Confidence interval of the mean score

Assignment Help Basic Statistics
Reference no: EM1318901

1. The mean of the standard normal distribution is:

A. 1

B. 0

C. 100

D. all of these

2. The standard normal distribution is continuous?

A. true

B. false

3. A walker traveling at 4 miles per hour burns and average of 300 calories per hour.The standard deviation is 8 calories . Find the following for a walker that travels 4 miles in one hour.

Find the probability that a worker burns more that 280 calories is the probability

A. 0.4938

B. 0.0062

C. 0.9938

D. 0.5062

4. Refer to the walk that burns and average of 300 calories and the standard deviation is 8 calories.

What is the probability that the walker will burn less than 293 calories ?

A. 0.1894

B. 0.2106

C. 0.8106

D. 0.5000

5. What is the probability that the walker will burn 285 to 320 calories?

A. 0.9637

B. 0.4699

C. 0.4938

D. 0.0363

6. A point estimate is more likely to occur than and interval estimate

A. true

B. false

7. A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6 . Find the 95% confidence interval of the mean score for all bowlers.

A. (183.56, 188.44)

B. (184.0, 188.0)

C. (184.14 187.86)

D. (184.44, 187.86)

8. Data that can be classified according to color are measured on what scale?

A. nominal

B. ordinal

C. ratio

D.  interval

9. The height of president bush is an example of a variable?

A.  True

B.  False

10. A university dean wants to estimate the average number of hours his part-time instructors teach per week. The standard deviation from a previous study is 2.6 hours how large of a sample is needed if he wants to be 99% confident fo finding whether the true mean differs from the sample mean by 1 hour.

A. 7

B. 19

C.  45

D.  85

Reference no: EM1318901

Define normal mode of operation if frequencies are working

Define a normal mode of operation when at least two frequencies are working and an emergency mode of operation when at least one frequency is working. Define the event when

Find confidence interval for standard deviation

Find the 90% confidence interval for the standard deviation for the time it takes an inspector to check a bus for safety if a sample of 27 buses has a standard deviation of

Ellipse and hyperbola

Find the equation of the Ellipse whose foci coincide with the foci of the hyperbola x^2 - 3y^2 - 2x - 12y + 1 = 0 and whose eccentricity is the reciprocal of that of the hyp

Provide the narrowest confidence interval

A study was conducted to determine the mean number of weekly hours that adults in the US use computers at home. A random sample of 81 adults gives a mean weekly computer usa

Is the hypothesized difference within the interval

Is the hypothesized difference (0.00) within the interval? Given the presence or absence of the 0.00 value within the interval, is this consistent with the findings of the h

Length of time patron spend at the gymnasium

The manager of a local gymnasium has determined that the length of time patron spend at the gymnasium is normal distributed with mean 80minutes and standard deviation 20 min

Difference between population proportions

It is asserted that a greater proportion of males (= x 1 ) contribute to charity than females (= x 2 ). A survey of male and female contributors to charity showed that of 90

Find the least squares prediction equation

The model was fit to the data using SAS. Find the least squares prediction equation on the printout shown below.- Interpret the estimated β coefficients in your model.


Write a Review

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd