A researcher gathered a sample of 15 women and 10 men and wanted to know if...
A researcher gathered a sample of 15 women and 10 men and wanted to know if the amount of women to men was significantly unequal. The researcher computed a Chi-Square and got a result of (report the Chi-Square result and df)
Homework Answers
Observed Frequency Expected Frequency
Male 15 25/2 = 12.5
Female 10 25/2 = 12.5
= 1
So, Chi Square Test Statistic is 1 and df = 2-1 = 1
Add Answer to:
A researcher gathered a sample of 15 women and 10 men and wanted
to know if...
A researcher for Malco Pharmaceuticals wishes to determine if women have lower cholesterol levels than men...
A researcher for Malco Pharmaceuticals wishes to determine if women have lower cholesterol levels than men at the .05 significance level. The result of the t test for equal variances is shown below. Men 195.02 63.33 47 Mean Variance Observations Pooled Variance df Stat PIT<t) one-tail Critical one-tail PIT<t) two-tail t Critical two-tail Women 188.88 76.56 50 70.15 95 3.609 0.0002 1.6611 0.0005 1.9853 15: Which statement is correct about the outcome of the hypothesis test? A Reject H, and...
A swim coach wants to know how the times of men compare to those of women....
A swim coach wants to know how the times of men compare to those of women. She randomly selects 53 men and 53 women and has them perform the same event. If she wants to estimate the difference in times between men and women, which procedure should she use? Chi-squared test of independence Two sample t-test Chi-squared goodness of fit test Two sample proportion test ОО Paired t-test
A researcher wants to know whether men and women at a particular company have different mean...
A researcher wants to know whether men and women at a particular company have different mean salaries. She gathers two random samples (one of them from 80 men and the other from 80 women.) This is an independent samples study design. a)True b)False
Are men more charismatic than women? A random sample of 110 men and 220 women is...
Are men more charismatic than women? A random sample of 110 men and 220 women is obtained and they are all given a test for charisma which simply classifies each person as either charismatic or not charismatic. What option would answer the question is charisma a sex -related characteristic ? - One sample t-test? -t-test for r>0 -dependent groups t-test -r squared or r -independent groups t- test -Chi-square test -One Factor ANOVA -z test factor -two factor ANOVA -point...
A researcher claimed that a higher proportion of women than men exercise regularly. A random sample...
A researcher claimed that a higher proportion of women than men exercise regularly. A random sample of 150 men found that 88 of the men exercise regularly, while a random sample of 200 women found that 130 of the women exercise regularly. Test this claim using a significance level of 0.01. What is the z-stat? What is the p-value? What is your decision for the hypothesis test above? Retain or reject Ho? Please write a statement that summarizes your findings...
A physical therapist wanted to know whether the mean step pulse of men was less than...
A
physical therapist wanted to know whether the mean step pulse of
men was less than the mean step pulse of women she randomly
selected 60 men and 78 women to participate in the study each
subject was required to step up and down 6 inch platform the pulse
of each subject was then recorded the following results were
obtained
n Two sample T for Men vs Women N Mean StDev Men 60 112.2 11.5 Women 78 118.9 14.4 99%...
7-1) A police officer interviewed a sample of five men and a sample of five women...
7-1) A police officer interviewed a sample of five men and a sample of five women at various crime scenes. On average, he spent 8.4 minutes interviewing the men (std. dev. = 4.16) and about 14 minutes interviewing the women (Std. dev. = 3.16). He wants to know if there is a significant difference in the amount of time he spent interviewing both gender groups. Knowing that the amount of time the officer spent interviewing both groups is normally distributed:...
7. A student researcher compares the heights of men and women from the student body of...
7. A student researcher compares the heights of men and women from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 14 men had a mean height of 67.7 inches with a standard deviation of 3.06 inches. A random sample of 17 women had a mean height of 64.7 inches with a standard deviation of 1.97 inches. Determine the 90% confidence interval for the true mean difference between...
From a group of 15 men and 10 women. a) How many teams of 3 women...
From a group of 15 men and 10 women. a) How many teams of 3 women and 2 men can be formed? b) What is the probability of forming a team of 5 men?
A researcher wanted to determine if babies were born at different rates in different months. Tracking...
A researcher wanted to determine if babies were born at different rates in different months. Tracking a random sample of birth records for one metropolitan area resulted in the following data. Use a chi-square critical value of 19.675. Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Observed 14 12 12 10 16 9 16 11 21 8 24 9 What are the null and alternate hypothesis for this test? What is the expected number of babies...
A researcher for Malco Pharmaceuticals wishes to determine if women have lower cholesterol levels than men at the .05 significance level. The result of the t test for equal variances is shown below. Men 195.02 63.33 47 Mean Variance Observations Pooled Variance df Stat PIT<t) one-tail Critical one-tail PIT<t) two-tail t Critical two-tail Women 188.88 76.56 50 70.15 95 3.609 0.0002 1.6611 0.0005 1.9853 15: Which statement is correct about the outcome of the hypothesis test? A Reject H, and...
A swim coach wants to know how the times of men compare to those of women. She randomly selects 53 men and 53 women and has them perform the same event. If she wants to estimate the difference in times between men and women, which procedure should she use? Chi-squared test of independence Two sample t-test Chi-squared goodness of fit test Two sample proportion test ОО Paired t-test
A
physical therapist wanted to know whether the mean step pulse of
men was less than the mean step pulse of women she randomly
selected 60 men and 78 women to participate in the study each
subject was required to step up and down 6 inch platform the pulse
of each subject was then recorded the following results were
obtained
n Two sample T for Men vs Women N Mean StDev Men 60 112.2 11.5 Women 78 118.9 14.4 99%...
7. A student researcher compares the heights of men and women from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 14 men had a mean height of 67.7 inches with a standard deviation of 3.06 inches. A random sample of 17 women had a mean height of 64.7 inches with a standard deviation of 1.97 inches. Determine the 90% confidence interval for the true mean difference between...
Most questions answered within 3 hours.
-
lease solve all the
questions, don't need to explanations
Q1 - All animal
species have general...
asked 43 minutes ago -
Business Phasing
1.Discuss the logical progression for growing a business, which
starts from the initial idea...
asked 49 minutes ago -
Modify
When executing on the command line having only
this program name, the program will accept...
asked 2 hours ago -
Kenny Electric Company's noncallable bonds were issued several
years ago and now have 20 years to...
asked 2 hours ago -
find H(e^Jtheta) at theta= 0, pi/10, pi/20, pi/2 for
the following:
a) H(e^Jtheta)= 1+e^Jtheta
b) H(e^Jtheta)=...
asked 2 hours ago -
Home Corporation will open a new store on January 1. Based on
experience from its other...
asked 3 hours ago -
In a neoclassical model, use the IS-LM to analyze the effect of
a permanent money supply...
asked 3 hours ago -
An electron passes through a point 2.67 cm from a long straight
wire as it moves...
asked 4 hours ago -
A grammar is a 4-tuple G, G = (Ν, Σ, Π, Σ, S) where, Ν is...
asked 4 hours ago -
In this part, calculate the present values. Use the Excel PV
function to compute the present...
asked 4 hours ago -
Part 1. Primitive Types, Sorting, Recursion for
Homework.java
a) Implement the static method initializeArray that receives...
asked 6 hours ago -
Using C++, build a sorter that can rank a sequence of numbers in
a descending order....
asked 5 hours ago