Homework Help for Statistics (page 4)

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what is the standard deviation of this table 

Answered
15 Mar 2019

Table 1: Summary statistics of the extra sodium content (%) in the thirty samples

 Min.   : 0.14
 1st Qu.: 1.17
 Median : 2.13
 Mean   : 2.4813
 3rd Qu.: 3.86
 Max.   : 5.22
 
 SD = 1.6156
Researchers believe that the average percentage of sodium content is 3%. Test the appropriate hypotheses using a 5% level of significance.
  1. Specify the following:
  • random variable of interest
  • parameter of interest (Symbol for the parameter)
  • statistic you would use to estimate parameter
 

Answered
15 Mar 2019

This is a statistic practice quiz answer please

Answered
13 Mar 2019

This is a statistic practice quiz answer please

Answered
13 Mar 2019

This is a statistic practice quiz answer please

Answered
13 Mar 2019

Hello this a statistics practice quiz 

Answered
13 Mar 2019

The percent of science students (other than students in Mathematics and Statistics) who are doing a minor in statistics is 20%. If 300 students are selected what is the approximate probability that a) more than 150 are taking a minor in statistics b) between 40 and 70 are taking a minor in statistics c) exactly 50 are taking a minor in statistics. 

Answered
12 Mar 2019

Some of the statements below refer to the null hypothesis, some to the alternate hypothesis. 

State the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the appropriate parameter (μ or p).

 Private universities' mean tuition cost is more than $20,000 per year.

Answered
7 Mar 2019

total number of ways the top 4 races in a 20 person race can finish

Answered
7 Mar 2019

The number of minutes spent reading in one day is normally distributed with a mean of μ = 23 and a standard deviation of σ = 5. How much time would you have to spend reading in a day to find yourself in the top 10% of readers?

Answered
7 Mar 2019

keywords for a research study on veganism and vegetarians 

Answered
6 Mar 2019

I need help conducting a z-test for my assignment. The question states, "You want to determine if Canadians are nicer (less rude) than Americans. Americans 'niceness' score is µ=2.4 with a standard deviation of 1.6. You get a sample of n=36 Canadians to complete the same niceness questionnaire. You calculate descriptive statistics for your sample as M=2.9 and s=1.9. As this is exploratory research, use an alpha of .10. Conduct a z-test on the information above. Make sure to note: 1.) the formula, 2.) the null and alternative hypothesis, 3.) the critical value, 4.) calculate the result (show calculation in case of error), 5.) What is the statistical decision, 6.) What does this mean in plain english?"

Thanks for the help!

Answered
6 Mar 2019

A survey randomly calls
people from the phone book and asks them to answer a long series of questions.

Answered
5 Mar 2019

A standard deck of cards contains 52 cards. One card is selected from the deck.

Answered
2 Mar 2019

Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15.

Answered
28 Feb 2019