07/19/21

Probability Question
Based on historical data, your manager believes that 30% of the company's orders come from first-time customers. A random sample of 95 orders will be used to estimate the proportion of... more
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07/19/21

Probability Stats
A particular fruit's weights are normally distributed, with a mean of 472 grams and a standard deviation of 18 grams.If you pick 15 fruit at random, what is the probability that their mean weight... more
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07/18/21

How do you calculate MOE given Mean/Standard Deviation/Confidence Interval?

An example problem: You measure 40 turtles' weights, and find they have a mean weight of 51 ounces. Assume the population standard deviation is 13.4 ounces. Based on this, what is the maximal... more
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07/18/21

Confidence interval for the true proportion
out of 600 people sampled 516 receive flu vaccinations this year based on those construct 99% confidence interval for the true population proportion of people who received the flu vaccinations this... more
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07/18/21

Find the margin of error
Any recent poll 190 people were asked if they like dogs and 63% said they did find the margin of error of this poll at the 90% confidence level
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07/18/21

Express the confidence interval in Interval form

Express the confidence interval 80.2% +- 6.9% in interval form
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07/18/21

Trilinear inequality

Express the confidence interval 25.7% +- 4% in the form of a trilinear inequality. ___% < p < ___%
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07/18/21

Express the confidence interval
Express the confidence interval 24.3% < p < 41.3% in the for of p(p-hat) +- ME___% + - ____%
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07/18/21

Find the margin of error

If n=580 and p(p-hat) = 0.83, find the margin of error at a 95% confidence level.
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07/18/21

A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects.
After treatment with the​ drug, 30 subjects had a mean wake time of 91.5 min and a standard deviation of 40.5 min. Assume that the 30 sample values appear to be from a normally distributed... more
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07/17/21

What are the answers to these questions?
The mean college loan debt for graduating students is $37,172 with a standard deviation of $2,056. If all possible random samples of size 144 are taken from this population, determine the... more
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07/17/21

What are the answers to these questions?
According to a study in a journal of Human Reproduction, the length of human pregnancy has an average(mean) of 285 days with a standard deviation of 13 days. Assuming that the length of human... more
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07/17/21

What are the answers to these questions?
A recent poll randomly selects 200 registered voters residing in Nassau County. For this sample, 180 respondents stated that they support the federal government forgiving up to $50,000 in student... more
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07/17/21

Urgent! Standard Deviation Algebra 2 Problem!!
I keep getting different answers each time I solve this... help, please! Precipitation (in inches per year): 9.4, 17.0, 7.3, 7.0, 16.1, 5.4, 6.9, 8.5, 4.2, 9.2 Find the standard deviation. (Answer... more
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07/17/21

What is the difference between “being” and “having been”?
My mom has asked me quite often: What is the difference between “being” and “having been”? She still struggles with the difference between the two phrases. Although I’m aware of how they are... more
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07/15/21

Find the central angle 𝜃.
Subarc : 10 radius: 5
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07/15/21

Find the area of the sector of the circle whose radius is 3cm, the degree measure of the central angle is 43 degrees.
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07/15/21

Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three times
Consider an unfair coin that turns up heads one-fourth of the time. I toss the coin three timesand let X equal the number of heads. Find the probability distribution of X and then find its mean and... more
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07/14/21

The mean and variance of random sample of 64 observations were computed as 160 and 100 respectively .Compute 95% confidence limits for population mean
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07/14/21

the null hypothesis is 𝜇=90 and the alternative hypothesis is 𝜇≠90  using 𝛼=.05, find the following: (a) Test statistic: (b) P - value:
A random sample of 100 observations from a population with standard deviation 10.26 yielded a sample mean of 91.8.the null hypothesis is 𝜇=90 and the alternative hypothesis is 𝜇≠90  using 𝛼=.05,... more
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07/14/21

Conduct a test using a significance level of 𝛼=0.05.
The nicotine content in cigarettes of a certain brand is normally distributed with mean (𝜇) and standard deviation 𝜎= 0.1. The brand advertises that the mean nicotine their cigarettes is 1.5 mg.... more
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07/14/21

Calculate the following for a hypothesis test where 𝐻0:𝜇=260  and 𝐻1:𝜇<260

Suppose a random sample of  golfers be chosen so that their mean driving distance is  yards. The population standard deviation is . Use a 5% significance level.Calculate the following for a... more
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07/13/21

Use the formula to find the standard error of the distribution of differences in sample means
Use the formula to find the standard error of the distribution of differences in sample means, X1- X2Samples of size 105 from Population 1 with mean 93 and standard deviation 14 and samples of... more
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07/13/21

Consider random samples of size 86 drawn from population A with proportion 0.44 and random samples of size 60 drawn from population B with proportion 0.16 .
Consider random samples of size 86 drawn from population A with proportion 0.44 and random samples of size 60 drawn from population B with proportion 0.16  ... more
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07/12/21

Geometry, Please I Need Help!
A dilation has center (0, 0). Find the image of each point for the given scale factor. C(0,4);D(1/2)(C)Answer options:A. (1/2, 0))B. (4,0)C. (0,2)D. (1/2, 4/1)
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