The number of cups of coffee enjoyed in a month by randomly selected 50-year-old women and...

The number of cups of coffee enjoyed in a month by randomly selected 50-year-old women and men is listed here.

women	29	25	17	36	41	25	32	29	38	34	24	27	29
men	41	41	37	29	30	38	39	10	29	55	29

Construct a 90% confidence interval and conduct a hypothesis test at a = 0.10 significance level to determine if there is sufficient statistical evidence to conclude that there is a difference in the number of cups of coffee enjoyed in a month by women and by men.

H₀: _________________________________________

H_a: _________________________________________

left-tail right-tail two-tail

z-test t-test df = _________________

test statistic: _________________________

critical value: ________________________

p-value: ____________________________

____ % confidence interval: __________________________

reject H₀ OR do not reject H₀

Expert Solution

Please like ?

orchestra answered 3 years ago

A pediatrician randomly selected 50 six-month-old boys from her practice's database and recorded an average weight...

A pediatrician randomly selected 50 six-month-old boys from her practice's database and recorded an average weight of 15.6 pounds with a standard deviation of 0.45 pounds. She also recorded an average length of 25.7 inches with a standard deviation of 0.27 inches. (a) Find a 95% confidence interval for the average weight (in pounds) of all six-month-old boys. (Round your answers to two decimal places.)_____ lb to______ lb (b) Find a 99% confidence interval for the average length (in inches)...

A certain group of symptom-free women between the ages of 40 and 50 are randomly selected...

A certain group of symptom-free women between the ages of 40 and 50 are randomly selected to participate in mammography screening. The incidence rate of breast cancer among such women is 0.8%. The false negative rate for the mammogram is 10%. The false positive rate is 7%. If a the mammogram results for a particular woman are positive (indicating that she has breast cancer), what is the probability that she actually has breast cancer?

A record of Starbucks coffee shop at Ball State shows that the mean number of cups...

A record of Starbucks coffee shop at Ball State shows that the mean number of cups of coffee consumed by a science-major student is 6 per week. A student in STATs class feels it is greater. She found that the average number of coffee cups had was 9 with a standard deviation of 2 cups for randomly selected 10 science-major students in a week. Assuming that the weekly consumption of coffee by science-major students is normally distributed, test her claim...

There is a 0.9983 probability that a randomly selected 28-year-old male lives through the year. A...

There is a 0.9983 probability that a randomly selected 28-year-old male lives through the year. A life insurance company charges $191 for insuring that the male will live through the year. If the male does not survive the year, the policy pays out 90,000 as a death benefit. Complete parts (a) through (c) below. a. From the perspective of the 28-year-old male, what are the monetary values corresponding to the two events of surviving the year and not surviving? The...

There is a 0.99890.9989 probability that a randomly selected 2929-year-old male lives through the year. A...

There is a 0.99890.9989 probability that a randomly selected 2929-year-old male lives through the year. A life insurance company charges $189189 for insuring that the male will live through the year. If the male does not survive the year, the policy pays out $110 comma 000110,000 as a death benefit. Complete parts (a) through (c) below. a. From the perspective of the 29-year-old male, what are the monetary values corresponding to the two events of surviving the year and not...

There is a 0.9985 probability that a randomly selected 28-year-old male lives through the year. A...

There is a 0.9985 probability that a randomly selected 28-year-old male lives through the year. A life insurance company charges $188 for insuring that the male will live through the year. If the male does not survive the year, the policy pays out $100 comma 000 as a death benefit. Complete parts (a) through (c) below. a. From the perspective of the 28-year-old male, what are the monetary values corresponding to the two events of surviving the year and not...

There is a 0.9985 probability that a randomly selected 32-year-old male lives through the year. A...

There is a 0.9985 probability that a randomly selected 32-year-old male lives through the year. A life insurance company charges $193 for insuring that the male will live through the year. If the male does not survive the year, the policy pays out $110,000 as a death benefit. Complete parts (a) through (c) below. a. From the perspective of the 32-year-old male, what are the monetary values corresponding to the two events of surviving the year and not surviving? The...

A consumer survey has derived the following probability distribution for the number of coffee cups drunk...

A consumer survey has derived the following probability distribution for the number of coffee cups drunk per day no. of cups 0 1 2 3 4 5 6 7 >7 male 0.40 0.34 0.12 0.05 0.04 0.03 0.01 0.01 0.00 female 0.47 0.35 0.08 0.06 0.02 0.01 0.01 0.00 0.00 (a) Separately for each gender, what is the probability of drinking more than two cups per day? Male: Female: (b) Calculate for each gender the average number of cups of...

1) You study the number of cups of coffee consumer per day by students and discover...

1) You study the number of cups of coffee consumer per day by students and discover that it follows a discrete uniform probability distribution with possible values for x of 0, 1, 2 and 3. What is the expected value of the random variable x? 2) The weight of cats is a continuous random variable and has a normal distribution with a mean of 10.27 pounds and a standard deviation of 4.26 pounds. What is the probability that a randomly...

Amount of Prepaid Card ($) Age Days per Month at Starbucks Cups of Coffee per Day...

Amount of Prepaid Card ($) Age Days per Month at Starbucks Cups of Coffee per Day Income ($1,000) 5 25 4 1 20 25 30 12 5 35 10 27 10 4 30 5 42 8 5 30 15 29 11 8 25 50 25 12 5 80 10 50 8 3 30 15 45 6 5 35 15 32 16 7 25 15 23 10 1 20 20 40 18 5 40 35 35 12 3 40 40 28...

Question