12/08/23

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 164 with 43.3% successes.
Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 164 with 43.3% successes. Enter your answer as a tri-linear inequality... more
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12/04/23

How can I find reliable resources for statistics homework help to enhance my understanding of key concepts and improve my performance in the subject?
How can I find effective assistance and resources for statistics homework help? Are there recommended online platforms, tutoring services, or study materials that provide comprehensive support for... more
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12/01/23

Business statistics

Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported asy=−58.31x+93.97 and the r=... more
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12/01/23

Business statistics

the line of best fit through a set of data isy=−23.955+2.155xAccording to this equation, what is the predicted value of the dependent variable when the independent variable has value... more
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11/30/23

How many parents would need to be sampled? Can I do this on ti-84 calculator
You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately 43.7 dollars.... more
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11/10/23

find the probability that exactly 7 of them say job applicants should follow up within two weeks
Assume that when human resource managers are randomly selected, 41% say job applicants should follow up within two weeks. If 9 human resource managers are randomly selected, find the probability... more
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10/11/23

How Do I Do This
1. A study was conducted on memory recall of residents in a nursing home after a walking program. Individuals were randomly assigned to either the walking group or the no walking group. After... more
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10/08/23

shape of the distribution
The shape of the distribution of the time required to get an oil change at a ​20-minute ​oil-change facility is skewed right.​ However, records indicate that the mean time is 21.1​, and the... more
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10/03/23

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.5 years, and standard deviation of 1.6 years.
The 9% of items with the shortest lifespan will last less than how many years?Give your answer to one decimal place.
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10/03/23

Amount of Nicotine in a certain brand of cigarettes
The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.895 grams and a standard deviation of 0.325 grams. Find the probability of randomly selecting a... more
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09/24/23

Question about privacy

If I start working with a tutor who leaves a summary of a session or we even have a session willl other tutors see that on my profile or is it confidential?
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09/22/23

What reading separates the highest 0.92% from the rest? That is, if P(Z>c)=0.0092, FIND C
Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C.A single thermometer is randomly selected and tested.... more
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09/22/23

What is the P95 score for this population?
In a certain school district in a large metropolitan area, the SAT scores over that past five years are normally distributed with a mean of 1463. Furthermore, Q3 is 1663. What is the P95 score for... more
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09/20/23

Construct the 95% confidence interval for the difference between the population means
Xbar 1 = 31.0Stand Dev =94.3N1 = 29Xbar 2 =26Stand Dev 2 =90.8N2 =29I do not understand the formula.I am looking for step by step with calculations, For an example the first part of the formula is... more
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08/11/23

having trouble booking a session. Asks me to select day/week but not able to edit current day.
having trouble booking a session. Asks me to select day/week but not able to edit current day.
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08/10/23

What sample size would you need to in order to estimate the mean weight of all female white-tailed deer, with a 96% confidence level, to within 8 pounds of the actual weight?

You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past data, you estimate that the standard deviation of all adult female... more
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08/07/23

Consider the following random sample of diameter measurements (in inches) of 19 softballs.
Consider the following random sample of diameter measurements (in inches) of 19 softballs.4.83, 4.77, 4.84, 4.76, 4.83, 4.79, 4.88, 4.72, 4.72, 4.76, 4.73, 4.89, 4.7, 4.75, 4.81, 4.75, 4.75, 4.79,... more
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08/05/23

If n=290 and ˆ p (p-hat) =0.36, find the margin of error at a 90% confidence level Give your answer to three decimals
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08/05/23

If n=290 and ˆ p (p-hat) =0.36, find the margin of error at a 90% confidence level Give your answer to three decimals
If n=290 and ˆp�^ (p-hat) =0.36, find the margin of error at a 90% confidence levelGive your answer to three decimals
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08/03/23

Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability. Compute the following.

Events and are mutually exclusive. Suppose event occurs with probability and event occurs with probability. Compute the following. (A) Compute the probability that A does not occur or B does not... more
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08/02/23

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 500 and a standard deviation of 170.

For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 500 and a standard deviation of 170. The grading process of this year's... more
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08/02/23

Alcohol withdrawal occurs when a person who uses alcohol excessively suddenly stops the alcohol use.

Alcohol withdrawal occurs when a person who uses alcohol excessively suddenly stops the alcohol use. Studies have shown that the onset of withdrawal is experienced a mean of 40.5 hours after the... more
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08/02/23

The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 1.05 pounds.
The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an average (mean) of 1.85 pounds with a standard deviation of 1.05 pounds. In a recent study, a... more
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07/26/23

Elementary Statistics
Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 64 fly balls. Find... more
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07/20/23

A distribution of scores on an aptitude test has a mean of µ =500 and a standard deviation of σ =100. For the population of test-takers who have taken the aptitude test
A distribution of scores on an aptitude test has a mean of µ =500 and a standard deviation of σ =100. For the population of test-takers who have taken the aptitude test; (10 marks) a. What... more
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