Mathematics, 02.10.2019 10:30, Bombin1118
The probability that any child in a certain class travels to school by bus is 2/5. if 4 children from the class are selected ata random, what is the probability 1. none of them travels to school by bus 2. three of then travel to school by bus 3. at least one of them travels to school by bus?
Answers: 1
Mathematics, 21.06.2019 20:30, avahrider1
The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle
Answers: 1
Mathematics, 22.06.2019 00:30, nataliemoore1974
Olivia is using 160 quilt squares to make a red, yellow, and blue quilt if 25% of the quilt are red and 30% are yellow how many quilt squares are blue
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: μ=6.4 and ha: μ> 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
The probability that any child in a certain class travels to school by bus is 2/5. if 4 children fro...
Mathematics, 15.04.2020 23:32