Mathematics, 20.11.2019 20:31, bigblow
Ten measurements of impact energy on specimens of a238 steel at 60 Âșc are as follows: 64.1, 64.7, 64.5, 64.6, 64.5, 64.3, 64.6, 64.8, 64.2, and 64.3 j. a. use the studentâs t distribution to find a 95% confidence interval for the impact energy of a238 steel at 60 Âșc. b. use the studentâs t distribution to find a 98% confidence interval for the impact energy of a238 steel at 60 Âșc.
Answers: 2
Mathematics, 21.06.2019 19:00, sammizwang
Marina baked cookies. she gave 3/4 of the cookies to the scout bake sale. she shared the remaining 6 cookies with her friends. how many cookies did marina bake?
Answers: 3
Mathematics, 22.06.2019 02:30, Leii691
According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: Ό=6.4 and ha: Ό> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.
Answers: 3
Ten measurements of impact energy on specimens of a238 steel at 60 Âșc are as follows: 64.1, 64.7, 6...
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