A recent survey compared the costs of adoption through public and private agencies. For a sample of 16 adoptions through a public agency, the mean cost was $21,045, with a standard deviation of $835. For a sample of 18 adoptions through a private agency, the mean cost was $22,840, with a standard deviation of $1,545. Assume the sample populations do not have equal standard deviations and use the 0.05 significance level. Required: a. Find the degrees of freedom for unequal variance test. (Round down your answer to the nearest whole number.) Degrees of freedom b. State the decision rule for 0.05 significance level: He: HPublic SHPrivate: Hi: HPublic Herivate (Round your answer to 3 decimal places.) Reject Ho if t c. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal misran

A parent claims that children spend about 2 hours a day in front of computer screens. We think that the parent is underestimating the situation and does a survey of 25 children and finds a mean of 3.5 and sample standard deviation of 1.2 hours.  Check the parents claim at the .05 level.

The average McDonald's restaurant generates $2.2 million in sales each year with a standard deviation of 0.9. Malik wants to know if the average sales generated by McDonald's restaurants in New Jersey is different than the worldwide average. He surveys 32 restaurants in New Jersey and finds the following data (in millions of dollars): 1, 1.2, 2.1, 2.8, 2.7, 1.5, 1.7, 3.5, 1.4, 3.6, 2.3, 2.8, 1.8, 2.1, 1.4, 2.1, 2.8, 2.1, 2.1, 2, 4.1, 3.1, 2.2, 3.7, 2.1, 2.4, 2.8, 1.1, 1.7, 2.2, 1.6, 3.4 Perform a hypothesis test using a 8% level of significance. Step 1: State the null and alternative hypotheses. Ho:?v|?く H。:?v||?く (So we will be performing a Select an answer v test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are Select an answer with distribution mean and distribution standard deviation Step 3: Find the p-value of the point…

Suppose the annual employer 401K cost per participant is normally distributed with a mean of $770.    If 73.89% of such costs are greater than $370, what is the standard deviation of the annual employer 401K cost per participant?