1,010 Answered Questions for the topic Statistics Question

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
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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?
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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
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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.
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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
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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
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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
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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
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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
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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
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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
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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 
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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.
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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

Find the critical value z a/2 that corresponds to 68% confidence level
find the indicated critical z value
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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 Algebra 2 Probability Distribution

04/03/16

Normal Distribution: Statistics Question
Suppose birth weight is normally distributed with a mean of 7.5 pounds and a standard deviation of 1 pound. What is the probability that out of 5 randomly selected babies, exactly 4 of them are... more
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