8,957 Answered Questions for the topic statistics

06/04/22

Answer the following :
A Senior High School in the Division of Negros Oriental reported that out of 5000 Academic Track students, 1800 are in General Academic Strand (GAS), 2050 are in HUMSS, while all the rest belong to... more
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06/04/22

Which of the following is not a bivariate data?
9. Which of the following is not a bivariate data?A. Study a group of college students to find out their height and their weightB. Study a group of diabetic patients to find their weightsC. Study a... more
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06/02/22

Should we adjust for multicollinearity before or after feature selection?
I am conducting a regression analysis with a data set that has high multicollinearity with high VIF values. I adjusted for it before my feature selection, and I also tried adjusting for it only... more
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Statistics

06/01/22

explain please.
A manufacturer knows that their items have a lengths that are skewed right, with a mean of 9.5 inches, and standard deviation of 1.8 inches.If 48 items are chosen at random, what is the probability... more
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Statistics Sas

06/01/22

glimmix dist=lognormal vs autoreg

I am working with time series data in SAS proc glimmix. When I change the dist=lognormal, the models fit much better. My question is, would this be an acceptable approach vs autoreg? From my... more
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Statistics

05/31/22

How do I solve for mean and standard deviation using two percentiles?
Consider a normal distribution curve where 60-th percentile is at 17 and the 5-th percentile is at 9. Use this information to find the mean,  , and the standard deviation,  , of the distribution.
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Statistics

05/31/22

A code is composed of letters and digits. Determine how many different codes of 2 digits followed by 5 letters are possible if the letters and digits cannot be repeated.
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Statistics

05/30/22

statistics problem
1. You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 19%. You would like to be 94% confident that... more
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Statistics Math Mathematics

05/30/22

Sample Sizes Confidence Intervals
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 23%. You would like to be 99% confident that your... more
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Statistics Math Mathematics

05/30/22

Stats Confidence Intervals Sample Size
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 23%. You would like to be 99% confident that your... more
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Statistics Math Mathematics

05/30/22

Statistics: Confidence Intervals (Sample Size)
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.11. You would like to be 96% confident that... more
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Statistics Math Mathematics

05/30/22

Sample Size Confidence Intervals
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=66.2. You would like to be 90% confident that... more
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Statistics Math Mathematics

05/30/22

Confidence Intervals (Sample Size)
You want to obtain a sample to estimate how much parents spend on their kid's birthday parties. Based on previous study, you believe the population standard deviation is... more
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Statistics

05/30/22

What is the probability that it rained during the race
Off-road motorbike racing can be dangerous, especially when it rains. It has been found that it rains during18% of races. When it does not rain, there is a 5% chance that Dwayne (a rider) will get... more
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05/30/22

(a) state the null and alternative hypothesis, (b) select and compute the test statistic, (c) determine the critical value and the rejection region, and (d) draw a conclusion. are my answers correct?
Direction: In the following problem, (a) state the null and alternative hypothesis, (b) select and compute the test statistic, (c) determine the critical value and the rejection region, and (d)... more
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Statistics Math

05/30/22

Confidence Intervals estimating the mean
ou must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures: 18.5, 22.1, 24.3, 15.2, 34.9, 10.6, 33.8, 14.8, 13, 32.2, ... more
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Statistics

05/29/22

explain please.
The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 120 and standard deviation of 16 .Someone qualifies as having Stage 2 high blood pressure if their... more
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Statistics

05/28/22

I don't get it, please explain
Based on a sample of 50 textbooks at the store, you find an average of 60.62 and a standard deviation of 18.4.The point estimate is:  (to 3 decimals)The 95 % confidence interval (use z*)... more
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Statistics

05/28/22

I don't get it, please explain
You wish to test the following claim (HaHa) at a significance level of α=0.10α=0.10.      Ho:μ=51.8Ho:μ=51.8      Ha:μ<51.8Ha:μ<51.8You believe the population is normally distributed, but you... more
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Statistics

05/25/22

Suppose a lab is developing a robust new test to look for diabetes in children
Suppose a lab is developing a robust new test to look for diabetes in children. If a child actually has diabetes, the probability that the test will be positive is 80%, indicating they have... more
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Statistics

05/25/22

Suppose, at a local movie theater...
Suppose, at a local movie theatre, the amount of money that a man spends at the concession has an average of $17 and a standard deviation of $4.80. As well, the amount of money that a woman spends... more
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Statistics

05/25/22

probability question need help
Casey is conducting market research on the amount typically spent on the purchase of a first vehicle. Casey has determined that the average cost of a first vehicle is $7800, and that the... more
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Statistics Algebra Maths

05/25/22

Equation rearranging

Hi I would like to know now to rearrange multiple regression equation to find the value of an independent variable (x2)y= (b1x1)+(b2x2)+aany help would be most appreciated
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Statistics Hypothesis

05/25/22

statistics homework question. please help me :/
You have been asked to conduct a national study of urban home selling prices to determine if there hasbeen an increase in selling prices over time. For this purpose, you randomly selected some... more
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Statistics

05/25/22

stat stat stat stat
The duration of an inspection task is recorded in seconds. It is claimed thatthe inspection time is less than 100 seconds. (a) Test this claim at 0.05 significance level. (b) Calculate the... more
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