A physician wants to know if the patients in her practice drink less than 64 ounces of water per day. If she is going to do hypothesis testing, should she use a) A two sided test b) A left-tailed one sided hypothesis  c) None of these is correct  d) A right- tailed one sided hy

a) The null hypothesis for this test would be: b) The alternative hypothesis? c) What is the value of the test statistic, Z?

Is there a difference in the car brand's countries for Midwesterners and people from the west coast? Of the 170 randomly selected Midwesterners surveyed 50 had an American car, 100 had a car from Asia, and 20 had a cars from another country. Of the 159 randomly selected people from the west coast who were surveyed, 44 had an American car, 81 had a car from Asia, and 34 had a car from outside of the US and Asia. Conduct the appropriate hypothesis test using an αα = 0.05 level of significance. What is the correct statistical test to use? Goodness-of-Fit Independence Paired t-test Homogeneity What are the null and alternative hypotheses?H0:H0:  Address and car brand's countries are dependent. The distribution of car brand's countries is not the same for Midwesterners and people from the west coast. Address and car brand's countries are independent. The distribution of car brand's countries is the same for Midwesterners and people from the west coast. H1:H1:  The distribution…

A study was done to determine whether the proportion of women who had accidents on Friday the 13th was greater than the proportion of men who had accidents on Friday the 13th. To find out, a random sample was taken of 2,000 individuals. Each individual was asked their gender and whether they had been involved in an accident on Friday the 13th. a)What is the explanatory variable, and is it quantitative or categorical? b)What is the response variable, and is it quantitative or categorical? c)What procedure should be used for this test?

Better than aspirin? A very large study showed thataspirin reduced the rate of first heart attacks by 44%. Apharmaceutical company thinks they have a drug that will be more effective than aspirin, and plans to do a random-ized clinical trial to test the new drug. a) What is the null hypothesis the company will use?b) What is their alternative hypothesis?They conducted the study and found that the groupusing the new drug had somewhat fewer heart attacksthan those in the aspirin group.c) The P-value from the hypothesis test was 0.28. Whatdo you conclude?d) What would you have concluded if the P-value hadbeen 0.004?

please answer a, b, c

7. You have seen this question before. Human volunteers were asked to try five types of meat products. One of these was dog food; the others were various types of pâté. The volunteers were asked which of the five was their favorite. Two out of 18 volunteers chose the dog food. Is there evidence that people prefer human food over dog food? Show all four steps of hypothesis testing.

is there enough evidence to reject the claim?

Historically, the percentage of U.S. residents who support stricker gun control laws has been 52%. In order to see if the support for strick gun control laws has decreased, a random sample of 1011 people was interviewed and found that 495 were in favor of stricker gun control laws a) Set up the null and alternative hypothesis in symbols. b) Calculate the sample proportion and of who support stricker gun control laws. c) Find the standard error of the proportion d) Find the value of z statistic. e) Find the P-value f) If the level of significance is 0.05, what is your conclusion about gun control support ( it remains same or changed)

A student majoring in Management who has passed the Business Statistics course suspects that the average price of lunch at the canteen has increased during the pandemic. Before the pandemic, the price for lunch he paid was $21, $22, $22.50, $23, $23.50. After the pandemic, he paid $25, $25.50, $30, $27, and $26.50. a) Perform a hypothesis test analysis to find out whether there has been an average increase in the price of lunch (Use six Hypothesis Testing Steps) ! b) Interpret (and explain) the results of point a above!