945 Answered Questions for the topic Statistics Question

Statistics Question Statistics Numbers Counting Princple

04/16/16

How many different arrangements ?
If a club consist of 10 members, how many different arrangements of president, vice-president, and secretary are possible?
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Statistics Question

04/15/16

Margin of error: 0.048; confidence level: 99% ; p-hat and q-hat unknown
Use the given data to find the minimum sample size required to estimate the population proportion 
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Statistics Question

04/15/16

The probability that z lies between -2.97 and -0.41
if z is a standa normal variable, find the probability 
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Statistics Question

04/13/16

Statistics Question
An engineer who is studying the tensile strength of a steel alloy knows that the population of tensile strength is approximately normally distributed with   standard deviation = 60 psi. He selected... more
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Statistics Question Null Hypothesis Testing

04/12/16

Statistics: Suppose you are using a = 0.05 to test the claim that µ ? 14 using the p-value method.
Suppose you are using α = 0.05 to test the claim that μ ≠ 14 using the p-value method. You are told the TS: z = -1.97 . Find the p-value and determine the decision.   A. 0.0488; do not reject the... more
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Statistics Question Null Hypothesis Testing

04/12/16

Statistics: Given H0: µ = 18 and p-value = 0.070.
Given H0: μ ≥ 18 and p-value = 0.070. Do you reject or do not reject H0 at the 0.05 level of significance?     A.not enough information to decide    B.do not reject H0   C. reject... more
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04/11/16

probability / statistics question?
say that you were taking a multiple choice test and the teacher says you only have 30 seconds left. however, you have 5 questions left that you haven't answered. you have no time to even look at... more
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Statistics Question Calculus Algebra Word Problem

04/10/16

Algerbra/Statistics Word Problem
A 5000 seat theatre has tickets for sale at $25 and $40. How many tickets should be sold at each price for a sellout performace to generate a total revenue of $141,500?
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Statistics Question

04/07/16

A study of 4430 U.S. adults found that 2913 were obese or overweight. The 95% confidence interval for the proportion of adults in U.S who are obese or overweigh
A. (0.646, 0.669)B. (0.644, 0.672)C. (0.639, 0.676)D. (0.650, 0.665)
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Statistics Question Probability Normal Distribution

04/03/16

NOrmal distribution question: Stastics - 2
Suppose a study finds that the wing lengths of houseflies are normally distributed with a mean of 4.55mm and a standard deviation of about 0.392mm. What is the probability that a randomly selected... more
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Statistics Question

04/02/16

70 vinyl records, nine from 40s, 10 from 50s, nine from 60s, seven from 70s, 14 from 80s, randomly selects collection of 70 probability of each decades
butch has a collection of 70 vinyl records from throughout the 20th century
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Statistics Question Word Problem

04/01/16

(a) Determine the appropriate null and alternative hypotheses to answer the question. (b) Suppose the P-value for this test is 0.02. Explain what this val
You Explain It! ATM Withdrawals According to the Crown ATM Network, the mean ATM withdrawal is $67. PayEase, Inc., manufacturers an ATM that allows one to pay bills (electric, water, parking... more
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Statistics Question

03/30/16

A multiple-choice test has four questions. For a student making random guesses for each answer, the probabilities for the number of correct responses are given
A multiple-choice test has four questions. For a student making random guesses for each answer, the probabilities for the number of correct responses are given in this table. Assume that a student... more
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Statistics Question

03/30/16

A discrete probability distribution that applies to occurrences of some event over a specified interval
A discrete probability distribution that applies to occurrences of some event over a specified interval, where the random variable x is the number of occurrences of the event in an interval, is... more
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Statistics Question

03/29/16

given that the population of quarters has a mean weight of 5.67 g and standard deviation of 1.34 g what is the mean of the sample means
I am looking for a solution I didn't think I could solve this without a sample size what am i missing?
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Statistics Question

03/29/16

frequency distribution student ages
age          A=event the student selected is under 2117            B=event the student selected is over 3018            C=event the student selected is in his or her 20s, and19            D=event... more
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Statistics Question Estimate Solutions Population

03/29/16

Statistics question: When 435 college students were surveyed,120 said they visited Instagram today.
When 435 college students were surveyed,120 said they visited Instagram today. Find a point estimate for p, the population proportion of college students who did not visit Instagram... more
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Statistics Question Standard Deviation Mean Confidence

03/29/16

Statistics question: A random sample of 40 statistics students had an average test grade of 81.5
A random sample of 40 statistics students had an average test grade of 81.5 and a standard deviation of 10.2. Construct the confidence interval for the population mean, μ if c = 0.90.   The... more
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Statistics Question

03/27/16

A health study involves 1000 randomly selected daths with a 143 of them caused by a type of cancer
(based on data from Statistics Canada). Using the sample data, construct a 98% confidence interval for the proportion of all deaths caused by cancer.
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Statistics Question

03/27/16

Suppose that we have only 10 temperatures of people undergoing surgery, as below:
36.4  36.3  36.7  36.7  36.8  36.6  36.6  36.5  35.6  36.8 Calculate the sample mean x and standard deviation s Find the margin of error E and construct the 95% confidence interval for the mean... more
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Statistics Question

03/27/16

The time that a skier takes on a downhill course has a normal distribution with a mean of 12.3 minutes and a standard deviation of 0.45 minutes.
What is the probability that on a random run this skier takes less than 11 minutes?
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Statistics Question Standard Deviation Mean

03/27/16

Statistics Question: The repair cost of a Subaru engine is normally distributed with a mean of $5,850 and standard deviation of $1,125.
The repair cost of a Subaru engine is normally distributed with a mean of $5,850 and standard deviation of $1,125. Random samples of 20 Subaru engines are drawn from this population and the mean... more
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Statistics Question Standard Deviation Mean

03/27/16

Statistics Question: The temperature in Orlando on a given summer day is normally distributed with a mean of 98.6° F
The temperature in Orlando on a given summer day is normally distributed with a mean of 98.6° F and a standard deviation of 0.60° F. If 36 summer days in Orlando are randomly selected, find the... more
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Statistics Question Statistics Standard Deviation Mean

03/27/16

statistics question: The salaries of Pet Detectives are normally distributed with a mean of $32,000
The salaries of Pet Detectives are normally distributed with a mean of $32,000 and a standard deviation of $3000. If 100 Pet Detectives are randomly selected, find the probability that their... more
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Statistics Question

03/26/16

Find the probability that a single value of the standard normal random variable will be between zero and 1.52
Find the probability that a single value of the standard normal random variable will be between zero and 1.52
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