8,918 Answered Questions for the topic statistics

Statistics

10/13/23

Statistics Practice Review For Midterm (Need answer, and Method for study)
Andy is a restaurant owner. He believes 82% of his customers are satisfied with the food quality of his restaurant. From a random sample of 99 customers, what are the following probabilities?... more
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Statistics Math

10/12/23

Statistics Chapter 7
Suppose that the duration of a particular type of criminal trial is known to have a mean of 21 days and a standard deviation of 7 days. We randomly sample 9 trials.Ninety percent of the total of 9... more
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Statistics Math

10/12/23

Statistics Chapter 7
Salaries for teachers in a particular elementary school district are normally distributed with a mean of $43,000 and a standard deviation of $6,400. We randomly survey ten teachers from that... more
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Statistics

10/12/23

a tutor wanted to switch to tutoring outside of wyzant
I tried a tutor and they insisted I switch to a session outside of wyzant, to pay on venmo, and moved at an oddly slow pace, which appeared to me to be intended to increase the fees.
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Statistics Math

10/12/23

How do I replace an old x for a new x 80 times automatically?
To put in in different terms, here is what I am trying to find out:1 old x required to make 1.5 new xall old x's must die80 generationsStart at 2I made the equation of (x*1.5), but still need to... more
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Statistics

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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Statistics

10/11/23

How Do I do this
1.    A study was done to see how many calories an individual consumes after experiencing a stressful event such as taking an exam. The study involved two-independent samples. Both... more
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Statistics

10/11/23

How large of a sample size is required?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately =59.3. You would like to be 99% confident that... more
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Statistics Math Probability

10/11/23

Probability Analysis of Opposition to Government-Controlled Health Plans
In a May, 2009 Rasmussen Reports survey, 58% of U.S. adults surveyed opposed "any kind of government-controlled health plan if it meant they had to change their own insurance company". We will... more
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Statistics

10/10/23

Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).
Assume that a sample is used to estimate a population mean. Find the 90% confidence interval for a sample of size 59 with a mean of 48.3 and a standard deviation of 17.9. Enter your answer as... more
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Statistics

10/10/23

Give your answer to two decimal places.
If n=18, (x-bar)=32, and s=2, find the margin of error at a 90% confidence levelGive your answer to two decimal places.
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Statistics

10/10/23

Find the best predicted weight
Question content area topPart 1Listed below are the overhead widths​ (cm) of seals measured from photographs and weights​ (kg) of the seals. Find the regression​ equation, letting the overhead... more
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Statistics

10/10/23

What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =
You wish to test the following claim (Ha) at a significance level of a=0.10.      Ho:p=0.16      Ha:p>0.16You obtain a sample of size n=522 in which there are 110 successful observations. For... more
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Statistics

10/10/23

What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =
You wish to test the following claim (Ha) at a significance level of a=0.10.      Ho:p=0.16      Ha:p>0.16You obtain a sample of size n=522 in which there are 110 successful observations. For... more
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10/10/23

Finance question
The price and market capitalizations of Intel, Microsoft, NIKE, and Alphabet are lised as follows. Intel: $47.60/Share:      Market Cap = $188.7 billion Microsoft: $305.40/Share: Market Cap = $2.2... more
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Statistics

10/10/23

A political candidate has asked you to conduct a poll to determine what percentage of people support her.
A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 7% margin of error at a 90% confidence level, what size of... more
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Statistics

10/09/23

Probability (Statistics)
A particular fruit's weights are normally distributed, with a mean of 529 grams and a standard deviation of 35 grams.If you pick one fruit at random, what is the probability that it will weigh... more
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Statistics

10/08/23

Probability Terminology
According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. [Round your... more
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Statistics

10/08/23

Can you please help me with this
A quiz consists of 10 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing... more
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10/08/23

Statistic Methods in Business question
The most conservative value of π (or p) you can use for proportion confidence intervals is ?
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Statistics

10/07/23

How do I test the significance of the difference between two means when the samples are not independent and number of observations is different for each?
Characteristics of data: marketing research study with total sample of 3500 respondents. Topics included ratings of various brands in a product category. But individual brands were rated ONLY by... more
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Statistics

10/06/23

Suppose that the efficacy of a certain drug is 0.59. Consider the sampling distribution (sample size n = 182) for the proportion of patients cured by this drug
a. What is the mean of this distribution? b. What is the standard error of this distribution? Round the answer to three decimal places.   
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Statistics

10/06/23

A normal distributed population has the following parameters,

µ = 74.7 and σ = 91.6. If a random sample of size n= 139 is selected, a. What is the mean of the distribution of sample means?b. What is the standard deviation of the distribution of sample means?
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Statistics

10/06/23

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed
mean of 55.2 inches, and standard deviation of 2.5 inches.A) What is the probability that a randomly chosen child has a height of less than 59.55 inches?B) What is the probability that a randomly... more
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Statistics

10/06/23

The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days and a standard deviation of 14 days.
The lengths of pregnancies in a small rural village are normally distributed with a mean of 263 days and a standard deviation of 14 days.In what range would we expect to find the middle 98% of most... more
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