Suppose that in a random selection of 100 colored candies, 28% of them are blue. The candy company claims that the percentage of blue candies is equal to 30%. Use a 0.05 significance level to test that claim.

Identify the null and alternative hypotheses for this test. Choose the correct answer below. Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is ______ (Round to two decimal places as needed.) Identify the…

An old medical textbook states that the mean sodium level for healthy adults is 138 mEq per liter of blood. A medical researcher believes that, because of modern dietary habits, the mean sodium level for healthy adults, μ, now differs from that given in the textbook. A random sample of 50 healthy adults is evaluated. The mean sodium level for the sample is 140 mEq per liter of blood. It is known that the population standard deviation of adult sodium levels is 11 mEq/L. Can we conclude, at the 0.05 level of significance, that the population mean adult sodium level now differs from that given in the textbook?

Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H0​ and…

The mean SAT score in mathematics is 596. The standard deviation of these scores is 25. A special preparation course claims that the mean SAT score, μ\muμ, of its graduates is greater than 596. An independent researcher tests this by taking a random sample of 90 students who completed the course; the mean SAT score in mathematics for the sample was 597. At the 0.05 level of significance, can we conclude that the population mean SAT score for graduates of the course is greater than 596? Assume that the population standard deviation of the scores of course graduates is also 25.

Perform a ______ test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis $(H_0)$ and…

Hours Dogs Sleep The Canadian Press reported that dogs sleep on average 14 hours per day. A veterinarian studied a random sample of 50 dogs and found that they sleep on average 15.4 hours. The standard deviation of the population, which was 1.7 hours, was found from previous studies. At α=0.10\alpha = 0.10α=0.10, can it be concluded that on average dogs sleep more than 14 hours per day? Assume the variable is normally distributed. Use the critical value method.

(a) State the hypotheses and identify the claim with the correct hypothesis. $H0​:μ=14 $ (not claim) $H1​:μ>14 $ (claim) This hypothesis test is a _____ test. (b) Find the critical value(s). Round the answer(s) to at least two decimal places.…

Suppose GHC wanted to understand the commute on different campuses. They believe the current commute is greater than 28 minutes with a standard deviation of 6 minutes. They decide to survey students and record their commute times.

They are able to survey 150 students and find a commute time of 29.5 minutes. At the 5% level of significance, is the current commute time greater than 28 minutes for GHC students accurate? Answer: Given Data:The population mean (μ)=28The sample standard deviation (s)=6The sample size (n)=150The sample…