listed below. Find the percentile rank of each value. Round to the nearest whole percentile.455, 480, 459, 651, 499, 652The... more
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