8,918 Answered Questions for the topic statistics

Statistics Probability

12/17/21

According to a recent​ report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

a. Use the​ five-step p-value approach to hypothesis testing and a 0.01 level of significance to determine whether the proportion of college interns that had unpaid internships is different from... more
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Statistics Probability

12/17/21

In a​ one-tail hypothesis test where you reject only in the lower ​tail, what is the if zstat = +1.08
What is the P vlaue?
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Statistics Probability Stats

12/16/21

Probability Question
A thermostat is set on 70 degrees. A room temperature is distributed normally with the standard deviation of .1. What is the probability that the room temperature will be higher than 70.2 degrees?
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Statistics

12/16/21

If you randomly select three peanut M&M’s, compute that probability that at least one of them is blue.
 If you randomly select three peanut M&M’s, compute that probability that at least one of them is blue.According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s... more
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Statistics Math

12/16/21

math i need help asap
More and more people are abandoning national brand products and buying store brand products to save money. The president of a company that produces national brand coffee claims that 40% of the... more
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Statistics Math

12/16/21

i need help anyone?
According to a 2020 study, the average cost of gas, oil, tires, and maintenance on commuters who travel 15,000 miles per year in their own vehicles was $1770. A recent study based on 300 such... more
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Statistics Probability Maths

12/16/21

If the height of students in one school follows a normal distribution with a mean of 160 cm and a standard deviation of 5 cm. What is the percentage of the students with a height of 155-165 cm?
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Statistics

12/15/21

Math please help
A highway construction zone has a posted speed limit of 40 miles per hour. Workers working at the site claim that the mean speed of vehicles passing through this construction zone is at least 50... more
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Statistics

12/15/21

Find eight numbers such that the mean, the median, and the mode of the numbers are all 45, and no more than two of the numbers are the same.
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12/15/21

Population Dynamics

 In a survey of northern mountain ash seedlings in northern Ontario, researchers randomly placed eight 1.0 m by 2.0 m quadrats in a field that measured 100 m by 150 m. Estimate the population... more
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Statistics

12/15/21

Si r = 0.8, la proportion de la variabilité de Y qui n'est pas expliquée par X est
a) 0,20b) 0,80c) 0,64d) 0,36
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Statistics Probability

12/14/21

Statistics question
2) The number of auto parts that a company produces follows a normal distribution. The company has two independent production lines: Line 1 produces an average of 75 parts per day with a... more
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Statistics Math

12/14/21

poisson distribution
a manufacturing process produces on the average 1.2 defects per 100 units of output and the number of defects follows a poisson distribution. What is the probability that the next 500 units show... more
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12/14/21

FILLING ANOVA TABLE
The partial ANOVA table below shows the results of an experiment to test the effect of two factors (A and B) on the yield in a production process. The levels of each factor were selected... more
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Statistics Probability

12/13/21

A test was given to a group of students. The grades and major are summarized below. (New to this so full questions is uploaded to this screenshot) https://prnt.sc/22v7ooq
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Statistics Math

12/13/21

Statistics standard deviation
Employees at XYZ company work at an average of 55 hours per week with the standard deviation of 9 hours. Promotions are more likely for those employees in the upper 10% of the time they spend... more
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Statistics

12/12/21

Lower/Upper Limit, Margin of error, Sampe Size.

question What price do farmers get for their watermelon crops? In the third week of July, a random sample of 40 farming regions gave a sample mean of  = $6.88 per 100 pounds of watermelon. Assume... more
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Statistics Test Preparation Test

12/11/21

test USED for two variables
what type of test would be use for IV days of poor mental health, and DV hours spent on the web?
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Statistics

12/09/21

Hypothesis Test For Multiple Population Proportions
Consumer Reports took a survey of users of two major mobile phone companies. They asked if the individuals were satisfied with their phone service. Consider the following... more
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Statistics

12/09/21

Statistics Problem

A group of foreign students formed a club. In total there were 12 Germans, 8 French, 6 Spanish and 6 Italian. A team of 5 students was going to be randomly selected to participate in a University... more
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Statistics

12/09/21

Statistics Question
A company took a survey asking the employees if they were satisfied with the health Coverage package provided. Of 200 employees surveyed 124 responded YES The 90% CI for the YES is between 56.5 to... more
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Statistics

12/09/21

Statistics Problem

A car manufacturer is estimating the average gasoline consumption for a new car (mpg). A sample of 100 cars provides the following results (use alpha = 0.05)n = 100 x bar = 27 mpg S^2 + 36Can they... more
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Statistics

12/09/21

Statistics Problem

A hotel in South Beach has 30 rooms to rent. The probability for each room to be rented for the next weekend is 0.90. What is the prob that exactly 23 rooms will be rented? ANSWER = .018ANother... more
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Statistics Math Algebra 1 Algebra 2

12/09/21

Need help with Statisitcs.
The weights of adult tuna are normally distributed with a mean of 90 lbs and an standard deviation of 20 lbs. If you catch an adult tuna, what is the probability that it weighs less than 70... more
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Statistics

12/09/21

consider the following data
Consider the following data set consisting of test scores of students in a math class: 5 11 26 56 57 58 61 62 63 63 66 67 68 71 71 71 71 72 72 72 74 79 80 81 84 85 91 a. Obtain the... more
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