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# A sample of n = 4 scores has SS = 12. What is the standard deviation for the sample?

choices :  3 square root of 3 4 square root of 4   wrong answer: square root of 3

# A sample has SS = 20 and s2 = 4. There are _____ scores in the sample.

wrong answer : 5    how do i solve this?

# how do i solve this problem?

a certain type of oak tree has a mean growth of 14.3 inches in 4 years. a forest biologist believes a new variety has a greater mean growth during the same length of time. a 36 tree sample of the...

# Statistics True or False

When testing a claim about a population proportion, the P-value method and critical value method will produce the same result when deciding whether or not to reject the null hypothesis. A)...

# Need help with statistic Question (Please show all steps)

The A.C. Nielsen Company reported that the mean weekly television viewing time for children aged 2-11 is 24.50 hours. Assume that the weekly television viewing times of such children are normally...

# Need help with statistic Question (Please show all steps)

Find the confidence level and α for: a. An 85% confidence interval. b. A 95% confidence interval.

# Need help with statistic Question (Please show all steps)

Given the sample mean, population standard deviation, and confidence level, use the one-mean z-interval procedure to find a confidence interval for the mean of the population.   X‾ =25...

# Need help with statistic Question

In a standard normal curve, the area under the density curve that lies between 30 and 40 is 0.832. What percentage of all possible observations of the variable are either less than 30 or greater...

# Need help with statistic Question (Please show all steps)

Find the area under the standard normal curve that lies: a. Either to the left of -1 or to the right of 2. b. Either to the left of -2.51 or to the right of -1.

# At .05 significance level can we conclude that there is more variation in the oil stocks?

A stockbroker at critical securities reported that the mean rate of return on a sample of 10 oil stocks was 12.6 percent with a standard deviation of 3.9 percent. The mean rate of return on a sample...

# Can someone please explain the LINE assumptions for regression ?

If there is a u-shape in the scatterplot, how do we handle the violation to linearity?  Thank you.

# what is the probability that if there is 60% chance of rain each day that it will rain the first time on the 3rd day of the week

what is the probability that if there is 60% chance of rain each day that it will rain the first time on the 3rd day of the week i need help

# A cellphone company provider has the business objective of wanting to estimate

A cellphone company provider has the business objective of wanting to estimate the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at...

# The quality-control manager at a light bulb factory needs to determine whether the mean life of a large shipment

of light bulbs is equal to 375 hours.  The population standard deviation is 120 hours.  A random sample of 64 light bulbs indicates a sample mean life of 350 hours. A.  At the 0...

# Do marketing majors at your school study more than, less than, or about the same as marketing majors at other schools?

The Washington Post reported the results of the National Survey of Student Engagement that found marketing majors studied an average of 12.1 hours per week.  Set up a hypothesis test to try to...

# data statistics question

The owner of an apartment complex is preparing a report about the property. He wants to show how the number of available apartments changed during the year as the nearby factory closed down. Which...

# Statistics question; part of the chapter dont understand; Thank you

Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below (based on data from “Content and Ratings of Teen-Rated Video Games,”...

# Statistics

A grocery store has four check-out counters. The average service rate for each check-out counter is 22 customers per hour. The average arrival rate is 82 customers per hour. Assuming it is a multiple-server...

# how would you judge which class performed best?

Leaf                                       Stem                ...

# Many consumer groups feel that the U.S. Food and Drug Administration (FDA) drug approval process is too easy,

and as a result, too many drugs are approved that are later found to be unsafe.  On the other hand, a number of industry lobbyists have pushed for a more lenient approval process so that pharmaceutical...