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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

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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Statistics Question

09/19/15

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $15,000 loss, probability 0.15 of a $20,

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $15,000 loss, probability 0.15 of a $20,000 loss, probability 0.35 of a... more

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Statistics Question

09/19/15

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $20,000 loss, probability 0.2 of a $20,0

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $20,000 loss, probability 0.2 of a $20,000 profit, probability 0.15 of a... more

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Statistics Question

09/19/15

Probabilities

When company X ships a dozen eggs, there is a 3% chance that exactly one egg will be broken, a 0.5% chance that the whole dozen will be broken, but no chance that any other number of eggs will be... more

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Statistics Question

09/18/15

Statistcs help

Below are 36 sorted ages of an acting award winner. Find the percentile corresponding to age 37 using the method presented in the textbook.18 19 19 20 21 23 26 27 29 30 30 30 33 34 35 35 37 39 40... more

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Statistics Question

09/18/15

Statistcs help

With a height of 63 in, Johnson was the shortest president of a particular club in the past century. The club presidents of the past century have a mean height of 66.5 in and a standard deviation... more

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Statistics Question

09/18/15

Statistcs help

I don’t know I don’t know if the statistics is done on this site however here is my problem and I don’t not have answered this. My booklet says Listed below are the errors between the predicted... more

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Statistics Question

09/17/15

Find the probability that the number of smokers in the sample would be none.

Let say the percentage American adults smoker is 20. Suppose we take a simple random sample of 10 adults. Find the probability that the number of smokers in the sample would be none. (Binomial... more

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Statistics Question

09/17/15

When, if ever, should a researcher use a one-tailed p-value for alpha?

Would researchers use a one-tailed p-value for alpha, if so when?

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Statistics Question Statistics Statistics Method

09/15/15

How do you figure out if coefficients are statistically significant at a certain level?

I have a table with regression statistics, cofficients, SE, t-stat, p-value, lower 85% and upper 95%. I'm not even sure where to start. 1. I need to find statistical significance at 10% 2.... more

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Statistics Question

09/14/15

Determine whether H0 should be rejected

Suppose we have a multinomial population with four categories:A, B, C, and D. The null hypothesis is that the proportion of items is the same in every category. A sample size of 300 yields the... more

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Statistics Question

09/11/15

I need help with this stats question without using technology like Minitab to get the answer

The presence of harmful insects in farm fields is detected by erecting boards covered with a sticky substance and then examining the insects trapped on the board. To investigate which colors are... more

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Statistics Question

09/07/15

quantitative vs qualitative

What are the quantitative and qualitative variables in this study. You are conducting a study of students doing work- study jobs on campus, and you create a survey to gather data.Among the... more

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Statistics Question

09/03/15

Find the range and percentiles

Descriptive Statistics: Obese Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximum Obese 50 ... more

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Statistics Question

09/03/15

Find the z-score and interpret it

1. Find the z-score of the value 139 in a dataset with mean 111 and standard deviation 8. Interpret the z-score in terms of number of standard deviations above or below the mean.z-score=? The... more

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Statistic question

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

Please help me with this probibility problem

statistics word problem help

What would cause the mean to be less than the median

statistic help

Statistics problem

Statistics problem

Statistcs help

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. The three chosen ite

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $15,000 loss, probability 0.15 of a $20,

An investor is considering a $25,000 investment in a start-up company. She estimates that she has probability 0.05 of a $20,000 loss, probability 0.2 of a $20,0

Probabilities

Statistcs help

Statistcs help

Statistcs help

Find the probability that the number of smokers in the sample would be none.

When, if ever, should a researcher use a one-tailed p-value for alpha?

How do you figure out if coefficients are statistically significant at a certain level?

Determine whether H0 should be rejected

I need help with this stats question without using technology like Minitab to get the answer

quantitative vs qualitative

Find the range and percentiles

Find the z-score and interpret it

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