1,012 Answered Questions for the topic Statistics Question

Statistics Question

10/16/15

COMPLETELY CONFUSED
A brand name has a 60% recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 7 randomly selected consumers. Complete parts (a) through (d)... more
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Statistics Question

10/16/15

Requiring Assistance
I'm bewildered on this!!   If np ≥ 5 and nq ≥ 5, estimate P(fewer than 6) with n = 14 and p = 0.5 by using the normal distribution as an approximation to the binomial distribution; if np <5 or... more
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Statistics Question

10/16/15

statistical assistance
I need some help with the answer Please!!!   An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 140 lb and 191 lb. The new... more
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Statistics Question Math Statistics Word Problem

10/15/15

Statistics Probability word problem
A box contains a total of 100 CDs that were manufactured on two machines. Of them, 60 were manufactured on machine 1. Of the total CDs, 15 are defective. Of the 60 CDs that were manufactured on... more
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Statistics Question

10/15/15

Statistics problem
Could someone answer this I’m lost Assume the significance level is a = 0.1 use the given information to find the P – value and the critical value(s). The test statistic of z = 1.62 is obtained... more
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Statistics Question

10/10/15

How large the sample should be in order to estimate the proportion to within 0.025 with 95% confidence, assuming that no previous study has been conducted
How large the sample should be in order to estimate the proportion to within 0.025 with 95% confidence, assuming that no previous study has been conducted
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Statistics Question

10/07/15

about 2.5% of the bulbs last longer than 6800 hours and about 16% of the bulbs last longer than 6500 hours. How long does the average bulb last.
light bulbs  
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Statistics Question Statistics

10/06/15

Statistics questions
What is an example of data that clearly would not fall under a normal curve. 
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Statistics Question Statistics

10/06/15

Stat question help.
if a can of pop has a mean of 12.oz ounces and a standard deviation of 0.11 what is the probability that your coke can have more than 12.00 ounces
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Statistics Question

10/05/15

Need help not good in this course
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights... more
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Statistics Question

10/03/15

P(x>38)= round to the four decimal place
P(x>38)= round to the four decimal place-   assume the random variable x is normally distrubuted with mean u=5 and standard deviation 0=7, compute the probabilty
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Statistics Question

10/01/15

9) The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated that 40% of adult Australian sheep dogs weigh 65 pounds or
9) The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated that 40% of adult Australian sheep dogs weigh 65 pounds or more. A sample of 12 adult dogs is... more
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Statistics Question

10/01/15

A tablet PC contains 8152 music and video files. The distribution of file size is highly skewed.
Assume that the standard deviation for this population is 0.84 megabytes (MB). Suppose that the true mean file size of the music and video files on the tablet is 7.6 MB and you plan to take an SRS... more
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Statistics Question

09/30/15

statistics word problem
A student participated in one game in each of two rounds. 6 of 32 games were lost by his team during the first round. 5 of 32 games were lost by his team during the second round. What are the odds... more
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Statistics Question

09/29/15

Statistic question
Given the following data:222-233-254-241-251-268-276-220-238-253-249-236-247-256-261-227-257-244-239-242a) Construct a frequency distribution using 6 classes.b) Construct a relative frequency... more
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Statistics Question

09/28/15

In a survey of 7000 women 4431 say they change their nail polish once a week. Construct a 90% confidence interval for the population proportion of women who cha
in a survey of 7000 women 4431 say they change their nail polish once a week. Construct a 90%  interval for the population proportion of women who change their nail polish once a week.
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Statistics Question

09/27/15

Please help me with this probibility problem
Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being a girl is 0.42   The table below describes the probability of... more
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Statistics Question

09/25/15

statistics word problem help
One of Umbrella Corporation's manufacturing plants makes two independent products, X and Y. The cost to make X is $ 0.7 per unit and the cost to make Y is $ 0.1 per unit. There is a monthly fixed... more
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Statistics Question

09/23/15

What would cause the mean to be less than the median
What would cause the mean to be less than the median, and under what conditions would the mean and the median be close to one another?
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Statistics Question

09/22/15

statistic help
I have no Idea what to do with this!!!!!   Below are 36 sorted ages of an acting award winner. Find P90 using the method presented in the textbook 24, 26, 32, 33, 34, 35, 37, 37, 38, 3939, 41,... more
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Statistics Question

09/21/15

Statistics problem
I'm having a lot of trouble with this problem   Listed below are the duration (in hours) of a simple random sample all flights of a space shuttle program. Find the range, variance, and standard... more
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Statistics Question

09/21/15

Statistics problem
Refer to the data set of times, in minutes, required for an airplane to taxi out for takeoff, listed below.   47, 50, 46, 28, 48, 34, 46, 45, 17, 45, 16, 1614, 23, 27, 50, 46, 12, 27, 22, 13, 48,... more
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Statistics Question

09/21/15

Statistcs help
I'm lost on this one   Listed below are the duration (in hours) of a simple random sample all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample... more
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Statistics Question

09/19/15

On a TV game show, a contestant is shown 8 products from a grocery store and is asked to choose the three least-expensive items in the set, and then correctly a
On a TV game show, a contestant is shown 8 products from a grocery store and is asked to choose the three least-expensive items in the set, and then correctly arrange these three items in order of... more
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Statistics Question

09/19/15

On a TV game show, a contestant is shown 8 products from a grocery store and is asked to choose the three least-expensive items in the set. The three chosen ite
On a TV game show, a contestant is shown 8 products from a grocery store and is asked to choose the three least-expensive items in the set. The three chosen items need not be in any particular... more
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