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Problem 1 (Compute CI for small sample using t-distribution given sample statistics). From a population of normally distributed IQ scores, a random sample of 25 scores yields sample mean as X = 98:4 and sample deviation Sx = 14:2. Find a 98% con dence interval for the true mean score of this population. Use Excel's TINV function to obtain your answer.
Problem 2 (Compute CI using t-distribution given raw data). Standardized test scores areoften found to be normally distributed. The data set below is a random sample of combined SAT scores from a group of sophomores picked from a random university. Compute the sample mean, sample deviation and nd a 95% con dence interval for the mean SAT score of sophomores at this university.
1270 1110 1280 970 720 1350 10701220 1220 1020 1210 1170 910 13201160 1150 880 1030 1070 1120950 1440 1080 1020 860 9801070 850 1200 1400 920 800
Use Excel's TINV function to obtain your answer.
Problem 3 (Compare CI using z-score and t-score). A random sample of size 400 from a normally distributed population yields X = 980:5 and Sx = 56:3. Compare the results of finding a 99% con dence interval for when using z-scores rather than t-scores. Use Excel's TINV and NORMINV functions to obtain your answer.
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If the eggs are removed four, five and six at a time, then three, four, and five eggs will remain respectively. If they are taken out seven at a time, no eggs will be left over. Find the lease number of eggs that could be in the basket.
1. Describe the transitive subgroups of Sn for n = 3, 4, 5 2. Find the invariant factors of Z/4Z ⊕ Z/9Z ⊕ Z/50Z. P.S : Please prove the question with step by step.
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why can't I search by subject instead of school? I just want some precalc study resources for my daughter, who is in high school. The organization of this site makes no sense. Isn't there a search box??
Andrew buys a house for $65,000, and the value of the house increases at a rate of 2% per year. How much will the house be worth in 8 years? Round to the nearest dollar.
When the numbers of rows is equal to the numbers of columns equal to 'n'. Where m=n. Then is called.. A.a square matrix B.a column
A baseball diamond is a square 90 feet on a side. A player is running from second base to third base at the rate of 15 feet per second. Find the rate of change of the distance from the player to home plate at the instant the player is 10 feet from..
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