1,058 Answered Questions for the topic Statistics Question

Statistics Question

05/04/16

I need help with my statistics problem
The average charitable contribution itemized per tax return in Pennsylvania is? $792 with a standard deviation of? $103. Find the limit for the upper? 30% of contributions. Assume a normal... more
Follows • 1
Expert Answers •1
Statistics Question

05/03/16

statistics
To gather data on a 1200 - acre pine forest in North Dakota, the U.S Forest Service laid a grid of 1410 equally spaced circular plots over a map of the forest. A ground survey visited a sample of... more
Follows • 2
Expert Answers •1
Statistics Question

05/03/16

statistics
Suppose I roll a one four-sided die and one six-sided die. Let X be the sum of the dots showing on two die. How do I find the probabilty distribution of X?
Follows • 2
Expert Answers •1
Statistics Question

04/29/16

Statistics
Find the probability of exactly two success in five trials of a binomial experiment in which the probability of success is 50%. Round to the nearest tenth of a percent.
Follows • 2
Expert Answers •1
Statistics Question

04/29/16

Suppose the average hourly wage of a production line worker in a particular industry is normally distributed with a mean of $9.40 and a standard deviation of $0
Suppose the average hourly wage of a production line worker in a particular industry is normally distributed with a mean of $9.40 and a standard deviation of $0.80. than how much thirty-two percent... more
Follows • 1
Expert Answers •1
Statistics Question

04/29/16

Suppose a population is normally distributed with a mean of 200 and a standard deviation of 40.what's the probability that X > 190
 Suppose a population is normally distributed with a mean of 200 and a standard deviation of 40.what's the probability that X > 190 
Follows • 1
Expert Answers •1
Statistics Question

04/28/16

The continuity correction.
A television network claims that its current affairs program regularly attracts 34% of the total viewing audience. If 400 people, who were watching television at this time, were randomly surveyed,... more
Follows • 2
Expert Answers •1
Statistics Question

04/27/16

The number of freshmen entering college in a certain year is 621. What type of data is 621?
The number of freshmen entering college in a certain year is 621. What type of data is 621?
Follows • 2
Expert Answers •1
Statistics Question

04/27/16

statistics. Would like some explanation in detail please.
135 145 95 140 135 95 110 50 90 165 110 125 80 125 130 110 25 75 65 100 60 125 115 135 95 90 140 40 75 50 130 85 100 160 135 45 135 115 75 130The waking times ( in minutes past 5:00 A.M.) of 40... more
Follows • 2
Expert Answers •1
Statistics Question

04/26/16

on average , a proportion of 0.48 newborns are girls. What are the chances that in a family with 4 children there are exactly three daughters?
Please give the answer as a proportion, rounding to two decimal places.
Follows • 1
Expert Answers •1
Statistics Question Confidence

04/25/16

Which of the following descriptions of confidence intervals is correct?
Which of the following descriptions of confidence intervals is correct? (Select all that apply) a. If a 95% confidence interval contains 0, then the 99% confidence interval contains 0 b. If a 99%... more
Follows • 2
Expert Answers •1
Statistics Question

04/24/16

Probability
Two cards are selected from a standard deck of 52 playing cards. The first is replaced before the second card is selected. Find the probability of selecting a spade and then selecting a... more
Follows • 2
Expert Answers •1
Statistics Question

04/21/16

Statistics
Roxie Balboa, the fighter that you are willing to represent had 50 fights, winning 47 and losing 3 fights. Calculate the possibility that she will win her next fight. Calculate the possibility that... more
Follows • 3
Expert Answers •2
Statistics Question Interval Confidence

04/20/16

Statistics: A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television
A recent study of 40 randomly selected children ages 6-8 found that the mean length of time spent watching television each week was 12 hours and the standard deviation was 2.5 hours. The mean time... more
Follows • 2
Expert Answers •1
Statistics Question

04/20/16

I need help with Stats
A personality scale has scores that are normally distributed with a mean of 150 and a standard deviation of 20. 1. What proportion of people score lower than a percentile rank=143 P(X<143)? 2.... more
Follows • 2
Expert Answers •2
Statistics Question Statistics Probability & Statistics

04/20/16

Probability Question
The barton Company manufactures automobile charge indicator gauges. Under test conditions, these gauges are supposed to read 0 volts. However, some gauges read slightly more than 0 volts and some... more
Follows • 1
Expert Answers •1
Statistics Question

04/19/16

An automobile manufacturer claims that their jeep has a 29.1 miles/gallon (MPG) rating.
An automobile manufacturer claims that their jeep has a 29.1 miles/gallon (MPG) rating. An independent testing firm has been contracted to test the MPG for this jeep. After testing 200 jeeps they... more
Follows • 2
Expert Answers •1
Statistics Question Statistics Stats

04/19/16

use the given degree of confidence and sample data to construct a confidence interval for the population proportion p
If 92 adults selected randomly from one town, 70 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance 
Follows • 2
Expert Answers •1
Statistics Question Statistics Statistic Stats

04/17/16

Find the best point estimate of the proportion of people who wear hearing aids if, in a random sample of 640 people, 73 people had hearing aids
Solve the proble. Round the point estimate to the nearest thousandth.
Follows • 1
Expert Answers •1
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?
Follows • 3
Expert Answers •2
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 
Follows • 2
Expert Answers •1
Statistics Question Statistics Statistic Stats

04/15/16

N=56, x=19; 95% confidence
use the given degree of confidence and sample data to construct interval for the population proportion p.
Follows • 1
Expert Answers •1
Statistics Question

04/15/16

Find the critical value z a/2 that corresponds to 68% confidence level
find the indicated critical z value
Follows • 1
Expert Answers •1
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 
Follows • 2
Expert Answers •1
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
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.