The probability of flu symptoms for a person not receiving any treatment is 0.042. In a clinical trial of a common drug used to lower cholesterol, 47 of 1056 people treated experienced flu symptoms. Assuming the drug has no effect on the likelihood of flu symptoms, estimate the probability that at least 47 people experience flu symptoms. What do these results suggest about flu symptoms as an adverse reaction to the drug? (a) P(X247) =| (Round to four decimal places as needed.) (b) What does the result from part (a) suggest? O A. The drug has no effect on flu symptoms because x247 is highly unlikely. O B. The drug has no effect on flu symptoms because x2 47 is not highly unlikely. OC. The drug increases the likelihood of flu symptoms because x2 47 is not highly unlikely. O D. The drug increases the likelihood of flu symptoms because x247 is highly unlikely.

The    Youth    Risk    Behavior    Survey    (a    study    of    public    high    school    students)    showed    that    45    of    675    girls    and    103    of    621    boys    had    been    in    a    physical    fight    on    school    property    one    or    more    times    during    the    past    12    months Using    5%    significance,    perform    an    appropriate    test    of    hypothesis    that    the    proportion    of    girlsinvolved    in    a    physical    fight    on    school    property    is    less    than    the    proportion    of    boys involved    in    a    physical    fight    on    school    property.Step    1:        H0:    ________________             Ha:    ____________________                             Significance    level    α    =0.05Step    2:    Check    necessary    data    conditions    and    compute    an    appropriate    test    statistic:Step    3:    Compute    corresponding    p-value

A researcher has developed a new drug designed to reduce blood pressure. In an experiment, 22 subjects were assigned randomly to the treatment group and received the new experimental drug. The other 24 subjects were assigned to the control group and received a standard, well-known treatment. After a suitable period, the reduction in blood pressure for each subject was recorded. A summary of these data is:   nn x¯x¯     ss Treatment group (new drug) 22 23.48 8.01 Control group (old drug) 24 18.52 7.15 Without using software, how would you estimate the number of degrees of freedom for this problem?   Select one: use the larger value, 23, chosen from the two options 21 and 23 use the smaller value, 22, chosen from the two options 22 and 24 use the larger value, 24, chosen from the two options 22 and 24 use the smaller value, 21, chosen from the two options 21 and 23

The following table was generated from the sample data of 1010 college students regarding the number of parking tickets the student receives in a semester, the student's age, and the student's GPA. The dependent variable is the student's GPA, the first independent variable (x1�1) is the number of parking tickets, and the second independent variable (x2�2) is the student's age.   Coefficients Standard Error t-Stat p-value Intercept −18.593656−18.593656 3.6727623.672762 −5.062581−5.062581 0.0038910.003891 Number of Parking Tickets 0.3232630.323263 0.0657790.065779 4.9144144.914414 0.0044190.004419 Student's Age 1.0181271.018127 0.1791910.179191 5.6817895.681789 0.0023530.002353 Copy Data Step 1 of 2 :   Write the multiple regression equation for the computer output given. Round your answers to three decimal places

54% of students entering four-year colleges receive a degree within six years. Is this percent smaller for students who play intramural sports? 415 of the 800 students who played intramural sports received a degree within six years. What can be concluded at the 0.05 level of significance? H0: p = 0.54 Ha: p  [ Select ] ["<", "Not Equal To", ">"]  0.54 p-Value =  [ Select ] ["0.03", "0.23", "0.06", "0.11"]              [ Select ] ["Fail to Reject Ho", "Reject Ho"]            Conclusion: There is  [ Select ] ["statistically significant", "insufficient"]            evidence to make the conclusion that the population proportion of college students who play intramural sports that receive a degree within six years is less than 0.54. p-Value Interpretation: If the proportion of college students who play intramural sports that receive a degree within six yeas is equal to [ Select ] ["0.52", "0.54", "0.48", "0.50"]and if another study was done with a new randomly selected collection of…

A 2019 study surveyed Norwegian parents about their children's eating habits and taste sensitivities. We are interested in seeing if there is a relationship between sensitivity to sweetness and emotional overeating. The study reports an F* = 2.34 with dfb 3 and dfw = 96. How many levels of 'sensitivity to sweetness' were used in the study? How many subjects participated in the entire study?

Consider the following difference-in-differences estimator for the effect of a newgarbage incinerator on housing values. Rumor of a new incinerator being built in a townin Massachusetts began after 1978, and construction began in 1981. You have data onprices of houses that sold in 1978, and another sample of those that sold in 1981. Youdefine a dummy variable (y81) as equal to 1 if the house sold in 1981, and zero if thehouse sold in 1978. Your hypothesis is that the price of houses located near theincinerator will fall across those years relative to the price of more distant houses. Youdefine a house as being near the incinerator (nearinc) if it is within 3 miles of it. Housingprice (price) is measured in real terms, in 1978 dollars. You estimate the followingregression (standard errors are in parentheses): price = 82,517.23 + 18,790.29y81 -18,824.37nearinc            (2,726.91)      (4,050.07)       (4,875.32)  -11,863.90(y81 * nearinc)  (7,456.65) n=321   Interpret the coeffiecient…

If age were held fixed, but a person put on 15 pounds, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)If a person kept the same weight but got 15 years older, what would you expect for the corresponding change in systolic blood pressure? (Use 2 decimal places.)(e) Test each coefficient to determine if it is zero or not zero. Use level of significance 5%. (Use 2 decimal places for t and 3 decimal places for the P-value.)   t P value β2     β3

A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of n=1100n=1100 registered voters and found that 570 would vote for the Republican candidate. Let pp represent the proportion of registered voters in the state who would vote for the Republican candidate.We test H0:p=.50H0:p=.50Ha:p>.50Ha:p>.50 (a) What is the zz-statistic for this test?   (b) What is the P-value of the test?

A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average difference score of MD - 5.7 and a sum of squares of SS = 2,851.44. What is the sample standard deviation (s) for the D scores? (one decimal)