40 Answered Questions for the topic Statistic

06/15/16

Probability question: Chances of winning
A contest will award 100 winners with a voucher each. There are 300 participants. Elly joined the contest 3 times, but entering using her details, her sister's details, and her mother's details.... more
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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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Statistic

03/22/16

what is the z-score for which the area to its right is .92
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Statistic

02/19/16

statistic question
Theaters nationwide accept online reservations for movie shows. Of immediate concern is the number of online reservations they will accept relative to how many of those customers will actually show... more
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02/15/16

A report based on the Current Population Survey.....
A report based on the Current Population Survey estimates the 1991 median weekly family wage and salary earnings as $664. An approximate 95% confidence interval for the 1991 median weekly earnings... more
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02/12/16

Survey Statistic Problem
I have no idea how to solve this. Someone please explain to me.   427 different women were randomly selected and asked what they buy online, and 162 of the women says clothes.    If 10... more
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Statistic

11/03/15

Step by step
66% of students at one college drink alcohol regularly and 13% of those who drink alcohol regularly suffer from depression. What is the probability that a random selected student drinks alcohol... more
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Statistic

03/30/15

Help with statistics
1. Determine which of the four levels of measurement (nominal, ordinal, interval, or ratio) is most appropriate.a. Amount of fat (in grams) in cookies.b. Temperatures of ocean at various depths.
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10/05/14

Stats Question
1)Rejecting the null hypothesis when the research hypothesis is false is a. effect size. b. power. c. a Type I error. d. a Type II error 2)Failing to reject the null hypothesis when the... more
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09/29/14

Stats Help Please
A researcher is interested in increasing feelings of self-confidence in adolescents. He randomly selects 100 adolescents from the population and randomly assigns 50 individuals to a treatment... more
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Statistic Math Help

05/15/14

Confidence Interval
Use the sample values listen below to construct a 95% confidence interval estimate of the population mean. assume that the population has a normal distribution   51 63 36 43 34 62 73 39 53 79
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Statistic

02/20/14

statisticWhich data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)? a. Your cu
Which data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)?a. Your current credit card balance.b. Your college... more
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Statistic

02/18/14

statistics question
Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea.b. Wind velocity at 7 o’clock this morning.c. Number of text messages you received yesterday.
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Statistic

05/15/13

examples of mean
how to find mean and mode when you have unknown value in the list
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Statistic

12/18/12

How can you estimate the mean and standard deviation if your given two percentiles and their values
The 16th percentile of a normal distributed variable has a value of 25 and the 97.5th percentile has a value of 40.  
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