8,918 Answered Questions for the topic statistics

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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05/23/22

Mr. Santos, a garment store owner, claimed that the brand of sweatpants his customers prefer is Brand A compared to Brand B. He conducted a survey of 100 customers.
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 Calculus

05/23/22

As Tutor on Wyzant , I want to ask one Question

I submitted sessions on wyzant. The student left 5 star rating and good feedback.After that he removed his Payment on file. Now he has no payment on file.Wyzant will pay me as per schedule after... more
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Statistics

05/23/22

Six sigma Question help
Which of the following is NOT a measure of process capability?DPMOSigma ValueZ benchRange
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Statistics Math Mathematics Problem

05/22/22

How many wins would a team need to win in a best of 28 game series?

How many wins would a team need to win in a best of 28 game series?
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Statistics Math Mathematics Problem

05/22/22

How many wins would a team need to win in a best of 28 game series?

How many wins would a team need to win in a best of 28 game series?
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Statistics

05/21/22

probability question
Bag A contains 7 blue and 3 red marbles. Bag B contains 6 blue and 4 red marbles.Firstly, a marble is chosen at random from Bag A and and placed in Bag B. Secondly, a marble is chosen at random... more
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05/21/22

 Mr. Santos, a garment store owner, claimed that the brand of sweatpants his customers prefer is Brand A compared to Brand B. He conducted a survey of 100 customers.

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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05/21/22

Answer the following questions.
A certain "Plantita" wants to test whether some plant species are more salt-tolerant than others. Some key variables she might measure are the following: the amount of salt she must add to the... more
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Statistics Math Probability Maths

05/20/22

(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.
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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05/20/22

Construct a scatter plot and identify the trend of data as to form, direction and trend.

Application (Performance Task)Construct a scatter plot on the problems below and identify the trend of the data as to form, direction and trend.1. A doctor collected data on how many hours children... more
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05/19/22

Solve the following.

Compute the value of the test statistic for each test using the given information.1. Testing Ho: p = 0.48 vs Ha: p <0.48 at a = 0.10, n = 540, p = 0.582. Testing Ho: p = 0.94 vs Ha: p > 0.94... more
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Statistics Math

05/19/22

The coast guard is expecting grow to over 24,000 members by this year. What is the null and alternative hypothesis?
This was dropped on us by out stats teacher, and I think I know the answer, but I'd just like to make sure
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Statistics

05/18/22

How do I calculate probability?
basketball player makes a foul shot 80% of the time what is the, probability that he will make 12 in a row
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