Calculus and Above

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A group of statistics students decided to conduct a survey
A group of statistics students decided to conduct a survey at their university to estimate the average (mean) amount of time students spent studying per week. They sampled 500 students and found a mea… read more
Kofi
PhD in Statistics
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I need help with the following statistics question Determine
Hi I need help with the following statistics question Determine the margin of error for the confidence interval for the proportion: <0.53<μ0.772 … read more
Tom
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The claim is that the IQ scores of statistics professors are
The claim is that the IQ scores of statistics professors are normally​ distributed, with a mean greater than 127. A sample of 21 professors had a mean IQ score of 128 with a standard deviation of 2. F… read more
Kofi
PhD in Statistics
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Changes in the size of the Confidence Interval: Suppose you
Changes in the size of the Confidence Interval: Suppose you are constructing confidence intervals about a mean or proportion. Answer the following questions about the size (width) of the confidence in… read more
Sandhya_sharma
Master's Degree
Master's Degree
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Looking to get some help with my stats homework. Heres a
Hey im looking to get some help with my stats homework … read more
Sandhya_sharma
Master's Degree
Master's Degree
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True or False. The width of a confidence interval is equal
True or False. The width of a confidence interval is equal to twice the value of the margin of error. Explain your answer.… read more
Kimberley Wright
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Im having issues with my stat homework. So the question is
ok so the question is find the minimal sample size required so that for a 90% confidence interval, the maximal margin of error is E=0.5 … read more
R.R. Jha
Bachelor's Degree
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I have a question about a psychology research article that
I have a question about a psychology research article that reports the results in confidence interval. I don't know how to interpret outcome. Is anyone familiar with this type of data?… read more
GLENN GILONGOS
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3. A research institute polled asked repondents if they acted
3. A research institute polled asked repondents if they acted to annoy a bad driver. In the poll n=2410 and x=1020 who said that they honked. Use 95% confidence level. a. find the best point estimate … read more
Stevewh
Teacher
Bachelor's Degree
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I need help whit the following 10 questions. 1. The probability
I need help whit the following 10 questions. 1. The probability that the actual population mean will be outside of the 98% confidence interval is: 1 % 2 % 4 % 5 % 2. The Chi-square test is very sensit… read more
SusanAthena
Master's Degree
Master's Degree
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The questions that I need answer are already on the site just
The questions that I need answer are already on the site just need the answers for 1. The Chi-square test is very sensitive to small differences in frequency differences. (Points : 1) True False Quest… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
1. The Chi-square test is very sensitive to small differences
1. The Chi-square test is very sensitive to small differences in frequency differences. (Points : 1) True False Question 2. 2. The probability that the actual population mean will be outside of a 98% … read more
Ryan
Bachelor's Degree
4,665 satisfied customers
The same statistic equation is used to calculate a value for
1. The same statistic equation is used to calculate a value for a hypothesis test and for estimation. What value is calculated for each? a. The hypothesis test calculates a t value and estimation calc… read more
Chirag
Master's Degree
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For a random sample X (with a line over top) =83 and n=625;
For a random sample X (with a line over top) =83 and n=625; assume standard deviation=15 1. Test H Null = 80 against H1 (alternative) is not equal to 80. ( level of sig = .05) What does this tell you … read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Please help me with this test! I have no idea! :( 5.The test statistic in a two tailed test is z=-1.63. Find the P-value. 6. Assume that a hypothesis test of the given claim will be conducted. Identif… read more
Math-John
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A sanitation department is interested in estimating the mean
A sanitation department is interested in estimating the mean amount of garbage per bin for all bins in the city. In a random sample of 40 bins, the sample mean amount was 47 pounds and the sample stan… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Rolling a die is this a discrete or continuous random variable?
Statistics: 1. When rolling a die, is this an example of a discrete or continuous random variable? Explain your reasoning. 2.Calculate the mean and standard deviation of the probability distribution c… read more
Scott
Master's Degree
18,670 satisfied customers
Statistics: How does sample size affect the length of the confidence
Statistics: How does sample size affect the length of the confidence interval? How does the margin of error affect the length of the confidence interval?… read more
Scott
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