970 Answered Questions for the topic Statistics Question

Statistics Question Statistics

12/03/15

Hypothesis testing!!
I am so lost in where to begin for this question...   A random sample of 10 students were trying to determine which profession was best suites for them. They each took aptitude tests for Social... more
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Statistics Question

12/02/15

Percentage of graduates that get degree in 5 years when average is 6.5 and standard deviation is 1
Standard deviation is 1 year and average is 6.5 years 
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Statistics Question

12/01/15

The weights of cockroaches living in a typical college dorm are approximately distributed with a mean of 80 grams and a standard deviation of 4 grams.
The percentage of cockroaches weighing between 71 grams and 80 grams is about?
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Statistics Question

12/01/15

Findinng the proportion
Using sample data A confidence level of 95% N=2392 x=971 What is the best point estimate of the population proportion P.  Please round 3 places. Thanks
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Statistics Question

11/29/15

16. What is the Pvalue?
A 1-tail, normal distribution of n = 64, alpha risk = 10%.Sample mean = 206; Ho: Population mean is no more than 202Sample standard deviation = 16.What is the Pvalue?
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Statistics Question Expected Value

11/28/15

Expected Value
I get to answer 1 question a day that I have a 70% chance of getting that question right. I'm offered prizes for getting a streak of questions right in a row. However, anytime I accept a prize, the... more
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Statistics Question

11/28/15

Business Statistics
Assuming that women's heights are normally distributed with a mean of μ=63.6 and standard deviation δ=2.5 in find the following: a) P(63.6 +n/10<x<65.0+n/10) b) P(x>58.1+n/10) Note n=20   more
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Statistics Question

11/26/15

Find sample size
A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of plus-or-minus 5 % with 99% confidence, and we do... more
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Statistics Question

11/24/15

Statistics Normal Distribution with Standard deviations
Question 1: A manufacturer of ice pops fills each plastic container with a fruity liquid,leaving enough room so that consumers can freeze the product. A filling machine is set sothat the amount of... more
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Statistics Question Statistics Normal Distribution

11/23/15

A new drug will not be considered for acceptance by Health Canada unless it causes serious side effects in less than 0.01percent of the population
A new drug will not be considered for acceptance by Health Canada unless it causes serious side effects in less than 0.01percent of the population. In a trial with 80,000 people, 9 suffered serious... more
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Statistics Question

11/23/15

difficult statistics question................................. see below
4. (Hypothetical) You are conducting research on the prevalence of severe binge drinking among college students. You define severe binge drinking as consuming 10 or more alcoholic beverages at a... more
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Statistics Question

11/23/15

How many households must you survey if you want to be 94% confident that your sample percentage has a margin of error of three percentage points?
a. Assume that a previous study suggested that vehicles are owned in 86% of households. b. ) Assume that there is no available information that can be used to estimate the percentage of ... more
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Statistics Question

11/21/15

Statistics: How to determine Ho and Ha?
Does the princeton Review improve SAT scores? Five students were SRS and asked to participate in the experiment. Their SAT scores were recorded before the review and after the review.   Person:  ... more
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Statistics Question

11/19/15

A and B are both independent. The probability of A is .11 and the probability B is .89. what is the probability of A given B
The probability of A given B. Also known as P(A l B)
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Statistics Question Math Statistics Mathmatics

11/17/15

Find a 90% confidence interval for the population average startup costs µ for candy store franchises
Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as... more
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Statistics Question Math Statistics Mathmatics

11/17/15

Compute 95% and 99% confidence intervals for µ using Method 1 with a Student's t distribution!
When σ is unknown and the sample is of size n ≥ 30, there are two methods for computing confidence intervals for μ. Method 1: Use the Student's t distribution with d.f. = n − 1. This is the... more
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Statistics Question Math Statistics Mathmatics

11/17/15

A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error? Hint
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 38 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that σ is... more
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Statistics Question

11/17/15

Assume Ho: µ=100 was rejected with a= .01 what would the value of 100 fall within the .99 confidence interval? Why?
 Assume Ho: μ=100 was rejected with α= .01what would the value of 100 fall within the .99 confidence interval? Why?
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Statistics Question

11/17/15

A weight loss program advertises "LOST 40 POUNDS IN 4 MONTHS".
A random sample of n = 25 customers has x ¯= 31 pounds lost and s = 12. To contradict this claim test H0: μ = 40 versus H1: μ < 40 at α = 0.05.     Find the associated p-value. Round to four... more
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Statistics Question

11/17/15

From a random sample of size 14, one has calculated the 95.0% confidence interval for µ and obtained the result (15.3, 27.1).
(a) What were the Upper X overBar and s for that sample.   (b) Calculate a 98.0% confidence interval for μ . Round your answer to 2 decimal places.(two answers for this problem)
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11/16/15

needs to be answered ASAP please
harry needs to write christmas cards, however he can only write lists in these 2 ways   girl                 boy boy                girl girl                 boy   if there are 10 girls and... more
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11/14/15

An MP3 player is loaded with 50 musical selections: 20 rock selections, 13 jazz selections, and 17 blues selections.
The player is set on random play, so selections are played randomly and can be repeated . Determine the probability of each of the following outcomes. (a) The first four selections are all... more
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Statistics Question Math Statistics Mathmatics

11/13/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request
It is estimated that 3.2% of the general population will live past their 90th birthday. In a graduating class of 737 high school seniors, find the following probabilities. (Round your answers to... more
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Statistics Question

11/12/15

if 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 20 bolts, there are 4 or less defective bolts?
i have an answer but im not sure if its the correct one
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Statistics Question

11/09/15

if you have 8 pennies in your pocket, and you pull the coins out of your pocket 1 at a time, what is the probablility that they are taken out in order by date.
if you have 8 pennies in your pocket dated, 1972, 1978, 1979, 1985, 1989, 1991, 1993, and 1995. if you take the coins out of your pocket 1 at a time,  what is the probablility that they are taken... more
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