To construct an interval estimate for the difference between the means of two populations which are...
To construct an interval estimate for the difference between the means of two populations which are normally distributed and have equal variances, we must use a t distribution with (let n1 be the size of sample 1 and n2 the size of sample 2)
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(n1 + n2) degrees of freedom |
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(n1 + n2 - 1) degrees of freedom |
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(n1 + n2 - 2) degrees of freedom |
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(n1 - n2 + 2) degrees of freedom |
Homework Answers
Solution :-
To construct an interval estimate for the difference between the means of two populations which are normally distributed and have equal variances, we must use a t distribution with
Ans = (n1 + n2 - 2) degrees of freedom
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To construct an interval estimate for the difference between the
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Construct the indicated confidence interval for the difference between the two population means. Assume that the...
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Please Show Work Construct a 98% confidence interval for the difference between two population means using...
Please Show Work
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The information below is based on independent random samples taken from two normally distributed populations having equal variances. Based on the sample information, determine the 95% confidence interval estimate for the difference between the two population means. n1 14 x145 n2 13 2 47 The 95% confidence interval is s (μ1-12) s Round to two decimal places as needed)
are my answers correct? Consider the following data from two independent samples with equal population variances....
are my answers
correct?
Consider the following data from two independent samples with equal population variances. Construct a 99% confidence interval to estimate the difference in population means. Assume the population variances are equal and that the populations are normally distributed x1 = 67.9 s1 = 12.8 n1 = 10 X2 74.8 s2 = 8.1 n2 = 14 Click here to see the t-distribution table, page 1 Click here to see the t-distribution table,_page 2 The 99% confidence interval is...
The information below is based on independent random samples taken from two normally distributed populations having...
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Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are independent simple random samples selected from normally distributed populations. Do not assume that the population standard deviations are equal. A paint manufacturer wished to compare the drying times of two different types of paint. Independent simple random samples of 11 cans of type A and 9 cans of type B were selected and applied to similar surfaces. The drying times, in...
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Please Show Work
Construct a 98% confidence interval for the difference between two population means using the sample data below that have been selected from normally distributed populations with different population variances. Sample 1 Sample 2 392 425 363 476 403 312 294 307 394 348 354 394 308 280 377 379 331 413 398 464 404 283 435 401 The 98% confidence interval is < (41 - H2)s (Round to two decimal places as needed.)
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are my answers
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