Question

Random samples of female and male UVA undergraduates are asked to estimate the number of alcoholic drinks that each consumes on a typical weekend.

The data is below:

Females (Population 1): 3, 3, 4, 3, 4, 3, 5, 6, 2, 2

Males (Population 2): 6, 8, 8, 7, 7, 6, 4, 7, 5, 7

Give a 93.5% confidence interval for the difference between mean female and male drink consumption.

(Assume that the population variances are equal.)

1. Confidence Interval =

Answer #1

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below:
Females (Population 1): 3, 2, 4, 3, 4, 1, 3, 2, 3, 0
Males (Population 2): 6, 8, 6, 5, 7, 8, 6, 5, 6, 6
Give a 92.9% confidence interval for the difference between mean
female and male drink consumption. (Assume that the population
variances are equal.)
Confidence Interval =

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below: Females (Population 1): 2, 2,
0, 3, 0, 2, 1, 0, 4, 4 Males (Population 2): 5, 5, 8, 7, 8, 9, 6,
7, 5, 6 Give a 94.5% confidence interval for the difference between
mean female and male drink consumption. (Assume that the population
variances are equal.) Confidence Interval =

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below: Females (Population 1): 2, 4,
4, 5, 4, 3, 5, 4, 2, 2 Males (Population 2): 8, 9, 6, 9, 9, 5, 5,
7, 8, 8 Give a 91.6% confidence interval for the difference between
mean female and male drink consumption. (Assume that the population
variances are equal.) Confidence Interval =

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below: Females (Population 1): 4, 1,
5, 3, 2, 4, 3, 4, 1, 5 Males (Population 2): 7, 7, 7, 5, 6, 5, 6,
7, 4, 5 Give a 93.3% confidence interval for the difference between
mean female and male drink consumption. (Assume that the population
variances are equal.)
Confidence Interval =

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below: Females (Population 1): 4, 4,
1, 2, 2, 1, 4, 1, 2, 3 Males (Population 2): 8, 8, 8, 8, 7, 7, 8,
9, 9, 7 Give a 92.2% confidence interval for the difference between
mean female and male drink consumption. (Assume that the population
variances are equal.) Confidence interval =?

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below: Females (Population 1): 1, 5,
4, 3, 2, 5, 4, 2, 3, 2 Males (Population 2): 7, 4, 3, 4, 5, 7, 4,
4, 5, 4 Give a 92.6% confidence interval for the difference between
mean female and male drink consumption. (Assume that the population
variances are equal.) Confidence Interval =

Random samples of female and male UVA undergraduates are asked
to estimate the number of alcoholic drinks that each consumes on a
typical weekend. The data is below:
Females (Population 1): 0, 1, 1, 0, 2, 2, 1, 0, 4, 1
Males (Population 2): 5, 4, 6, 5, 6, 6, 5, 4, 4, 6
Give a 93.2% confidence interval for the difference between mean
female and male drink consumption. (Assume that the population
variances are equal.)
Confidence Interval =

In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1 =not attractive; 10 =extremely
attractive). Construct a confidence interval using a 95%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult
females?
8, 8, 3, 9, 4, 6, 7, 9, 7, 10, 5, 8
What is the confidence interval for the population mean...

In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 99%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females? 5,
8, 2, 8, 6, 6, 7, 8, 8, 10, 3, 9
What is the confidence interval for the population mean
muμ?

Salary information regarding male and female employees of a
large company is shown below.
Male Female
Sample Size: 64 36
Sample Mean Salary (in $1,000): 44 41
Population Variance: 128 72
1.) The standard error for the difference between the two means
is
2.) The point estimate of the difference between the means of
the two populations is
3.) At 95% confidence, the margin of error is
4.) The 95% confidence interval for the difference
between the means of the two...

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