27 Answered Questions for the topic Null Hypothesis Testing

Null Hypothesis Testing Statistcs Null And Alternate Hypotheses

08/21/18

05/06/16

#### Compute the corresponding z-value for the following situation:

A newspaper claims that 52% of voters will vote for a particular candidate in an upcoming election. A random survey of 1000 voters shows that 48% will vote for that candidate, with a standard... more
Null Hypothesis Testing Statistics

04/29/16

#### Can someone explain to me why I got this wrong?

Can someone explain to me how I got this question wrong?True/False. It is easier to reject the null hypothesis if the researcher uses a smaller alpha(a) level?I said False As alpha decreases, the... more
Null Hypothesis Testing Statistics

04/25/16

In a study of proctored and non-proctored tests in an online course, researches obtained the data below: Group 1 (Proctored): ?? = 30, ??¯ = 74.30, ?? = 12.87 Group 2 (Non-proctored): ?? = 32, ??¯... more
Null Hypothesis Testing Standard Deviation

04/22/16

#### Null Hypothesis

Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen... more
Null Hypothesis Testing Ttest

04/13/16

#### Was the null hypothesis for the first value of t rejected? Explain.

Empathy subscale   Perspective-talking: Men: Mean 17.89 Standard Deviation 3.64 Women: Mean 18.37 Standard Deviation 3.52 df: 652 t: 1.75
Null Hypothesis Testing Statistics Question

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

01/17/16

#### Test significance of the correlation between the General Weighted Average and the daily allowance of junior students at ? =0.05.

GWA of Junior Students (Non-Working)/ Daily Allowance1.9 /1502.3/ 1202.2 /1102.9 /1001.4/ 1002.4 /1001.7/ 1002.4 /1002.1 /1002 /802.4 /802 /801.2/ 753.2 /752.4 /702.5 /701.1 /701.3 /702.8 /702.8... more
Null Hypothesis Testing

10/26/15

#### Test Statistics and P-value

Among n babies born in a certain city, 51% were boys. Suppose we want to test the hypothesis that the true probability of a boy is 1/2. Conduct the appropriate test for this situation, using a... more
Null Hypothesis Testing Statistics Question Z Score

08/12/15

#### College Statistics problem help

A weight loss center provided a loss for 72% of its participants.  The center’s leader decides to test a new weight loss strategy on a random sample size of 140 and found weight loss in 78% of the... more

08/12/15

#### Statistics question. Null, alternative hypothesis

You are studying what proportion of SU students smoke.  The null hypothesis is p = 0.27, and the alternative hypothesis is p > 0.27.  Your study obtains a p-value of 0.001.  Using a significance... more
Null Hypothesis Testing

08/05/15

#### state hypothesis and null hypothesis

you are testing the claim of "the big cookie" company that it puts 20 chocolate chips in its big cookies. Many consumers have complained that they have been short changed. Test the claim from the... more
Null Hypothesis Testing Statistics

04/17/15

#### Write the two hypotheses and find the pvalue.

1. The Centers for Disease Control and Prevention reported a survey of randomly selected Americans age 65 and older, which found that 535 of 1068 women and 421 of 1012 men suffered from some form... more
Null Hypothesis Testing

04/11/15

#### What is the null hypothesis?

1. The Coca-Cola company wants to evaluate how consumers will respond to a newly developed energy drink. The key question is whether consumer’s preference for the drink depends on the amount of... more
Null Hypothesis Testing Statistics

03/22/15

#### Null and alternative hypotheses set up

In a survey of 1120 new college graduates 281 had a professional job on graduation day. One year ago the proportion of graduates with a professional job on graduation day was 24%. The setup of the... more

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